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s2anet
|
s2anet-master/mmdet/core/bbox/samplers/base_sampler.py
|
from abc import ABCMeta, abstractmethod
import torch
from .sampling_result import SamplingResult
class BaseSampler(metaclass=ABCMeta):
def __init__(self,
num,
pos_fraction,
neg_pos_ub=-1,
add_gt_as_proposals=True,
**kwargs):
self.num = num
self.pos_fraction = pos_fraction
self.neg_pos_ub = neg_pos_ub
self.add_gt_as_proposals = add_gt_as_proposals
self.pos_sampler = self
self.neg_sampler = self
@abstractmethod
def _sample_pos(self, assign_result, num_expected, **kwargs):
pass
@abstractmethod
def _sample_neg(self, assign_result, num_expected, **kwargs):
pass
def sample(self,
assign_result,
bboxes,
gt_bboxes,
gt_labels=None,
**kwargs):
"""Sample positive and negative bboxes.
This is a simple implementation of bbox sampling given candidates,
assigning results and ground truth bboxes.
Args:
assign_result (:obj:`AssignResult`): Bbox assigning results.
bboxes (Tensor): Boxes to be sampled from.
gt_bboxes (Tensor): Ground truth bboxes.
gt_labels (Tensor, optional): Class labels of ground truth bboxes.
Returns:
:obj:`SamplingResult`: Sampling result.
"""
gt_bboxes = gt_bboxes.to(bboxes)
if len(bboxes.shape) < 2:
bboxes = bboxes[None, :]
bboxes = bboxes[:, :4]
gt_flags = bboxes.new_zeros((bboxes.shape[0], ), dtype=torch.uint8)
if self.add_gt_as_proposals:
bboxes = torch.cat([gt_bboxes, bboxes], dim=0)
assign_result.add_gt_(gt_labels)
gt_ones = bboxes.new_ones(gt_bboxes.shape[0], dtype=torch.uint8)
gt_flags = torch.cat([gt_ones, gt_flags])
num_expected_pos = int(self.num * self.pos_fraction)
pos_inds = self.pos_sampler._sample_pos(
assign_result, num_expected_pos, bboxes=bboxes, **kwargs)
# We found that sampled indices have duplicated items occasionally.
# (may be a bug of PyTorch)
pos_inds = pos_inds.unique()
num_sampled_pos = pos_inds.numel()
num_expected_neg = self.num - num_sampled_pos
# print('Pos:{} Neg:{}'.format(num_sampled_pos,num_expected_neg))
if self.neg_pos_ub >= 0:
_pos = max(1, num_sampled_pos)
neg_upper_bound = int(self.neg_pos_ub * _pos)
if num_expected_neg > neg_upper_bound:
num_expected_neg = neg_upper_bound
neg_inds = self.neg_sampler._sample_neg(
assign_result, num_expected_neg, bboxes=bboxes, **kwargs)
neg_inds = neg_inds.unique()
return SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags)
| 2,942
| 33.22093
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/random_sampler.py
|
import numpy as np
import torch
from ..builder import BBOX_SAMPLERS
from .base_sampler import BaseSampler
@BBOX_SAMPLERS.register_module
class RandomSampler(BaseSampler):
def __init__(self,
num,
pos_fraction,
neg_pos_ub=-1,
add_gt_as_proposals=True,
**kwargs):
super(RandomSampler, self).__init__(num, pos_fraction, neg_pos_ub,
add_gt_as_proposals)
@staticmethod
def random_choice(gallery, num):
"""Random select some elements from the gallery.
It seems that Pytorch's implementation is slower than numpy so we use
numpy to randperm the indices.
"""
assert len(gallery) >= num
if isinstance(gallery, list):
gallery = np.array(gallery)
cands = np.arange(len(gallery))
np.random.shuffle(cands)
rand_inds = cands[:num]
if not isinstance(gallery, np.ndarray):
rand_inds = torch.from_numpy(rand_inds).long().to(gallery.device)
return gallery[rand_inds]
def _sample_pos(self, assign_result, num_expected, **kwargs):
"""Randomly sample some positive samples."""
pos_inds = torch.nonzero(assign_result.gt_inds > 0)
if pos_inds.numel() != 0:
pos_inds = pos_inds.squeeze(1)
if pos_inds.numel() <= num_expected:
return pos_inds
else:
return self.random_choice(pos_inds, num_expected)
def _sample_neg(self, assign_result, num_expected, **kwargs):
"""Randomly sample some negative samples."""
neg_inds = torch.nonzero(assign_result.gt_inds == 0)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
return self.random_choice(neg_inds, num_expected)
| 1,924
| 34
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/ohem_sampler.py
|
import torch
from ..transforms import bbox2roi
from .base_sampler import BaseSampler
class OHEMSampler(BaseSampler):
"""
Online Hard Example Mining Sampler described in [1]_.
References:
.. [1] https://arxiv.org/pdf/1604.03540.pdf
"""
def __init__(self,
num,
pos_fraction,
context,
neg_pos_ub=-1,
add_gt_as_proposals=True,
**kwargs):
super(OHEMSampler, self).__init__(num, pos_fraction, neg_pos_ub,
add_gt_as_proposals)
if not hasattr(context, 'num_stages'):
self.bbox_roi_extractor = context.bbox_roi_extractor
self.bbox_head = context.bbox_head
else:
self.bbox_roi_extractor = context.bbox_roi_extractor[
context.current_stage]
self.bbox_head = context.bbox_head[context.current_stage]
def hard_mining(self, inds, num_expected, bboxes, labels, feats):
with torch.no_grad():
rois = bbox2roi([bboxes])
bbox_feats = self.bbox_roi_extractor(
feats[:self.bbox_roi_extractor.num_inputs], rois)
cls_score, _ = self.bbox_head(bbox_feats)
loss = self.bbox_head.loss(
cls_score=cls_score,
bbox_pred=None,
labels=labels,
label_weights=cls_score.new_ones(cls_score.size(0)),
bbox_targets=None,
bbox_weights=None,
reduction_override='none')['loss_cls']
_, topk_loss_inds = loss.topk(num_expected)
return inds[topk_loss_inds]
def _sample_pos(self,
assign_result,
num_expected,
bboxes=None,
feats=None,
**kwargs):
# Sample some hard positive samples
pos_inds = torch.nonzero(assign_result.gt_inds > 0)
if pos_inds.numel() != 0:
pos_inds = pos_inds.squeeze(1)
if pos_inds.numel() <= num_expected:
return pos_inds
else:
return self.hard_mining(pos_inds, num_expected, bboxes[pos_inds],
assign_result.labels[pos_inds], feats)
def _sample_neg(self,
assign_result,
num_expected,
bboxes=None,
feats=None,
**kwargs):
# Sample some hard negative samples
neg_inds = torch.nonzero(assign_result.gt_inds == 0)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
return self.hard_mining(neg_inds, num_expected, bboxes[neg_inds],
assign_result.labels[neg_inds], feats)
| 2,912
| 35.4125
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/iou_balanced_neg_sampler.py
|
import numpy as np
import torch
from .random_sampler import RandomSampler
class IoUBalancedNegSampler(RandomSampler):
"""IoU Balanced Sampling
arXiv: https://arxiv.org/pdf/1904.02701.pdf (CVPR 2019)
Sampling proposals according to their IoU. `floor_fraction` of needed RoIs
are sampled from proposals whose IoU are lower than `floor_thr` randomly.
The others are sampled from proposals whose IoU are higher than
`floor_thr`. These proposals are sampled from some bins evenly, which are
split by `num_bins` via IoU evenly.
Args:
num (int): number of proposals.
pos_fraction (float): fraction of positive proposals.
floor_thr (float): threshold (minimum) IoU for IoU balanced sampling,
set to -1 if all using IoU balanced sampling.
floor_fraction (float): sampling fraction of proposals under floor_thr.
num_bins (int): number of bins in IoU balanced sampling.
"""
def __init__(self,
num,
pos_fraction,
floor_thr=-1,
floor_fraction=0,
num_bins=3,
**kwargs):
super(IoUBalancedNegSampler, self).__init__(num, pos_fraction,
**kwargs)
assert floor_thr >= 0 or floor_thr == -1
assert 0 <= floor_fraction <= 1
assert num_bins >= 1
self.floor_thr = floor_thr
self.floor_fraction = floor_fraction
self.num_bins = num_bins
def sample_via_interval(self, max_overlaps, full_set, num_expected):
max_iou = max_overlaps.max()
iou_interval = (max_iou - self.floor_thr) / self.num_bins
per_num_expected = int(num_expected / self.num_bins)
sampled_inds = []
for i in range(self.num_bins):
start_iou = self.floor_thr + i * iou_interval
end_iou = self.floor_thr + (i + 1) * iou_interval
tmp_set = set(
np.where(
np.logical_and(max_overlaps >= start_iou,
max_overlaps < end_iou))[0])
tmp_inds = list(tmp_set & full_set)
if len(tmp_inds) > per_num_expected:
tmp_sampled_set = self.random_choice(tmp_inds,
per_num_expected)
else:
tmp_sampled_set = np.array(tmp_inds, dtype=np.int)
sampled_inds.append(tmp_sampled_set)
sampled_inds = np.concatenate(sampled_inds)
if len(sampled_inds) < num_expected:
num_extra = num_expected - len(sampled_inds)
extra_inds = np.array(list(full_set - set(sampled_inds)))
if len(extra_inds) > num_extra:
extra_inds = self.random_choice(extra_inds, num_extra)
sampled_inds = np.concatenate([sampled_inds, extra_inds])
return sampled_inds
def _sample_neg(self, assign_result, num_expected, **kwargs):
neg_inds = torch.nonzero(assign_result.gt_inds == 0)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
max_overlaps = assign_result.max_overlaps.cpu().numpy()
# balance sampling for negative samples
neg_set = set(neg_inds.cpu().numpy())
if self.floor_thr > 0:
floor_set = set(
np.where(
np.logical_and(max_overlaps >= 0,
max_overlaps < self.floor_thr))[0])
iou_sampling_set = set(
np.where(max_overlaps >= self.floor_thr)[0])
elif self.floor_thr == 0:
floor_set = set(np.where(max_overlaps == 0)[0])
iou_sampling_set = set(
np.where(max_overlaps > self.floor_thr)[0])
else:
floor_set = set()
iou_sampling_set = set(
np.where(max_overlaps > self.floor_thr)[0])
floor_neg_inds = list(floor_set & neg_set)
iou_sampling_neg_inds = list(iou_sampling_set & neg_set)
num_expected_iou_sampling = int(num_expected *
(1 - self.floor_fraction))
if len(iou_sampling_neg_inds) > num_expected_iou_sampling:
if self.num_bins >= 2:
iou_sampled_inds = self.sample_via_interval(
max_overlaps, set(iou_sampling_neg_inds),
num_expected_iou_sampling)
else:
iou_sampled_inds = self.random_choice(
iou_sampling_neg_inds, num_expected_iou_sampling)
else:
iou_sampled_inds = np.array(
iou_sampling_neg_inds, dtype=np.int)
num_expected_floor = num_expected - len(iou_sampled_inds)
if len(floor_neg_inds) > num_expected_floor:
sampled_floor_inds = self.random_choice(
floor_neg_inds, num_expected_floor)
else:
sampled_floor_inds = np.array(floor_neg_inds, dtype=np.int)
sampled_inds = np.concatenate(
(sampled_floor_inds, iou_sampled_inds))
if len(sampled_inds) < num_expected:
num_extra = num_expected - len(sampled_inds)
extra_inds = np.array(list(neg_set - set(sampled_inds)))
if len(extra_inds) > num_extra:
extra_inds = self.random_choice(extra_inds, num_extra)
sampled_inds = np.concatenate((sampled_inds, extra_inds))
sampled_inds = torch.from_numpy(sampled_inds).long().to(
assign_result.gt_inds.device)
return sampled_inds
| 5,869
| 42.80597
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/random_sampler_rotated.py
|
import torch
from .random_sampler import RandomSampler
from .sampling_result import SamplingResult
from ..builder import BBOX_SAMPLERS
@BBOX_SAMPLERS.register_module
class RandomSamplerRotated(RandomSampler):
def sample(self,
assign_result,
bboxes,
gt_bboxes,
gt_labels=None,
**kwargs):
gt_bboxes = gt_bboxes.float()
bboxes = bboxes.float()
if len(bboxes.shape) < 2:
bboxes = bboxes[None, :]
# this is the only difference between RandomSamplerRotated and RandomSampler
bboxes = bboxes[:, :5]
gt_flags = bboxes.new_zeros((bboxes.shape[0],), dtype=torch.uint8)
if self.add_gt_as_proposals:
bboxes = torch.cat([gt_bboxes, bboxes], dim=0)
assign_result.add_gt_(gt_labels)
gt_ones = bboxes.new_ones(gt_bboxes.shape[0], dtype=torch.uint8)
gt_flags = torch.cat([gt_ones, gt_flags])
num_expected_pos = int(self.num * self.pos_fraction)
pos_inds = self.pos_sampler._sample_pos(
assign_result, num_expected_pos, bboxes=bboxes, **kwargs)
# We found that sampled indices have duplicated items occasionally.
# (may be a bug of PyTorch)
pos_inds = pos_inds.unique()
num_sampled_pos = pos_inds.numel()
num_expected_neg = self.num - num_sampled_pos
# print('Pos:{} Neg:{}'.format(num_sampled_pos,num_expected_neg))
if self.neg_pos_ub >= 0:
_pos = max(1, num_sampled_pos)
neg_upper_bound = int(self.neg_pos_ub * _pos)
if num_expected_neg > neg_upper_bound:
num_expected_neg = neg_upper_bound
neg_inds = self.neg_sampler._sample_neg(
assign_result, num_expected_neg, bboxes=bboxes, **kwargs)
neg_inds = neg_inds.unique()
return SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags)
| 1,997
| 35.327273
| 84
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/__init__.py
|
from .base_sampler import BaseSampler
from .combined_sampler import CombinedSampler
from .instance_balanced_pos_sampler import InstanceBalancedPosSampler
from .iou_balanced_neg_sampler import IoUBalancedNegSampler
from .ohem_sampler import OHEMSampler
from .pseudo_sampler import PseudoSampler
from .random_sampler import RandomSampler
from .random_sampler_rotated import RandomSamplerRotated
from .sampling_result import SamplingResult
__all__ = [
'BaseSampler', 'PseudoSampler', 'RandomSampler',
'InstanceBalancedPosSampler', 'IoUBalancedNegSampler', 'CombinedSampler',
'OHEMSampler', 'SamplingResult', 'RandomSamplerRotated'
]
| 643
| 39.25
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/sampling_result.py
|
import torch
class SamplingResult(object):
def __init__(self, pos_inds, neg_inds, bboxes, gt_bboxes, assign_result,
gt_flags):
self.pos_inds = pos_inds
self.neg_inds = neg_inds
self.pos_bboxes = bboxes[pos_inds]
self.neg_bboxes = bboxes[neg_inds]
self.pos_is_gt = gt_flags[pos_inds]
self.num_gts = gt_bboxes.shape[0]
self.pos_assigned_gt_inds = assign_result.gt_inds[pos_inds] - 1
self.pos_gt_bboxes = gt_bboxes[self.pos_assigned_gt_inds, :]
if assign_result.labels is not None:
self.pos_gt_labels = assign_result.labels[pos_inds]
else:
self.pos_gt_labels = None
@property
def bboxes(self):
return torch.cat([self.pos_bboxes, self.neg_bboxes])
| 790
| 30.64
| 76
|
py
|
s2anet
|
s2anet-master/mmdet/core/bbox/samplers/pseudo_sampler.py
|
import torch
from .base_sampler import BaseSampler
from .sampling_result import SamplingResult
class PseudoSampler(BaseSampler):
def __init__(self, **kwargs):
pass
def _sample_pos(self, **kwargs):
raise NotImplementedError
def _sample_neg(self, **kwargs):
raise NotImplementedError
def sample(self, assign_result, bboxes, gt_bboxes, **kwargs):
pos_inds = torch.nonzero(
assign_result.gt_inds > 0).squeeze(-1).unique()
neg_inds = torch.nonzero(
assign_result.gt_inds == 0).squeeze(-1).unique()
gt_flags = bboxes.new_zeros(bboxes.shape[0], dtype=torch.uint8)
sampling_result = SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags)
return sampling_result
| 829
| 29.740741
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/core/utils/dist_utils.py
|
from collections import OrderedDict
import torch.distributed as dist
from mmcv.runner import OptimizerHook
from torch._utils import (_flatten_dense_tensors, _take_tensors,
_unflatten_dense_tensors)
def _allreduce_coalesced(tensors, world_size, bucket_size_mb=-1):
if bucket_size_mb > 0:
bucket_size_bytes = bucket_size_mb * 1024 * 1024
buckets = _take_tensors(tensors, bucket_size_bytes)
else:
buckets = OrderedDict()
for tensor in tensors:
tp = tensor.type()
if tp not in buckets:
buckets[tp] = []
buckets[tp].append(tensor)
buckets = buckets.values()
for bucket in buckets:
flat_tensors = _flatten_dense_tensors(bucket)
dist.all_reduce(flat_tensors)
flat_tensors.div_(world_size)
for tensor, synced in zip(
bucket, _unflatten_dense_tensors(flat_tensors, bucket)):
tensor.copy_(synced)
def allreduce_grads(params, coalesce=True, bucket_size_mb=-1):
grads = [
param.grad.data for param in params
if param.requires_grad and param.grad is not None
]
world_size = dist.get_world_size()
if coalesce:
_allreduce_coalesced(grads, world_size, bucket_size_mb)
else:
for tensor in grads:
dist.all_reduce(tensor.div_(world_size))
class DistOptimizerHook(OptimizerHook):
def __init__(self, grad_clip=None, coalesce=True, bucket_size_mb=-1):
self.grad_clip = grad_clip
self.coalesce = coalesce
self.bucket_size_mb = bucket_size_mb
def after_train_iter(self, runner):
runner.optimizer.zero_grad()
runner.outputs['loss'].backward()
allreduce_grads(runner.model.parameters(), self.coalesce,
self.bucket_size_mb)
if self.grad_clip is not None:
self.clip_grads(runner.model.parameters())
runner.optimizer.step()
| 1,967
| 32.355932
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/core/utils/misc.py
|
from functools import partial
import mmcv
import numpy as np
from six.moves import map, zip
def tensor2imgs(tensor, mean=(0, 0, 0), std=(1, 1, 1), to_rgb=True):
num_imgs = tensor.size(0)
mean = np.array(mean, dtype=np.float32)
std = np.array(std, dtype=np.float32)
imgs = []
for img_id in range(num_imgs):
img = tensor[img_id, ...].cpu().numpy().transpose(1, 2, 0)
img = mmcv.imdenormalize(
img, mean, std, to_bgr=to_rgb).astype(np.uint8)
imgs.append(np.ascontiguousarray(img))
return imgs
def multi_apply(func, *args, **kwargs):
pfunc = partial(func, **kwargs) if kwargs else func
map_results = map(pfunc, *args)
return tuple(map(list, zip(*map_results)))
def unmap(data, count, inds, fill=0):
""" Unmap a subset of item (data) back to the original set of items (of
size count) """
if data.dim() == 1:
ret = data.new_full((count, ), fill)
ret[inds] = data
else:
new_size = (count, ) + data.size()[1:]
ret = data.new_full(new_size, fill)
ret[inds, :] = data
return ret
| 1,108
| 28.184211
| 75
|
py
|
s2anet
|
s2anet-master/mmdet/core/utils/__init__.py
|
from .dist_utils import DistOptimizerHook, allreduce_grads
from .misc import multi_apply, tensor2imgs, unmap
__all__ = [
'allreduce_grads', 'DistOptimizerHook', 'tensor2imgs', 'unmap',
'multi_apply'
]
| 210
| 25.375
| 67
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/anchor_target.py
|
import torch
from ..bbox import PseudoSampler, assign_and_sample, build_assigner, build_bbox_coder
from ..utils import multi_apply
def anchor_target(anchor_list,
valid_flag_list,
gt_bboxes_list,
img_metas,
target_means,
target_stds,
cfg,
gt_bboxes_ignore_list=None,
gt_labels_list=None,
label_channels=1,
sampling=True,
unmap_outputs=True):
"""Compute regression and classification targets for anchors.
Args:
anchor_list (list[list]): Multi level anchors of each image.
valid_flag_list (list[list]): Multi level valid flags of each image.
gt_bboxes_list (list[Tensor]): Ground truth bboxes of each image.
img_metas (list[dict]): Meta info of each image.
target_means (Iterable): Mean value of regression targets.
target_stds (Iterable): Std value of regression targets.
cfg (dict): RPN train configs.
Returns:
tuple
"""
num_imgs = len(img_metas)
assert len(anchor_list) == len(valid_flag_list) == num_imgs
# anchor number of multi levels
num_level_anchors = [anchors.size(0) for anchors in anchor_list[0]]
# concat all level anchors and flags to a single tensor
for i in range(num_imgs):
assert len(anchor_list[i]) == len(valid_flag_list[i])
anchor_list[i] = torch.cat(anchor_list[i])
valid_flag_list[i] = torch.cat(valid_flag_list[i])
# compute targets for each image
if gt_bboxes_ignore_list is None:
gt_bboxes_ignore_list = [None for _ in range(num_imgs)]
if gt_labels_list is None:
gt_labels_list = [None for _ in range(num_imgs)]
(all_labels, all_label_weights, all_bbox_targets, all_bbox_weights,
pos_inds_list, neg_inds_list) = multi_apply(
anchor_target_single,
anchor_list,
valid_flag_list,
gt_bboxes_list,
gt_bboxes_ignore_list,
gt_labels_list,
img_metas,
target_means=target_means,
target_stds=target_stds,
cfg=cfg,
label_channels=label_channels,
sampling=sampling,
unmap_outputs=unmap_outputs)
# no valid anchors
if any([labels is None for labels in all_labels]):
return None
# sampled anchors of all images
num_total_pos = sum([max(inds.numel(), 1) for inds in pos_inds_list])
num_total_neg = sum([max(inds.numel(), 1) for inds in neg_inds_list])
# split targets to a list w.r.t. multiple levels
labels_list = images_to_levels(all_labels, num_level_anchors)
label_weights_list = images_to_levels(all_label_weights, num_level_anchors)
bbox_targets_list = images_to_levels(all_bbox_targets, num_level_anchors)
bbox_weights_list = images_to_levels(all_bbox_weights, num_level_anchors)
return (labels_list, label_weights_list, bbox_targets_list,
bbox_weights_list, num_total_pos, num_total_neg)
def images_to_levels(target, num_level_anchors):
"""Convert targets by image to targets by feature level.
[target_img0, target_img1] -> [target_level0, target_level1, ...]
"""
target = torch.stack(target, 0)
level_targets = []
start = 0
for n in num_level_anchors:
end = start + n
level_targets.append(target[:, start:end].squeeze(0))
start = end
return level_targets
def anchor_target_single(flat_anchors,
valid_flags,
gt_bboxes,
gt_bboxes_ignore,
gt_labels,
img_meta,
target_means,
target_stds,
cfg,
label_channels=1,
sampling=True,
unmap_outputs=True):
bbox_coder_cfg = cfg.get('bbox_coder', '')
if bbox_coder_cfg == '':
bbox_coder_cfg = dict(type='DeltaXYWHBBoxCoder')
bbox_coder = build_bbox_coder(bbox_coder_cfg)
# Set True to use IoULoss
reg_decoded_bbox = cfg.get('reg_decoded_bbox', False)
inside_flags = anchor_inside_flags(flat_anchors, valid_flags,
img_meta['img_shape'][:2],
cfg.allowed_border)
if not inside_flags.any():
return (None,) * 6
# assign gt and sample anchors
anchors = flat_anchors[inside_flags, :]
if sampling:
assign_result, sampling_result = assign_and_sample(
anchors, gt_bboxes, gt_bboxes_ignore, None, cfg)
else:
bbox_assigner = build_assigner(cfg.assigner)
assign_result = bbox_assigner.assign(anchors, gt_bboxes,
gt_bboxes_ignore, gt_labels)
bbox_sampler = PseudoSampler()
sampling_result = bbox_sampler.sample(assign_result, anchors,
gt_bboxes)
num_valid_anchors = anchors.shape[0]
bbox_targets = torch.zeros_like(anchors)
bbox_weights = torch.zeros_like(anchors)
labels = anchors.new_zeros(num_valid_anchors, dtype=torch.long)
label_weights = anchors.new_zeros(num_valid_anchors, dtype=torch.float)
pos_inds = sampling_result.pos_inds
neg_inds = sampling_result.neg_inds
if len(pos_inds) > 0:
if not reg_decoded_bbox:
pos_bbox_targets = bbox_coder.encode(sampling_result.pos_bboxes,
sampling_result.pos_gt_bboxes)
else:
pos_bbox_targets = sampling_result.pos_gt_bboxes
bbox_targets[pos_inds, :] = pos_bbox_targets.to(bbox_targets)
bbox_weights[pos_inds, :] = 1.0
if gt_labels is None:
labels[pos_inds] = 1
else:
labels[pos_inds] = gt_labels[sampling_result.pos_assigned_gt_inds]
if cfg.pos_weight <= 0:
label_weights[pos_inds] = 1.0
else:
label_weights[pos_inds] = cfg.pos_weight
if len(neg_inds) > 0:
label_weights[neg_inds] = 1.0
# map up to original set of anchors
if unmap_outputs:
num_total_anchors = flat_anchors.size(0)
labels = unmap(labels, num_total_anchors, inside_flags)
label_weights = unmap(label_weights, num_total_anchors, inside_flags)
bbox_targets = unmap(bbox_targets, num_total_anchors, inside_flags)
bbox_weights = unmap(bbox_weights, num_total_anchors, inside_flags)
return (labels, label_weights, bbox_targets, bbox_weights, pos_inds,
neg_inds)
# TODO for rotated box
def anchor_inside_flags(flat_anchors, valid_flags, img_shape,
allowed_border=0):
img_h, img_w = img_shape[:2]
if allowed_border >= 0:
inside_flags = valid_flags & \
(flat_anchors[:, 0] >= -allowed_border).type(torch.uint8) & \
(flat_anchors[:, 1] >= -allowed_border).type(torch.uint8) & \
(flat_anchors[:, 2] < img_w + allowed_border).type(torch.uint8) & \
(flat_anchors[:, 3] < img_h + allowed_border).type(torch.uint8)
else:
inside_flags = valid_flags
return inside_flags
def unmap(data, count, inds, fill=0):
""" Unmap a subset of item (data) back to the original set of items (of
size count) """
if data.dim() == 1:
ret = data.new_full((count,), fill)
ret[inds] = data
else:
new_size = (count,) + data.size()[1:]
ret = data.new_full(new_size, fill)
ret[inds, :] = data
return ret
| 7,680
| 37.989848
| 90
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/guided_anchor_target.py
|
import torch
from ..bbox import PseudoSampler, build_assigner, build_sampler
from ..utils import multi_apply, unmap
def calc_region(bbox, ratio, featmap_size=None):
"""Calculate a proportional bbox region.
The bbox center are fixed and the new h' and w' is h * ratio and w * ratio.
Args:
bbox (Tensor): Bboxes to calculate regions, shape (n, 4)
ratio (float): Ratio of the output region.
featmap_size (tuple): Feature map size used for clipping the boundary.
Returns:
tuple: x1, y1, x2, y2
"""
x1 = torch.round((1 - ratio) * bbox[0] + ratio * bbox[2]).long()
y1 = torch.round((1 - ratio) * bbox[1] + ratio * bbox[3]).long()
x2 = torch.round(ratio * bbox[0] + (1 - ratio) * bbox[2]).long()
y2 = torch.round(ratio * bbox[1] + (1 - ratio) * bbox[3]).long()
if featmap_size is not None:
x1 = x1.clamp(min=0, max=featmap_size[1] - 1)
y1 = y1.clamp(min=0, max=featmap_size[0] - 1)
x2 = x2.clamp(min=0, max=featmap_size[1] - 1)
y2 = y2.clamp(min=0, max=featmap_size[0] - 1)
return (x1, y1, x2, y2)
def ga_loc_target(gt_bboxes_list,
featmap_sizes,
anchor_scale,
anchor_strides,
center_ratio=0.2,
ignore_ratio=0.5):
"""Compute location targets for guided anchoring.
Each feature map is divided into positive, negative and ignore regions.
- positive regions: target 1, weight 1
- ignore regions: target 0, weight 0
- negative regions: target 0, weight 0.1
Args:
gt_bboxes_list (list[Tensor]): Gt bboxes of each image.
featmap_sizes (list[tuple]): Multi level sizes of each feature maps.
anchor_scale (int): Anchor scale.
anchor_strides ([list[int]]): Multi level anchor strides.
center_ratio (float): Ratio of center region.
ignore_ratio (float): Ratio of ignore region.
Returns:
tuple
"""
img_per_gpu = len(gt_bboxes_list)
num_lvls = len(featmap_sizes)
r1 = (1 - center_ratio) / 2
r2 = (1 - ignore_ratio) / 2
all_loc_targets = []
all_loc_weights = []
all_ignore_map = []
for lvl_id in range(num_lvls):
h, w = featmap_sizes[lvl_id]
loc_targets = torch.zeros(
img_per_gpu,
1,
h,
w,
device=gt_bboxes_list[0].device,
dtype=torch.float32)
loc_weights = torch.full_like(loc_targets, -1)
ignore_map = torch.zeros_like(loc_targets)
all_loc_targets.append(loc_targets)
all_loc_weights.append(loc_weights)
all_ignore_map.append(ignore_map)
for img_id in range(img_per_gpu):
gt_bboxes = gt_bboxes_list[img_id]
scale = torch.sqrt((gt_bboxes[:, 2] - gt_bboxes[:, 0] + 1) *
(gt_bboxes[:, 3] - gt_bboxes[:, 1] + 1))
min_anchor_size = scale.new_full(
(1, ), float(anchor_scale * anchor_strides[0]))
# assign gt bboxes to different feature levels w.r.t. their scales
target_lvls = torch.floor(
torch.log2(scale) - torch.log2(min_anchor_size) + 0.5)
target_lvls = target_lvls.clamp(min=0, max=num_lvls - 1).long()
for gt_id in range(gt_bboxes.size(0)):
lvl = target_lvls[gt_id].item()
# rescaled to corresponding feature map
gt_ = gt_bboxes[gt_id, :4] / anchor_strides[lvl]
# calculate ignore regions
ignore_x1, ignore_y1, ignore_x2, ignore_y2 = calc_region(
gt_, r2, featmap_sizes[lvl])
# calculate positive (center) regions
ctr_x1, ctr_y1, ctr_x2, ctr_y2 = calc_region(
gt_, r1, featmap_sizes[lvl])
all_loc_targets[lvl][img_id, 0, ctr_y1:ctr_y2 + 1, ctr_x1:ctr_x2 +
1] = 1
all_loc_weights[lvl][img_id, 0, ignore_y1:ignore_y2 +
1, ignore_x1:ignore_x2 + 1] = 0
all_loc_weights[lvl][img_id, 0, ctr_y1:ctr_y2 + 1, ctr_x1:ctr_x2 +
1] = 1
# calculate ignore map on nearby low level feature
if lvl > 0:
d_lvl = lvl - 1
# rescaled to corresponding feature map
gt_ = gt_bboxes[gt_id, :4] / anchor_strides[d_lvl]
ignore_x1, ignore_y1, ignore_x2, ignore_y2 = calc_region(
gt_, r2, featmap_sizes[d_lvl])
all_ignore_map[d_lvl][img_id, 0, ignore_y1:ignore_y2 +
1, ignore_x1:ignore_x2 + 1] = 1
# calculate ignore map on nearby high level feature
if lvl < num_lvls - 1:
u_lvl = lvl + 1
# rescaled to corresponding feature map
gt_ = gt_bboxes[gt_id, :4] / anchor_strides[u_lvl]
ignore_x1, ignore_y1, ignore_x2, ignore_y2 = calc_region(
gt_, r2, featmap_sizes[u_lvl])
all_ignore_map[u_lvl][img_id, 0, ignore_y1:ignore_y2 +
1, ignore_x1:ignore_x2 + 1] = 1
for lvl_id in range(num_lvls):
# ignore negative regions w.r.t. ignore map
all_loc_weights[lvl_id][(all_loc_weights[lvl_id] < 0)
& (all_ignore_map[lvl_id] > 0)] = 0
# set negative regions with weight 0.1
all_loc_weights[lvl_id][all_loc_weights[lvl_id] < 0] = 0.1
# loc average factor to balance loss
loc_avg_factor = sum(
[t.size(0) * t.size(-1) * t.size(-2) for t in all_loc_targets]) / 200
return all_loc_targets, all_loc_weights, loc_avg_factor
def ga_shape_target(approx_list,
inside_flag_list,
square_list,
gt_bboxes_list,
img_metas,
approxs_per_octave,
cfg,
gt_bboxes_ignore_list=None,
sampling=True,
unmap_outputs=True):
"""Compute guided anchoring targets.
Args:
approx_list (list[list]): Multi level approxs of each image.
inside_flag_list (list[list]): Multi level inside flags of each image.
square_list (list[list]): Multi level squares of each image.
gt_bboxes_list (list[Tensor]): Ground truth bboxes of each image.
img_metas (list[dict]): Meta info of each image.
approxs_per_octave (int): number of approxs per octave
cfg (dict): RPN train configs.
gt_bboxes_ignore_list (list[Tensor]): ignore list of gt bboxes.
sampling (bool): sampling or not.
unmap_outputs (bool): unmap outputs or not.
Returns:
tuple
"""
num_imgs = len(img_metas)
assert len(approx_list) == len(inside_flag_list) == len(
square_list) == num_imgs
# anchor number of multi levels
num_level_squares = [squares.size(0) for squares in square_list[0]]
# concat all level anchors and flags to a single tensor
inside_flag_flat_list = []
approx_flat_list = []
square_flat_list = []
for i in range(num_imgs):
assert len(square_list[i]) == len(inside_flag_list[i])
inside_flag_flat_list.append(torch.cat(inside_flag_list[i]))
approx_flat_list.append(torch.cat(approx_list[i]))
square_flat_list.append(torch.cat(square_list[i]))
# compute targets for each image
if gt_bboxes_ignore_list is None:
gt_bboxes_ignore_list = [None for _ in range(num_imgs)]
(all_bbox_anchors, all_bbox_gts, all_bbox_weights, pos_inds_list,
neg_inds_list) = multi_apply(
ga_shape_target_single,
approx_flat_list,
inside_flag_flat_list,
square_flat_list,
gt_bboxes_list,
gt_bboxes_ignore_list,
img_metas,
approxs_per_octave=approxs_per_octave,
cfg=cfg,
sampling=sampling,
unmap_outputs=unmap_outputs)
# no valid anchors
if any([bbox_anchors is None for bbox_anchors in all_bbox_anchors]):
return None
# sampled anchors of all images
num_total_pos = sum([max(inds.numel(), 1) for inds in pos_inds_list])
num_total_neg = sum([max(inds.numel(), 1) for inds in neg_inds_list])
# split targets to a list w.r.t. multiple levels
bbox_anchors_list = images_to_levels(all_bbox_anchors, num_level_squares)
bbox_gts_list = images_to_levels(all_bbox_gts, num_level_squares)
bbox_weights_list = images_to_levels(all_bbox_weights, num_level_squares)
return (bbox_anchors_list, bbox_gts_list, bbox_weights_list, num_total_pos,
num_total_neg)
def images_to_levels(target, num_level_anchors):
"""Convert targets by image to targets by feature level.
[target_img0, target_img1] -> [target_level0, target_level1, ...]
"""
target = torch.stack(target, 0)
level_targets = []
start = 0
for n in num_level_anchors:
end = start + n
level_targets.append(target[:, start:end].squeeze(0))
start = end
return level_targets
def ga_shape_target_single(flat_approxs,
inside_flags,
flat_squares,
gt_bboxes,
gt_bboxes_ignore,
img_meta,
approxs_per_octave,
cfg,
sampling=True,
unmap_outputs=True):
"""Compute guided anchoring targets.
This function returns sampled anchors and gt bboxes directly
rather than calculates regression targets.
Args:
flat_approxs (Tensor): flat approxs of a single image,
shape (n, 4)
inside_flags (Tensor): inside flags of a single image,
shape (n, ).
flat_squares (Tensor): flat squares of a single image,
shape (approxs_per_octave * n, 4)
gt_bboxes (Tensor): Ground truth bboxes of a single image.
img_meta (dict): Meta info of a single image.
approxs_per_octave (int): number of approxs per octave
cfg (dict): RPN train configs.
sampling (bool): sampling or not.
unmap_outputs (bool): unmap outputs or not.
Returns:
tuple
"""
if not inside_flags.any():
return (None, ) * 6
# assign gt and sample anchors
expand_inside_flags = inside_flags[:, None].expand(
-1, approxs_per_octave).reshape(-1)
approxs = flat_approxs[expand_inside_flags, :]
squares = flat_squares[inside_flags, :]
bbox_assigner = build_assigner(cfg.ga_assigner)
assign_result = bbox_assigner.assign(approxs, squares, approxs_per_octave,
gt_bboxes, gt_bboxes_ignore)
if sampling:
bbox_sampler = build_sampler(cfg.ga_sampler)
else:
bbox_sampler = PseudoSampler()
sampling_result = bbox_sampler.sample(assign_result, squares, gt_bboxes)
bbox_anchors = torch.zeros_like(squares)
bbox_gts = torch.zeros_like(squares)
bbox_weights = torch.zeros_like(squares)
pos_inds = sampling_result.pos_inds
neg_inds = sampling_result.neg_inds
if len(pos_inds) > 0:
bbox_anchors[pos_inds, :] = sampling_result.pos_bboxes
bbox_gts[pos_inds, :] = sampling_result.pos_gt_bboxes
bbox_weights[pos_inds, :] = 1.0
# map up to original set of anchors
if unmap_outputs:
num_total_anchors = flat_squares.size(0)
bbox_anchors = unmap(bbox_anchors, num_total_anchors, inside_flags)
bbox_gts = unmap(bbox_gts, num_total_anchors, inside_flags)
bbox_weights = unmap(bbox_weights, num_total_anchors, inside_flags)
return (bbox_anchors, bbox_gts, bbox_weights, pos_inds, neg_inds)
| 11,809
| 40.006944
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/point_generator.py
|
import torch
class PointGenerator(object):
def _meshgrid(self, x, y, row_major=True):
xx = x.repeat(len(y))
yy = y.view(-1, 1).repeat(1, len(x)).view(-1)
if row_major:
return xx, yy
else:
return yy, xx
def grid_points(self, featmap_size, stride=16, device='cuda'):
feat_h, feat_w = featmap_size
shift_x = torch.arange(0., feat_w, device=device) * stride
shift_y = torch.arange(0., feat_h, device=device) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
stride = shift_x.new_full((shift_xx.shape[0], ), stride)
shifts = torch.stack([shift_xx, shift_yy, stride], dim=-1)
all_points = shifts.to(device)
return all_points
def valid_flags(self, featmap_size, valid_size, device='cuda'):
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.uint8, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.uint8, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
return valid
| 1,287
| 35.8
| 71
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/anchor_generator.py
|
import torch
class AnchorGenerator(object):
"""
Examples:
>>> from mmdet.core import AnchorGenerator
>>> self = AnchorGenerator(9, [1.], [1.])
>>> all_anchors = self.grid_anchors((2, 2), device='cpu')
>>> print(all_anchors)
tensor([[ 0., 0., 8., 8.],
[16., 0., 24., 8.],
[ 0., 16., 8., 24.],
[16., 16., 24., 24.]])
"""
def __init__(self, base_size, scales, ratios, scale_major=True, ctr=None):
self.base_size = base_size
self.scales = torch.Tensor(scales)
self.ratios = torch.Tensor(ratios)
self.scale_major = scale_major
self.ctr = ctr
self.base_anchors = self.gen_base_anchors()
@property
def num_base_anchors(self):
return self.base_anchors.size(0)
def gen_base_anchors(self):
w = self.base_size
h = self.base_size
if self.ctr is None:
x_ctr = 0.5 * (w - 1)
y_ctr = 0.5 * (h - 1)
else:
x_ctr, y_ctr = self.ctr
h_ratios = torch.sqrt(self.ratios)
w_ratios = 1 / h_ratios
if self.scale_major:
ws = (w * w_ratios[:, None] * self.scales[None, :]).view(-1)
hs = (h * h_ratios[:, None] * self.scales[None, :]).view(-1)
else:
ws = (w * self.scales[:, None] * w_ratios[None, :]).view(-1)
hs = (h * self.scales[:, None] * h_ratios[None, :]).view(-1)
# yapf: disable
base_anchors = torch.stack(
[
x_ctr - 0.5 * (ws - 1), y_ctr - 0.5 * (hs - 1),
x_ctr + 0.5 * (ws - 1), y_ctr + 0.5 * (hs - 1)
],
dim=-1).round()
# yapf: enable
return base_anchors
def _meshgrid(self, x, y, row_major=True):
xx = x.repeat(len(y))
yy = y.view(-1, 1).repeat(1, len(x)).view(-1)
if row_major:
return xx, yy
else:
return yy, xx
def grid_anchors(self, featmap_size, stride=16, device='cuda'):
# featmap_size*stride project it to original area
base_anchors = self.base_anchors.to(device)
feat_h, feat_w = featmap_size
shift_x = torch.arange(0, feat_w, device=device) * stride
shift_y = torch.arange(0, feat_h, device=device) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shifts = torch.stack([shift_xx, shift_yy, shift_xx, shift_yy], dim=-1)
shifts = shifts.type_as(base_anchors)
# first feat_w elements correspond to the first row of shifts
# add A anchors (1, A, 4) to K shifts (K, 1, 4) to get
# shifted anchors (K, A, 4), reshape to (K*A, 4)
all_anchors = base_anchors[None, :, :] + shifts[:, None, :]
all_anchors = all_anchors.view(-1, 4)
# first A rows correspond to A anchors of (0, 0) in feature map,
# then (0, 1), (0, 2), ...
return all_anchors
def valid_flags(self, featmap_size, valid_size, device='cuda'):
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.uint8, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.uint8, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
valid = valid[:, None].expand(
valid.size(0), self.num_base_anchors).contiguous().view(-1)
return valid
| 3,603
| 35.40404
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/__init__.py
|
from .anchor_generator import AnchorGenerator
from .anchor_generator_rotated import AnchorGeneratorRotated
from .anchor_target import anchor_inside_flags, anchor_target, unmap, images_to_levels
from .guided_anchor_target import ga_loc_target, ga_shape_target
from .point_generator import PointGenerator
from .point_target import point_target
__all__ = [
'AnchorGenerator', 'anchor_target', 'anchor_inside_flags', 'ga_loc_target',
'ga_shape_target', 'PointGenerator', 'point_target',
'unmap', 'images_to_levels', 'AnchorGeneratorRotated'
]
| 552
| 41.538462
| 86
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/point_target.py
|
import torch
from ..bbox import PseudoSampler, assign_and_sample, build_assigner
from ..utils import multi_apply
def point_target(proposals_list,
valid_flag_list,
gt_bboxes_list,
img_metas,
cfg,
gt_bboxes_ignore_list=None,
gt_labels_list=None,
label_channels=1,
sampling=True,
unmap_outputs=True):
"""Compute corresponding GT box and classification targets for proposals.
Args:
points_list (list[list]): Multi level points of each image.
valid_flag_list (list[list]): Multi level valid flags of each image.
gt_bboxes_list (list[Tensor]): Ground truth bboxes of each image.
img_metas (list[dict]): Meta info of each image.
cfg (dict): train sample configs.
Returns:
tuple
"""
num_imgs = len(img_metas)
assert len(proposals_list) == len(valid_flag_list) == num_imgs
# points number of multi levels
num_level_proposals = [points.size(0) for points in proposals_list[0]]
# concat all level points and flags to a single tensor
for i in range(num_imgs):
assert len(proposals_list[i]) == len(valid_flag_list[i])
proposals_list[i] = torch.cat(proposals_list[i])
valid_flag_list[i] = torch.cat(valid_flag_list[i])
# compute targets for each image
if gt_bboxes_ignore_list is None:
gt_bboxes_ignore_list = [None for _ in range(num_imgs)]
if gt_labels_list is None:
gt_labels_list = [None for _ in range(num_imgs)]
(all_labels, all_label_weights, all_bbox_gt, all_proposals,
all_proposal_weights, pos_inds_list, neg_inds_list) = multi_apply(
point_target_single,
proposals_list,
valid_flag_list,
gt_bboxes_list,
gt_bboxes_ignore_list,
gt_labels_list,
cfg=cfg,
label_channels=label_channels,
sampling=sampling,
unmap_outputs=unmap_outputs)
# no valid points
if any([labels is None for labels in all_labels]):
return None
# sampled points of all images
num_total_pos = sum([max(inds.numel(), 1) for inds in pos_inds_list])
num_total_neg = sum([max(inds.numel(), 1) for inds in neg_inds_list])
labels_list = images_to_levels(all_labels, num_level_proposals)
label_weights_list = images_to_levels(all_label_weights,
num_level_proposals)
bbox_gt_list = images_to_levels(all_bbox_gt, num_level_proposals)
proposals_list = images_to_levels(all_proposals, num_level_proposals)
proposal_weights_list = images_to_levels(all_proposal_weights,
num_level_proposals)
return (labels_list, label_weights_list, bbox_gt_list, proposals_list,
proposal_weights_list, num_total_pos, num_total_neg)
def images_to_levels(target, num_level_grids):
"""Convert targets by image to targets by feature level.
[target_img0, target_img1] -> [target_level0, target_level1, ...]
"""
target = torch.stack(target, 0)
level_targets = []
start = 0
for n in num_level_grids:
end = start + n
level_targets.append(target[:, start:end].squeeze(0))
start = end
return level_targets
def point_target_single(flat_proposals,
valid_flags,
gt_bboxes,
gt_bboxes_ignore,
gt_labels,
cfg,
label_channels=1,
sampling=True,
unmap_outputs=True):
inside_flags = valid_flags
if not inside_flags.any():
return (None, ) * 7
# assign gt and sample proposals
proposals = flat_proposals[inside_flags, :]
if sampling:
assign_result, sampling_result = assign_and_sample(
proposals, gt_bboxes, gt_bboxes_ignore, None, cfg)
else:
bbox_assigner = build_assigner(cfg.assigner)
assign_result = bbox_assigner.assign(proposals, gt_bboxes,
gt_bboxes_ignore, gt_labels)
bbox_sampler = PseudoSampler()
sampling_result = bbox_sampler.sample(assign_result, proposals,
gt_bboxes)
num_valid_proposals = proposals.shape[0]
bbox_gt = proposals.new_zeros([num_valid_proposals, 4])
pos_proposals = torch.zeros_like(proposals)
proposals_weights = proposals.new_zeros([num_valid_proposals, 4])
labels = proposals.new_zeros(num_valid_proposals, dtype=torch.long)
label_weights = proposals.new_zeros(num_valid_proposals, dtype=torch.float)
pos_inds = sampling_result.pos_inds
neg_inds = sampling_result.neg_inds
if len(pos_inds) > 0:
pos_gt_bboxes = sampling_result.pos_gt_bboxes
bbox_gt[pos_inds, :] = pos_gt_bboxes
pos_proposals[pos_inds, :] = proposals[pos_inds, :]
proposals_weights[pos_inds, :] = 1.0
if gt_labels is None:
labels[pos_inds] = 1
else:
labels[pos_inds] = gt_labels[sampling_result.pos_assigned_gt_inds]
if cfg.pos_weight <= 0:
label_weights[pos_inds] = 1.0
else:
label_weights[pos_inds] = cfg.pos_weight
if len(neg_inds) > 0:
label_weights[neg_inds] = 1.0
# map up to original set of proposals
if unmap_outputs:
num_total_proposals = flat_proposals.size(0)
labels = unmap(labels, num_total_proposals, inside_flags)
label_weights = unmap(label_weights, num_total_proposals, inside_flags)
bbox_gt = unmap(bbox_gt, num_total_proposals, inside_flags)
pos_proposals = unmap(pos_proposals, num_total_proposals, inside_flags)
proposals_weights = unmap(proposals_weights, num_total_proposals,
inside_flags)
return (labels, label_weights, bbox_gt, pos_proposals, proposals_weights,
pos_inds, neg_inds)
def unmap(data, count, inds, fill=0):
""" Unmap a subset of item (data) back to the original set of items (of
size count) """
if data.dim() == 1:
ret = data.new_full((count, ), fill)
ret[inds] = data
else:
new_size = (count, ) + data.size()[1:]
ret = data.new_full(new_size, fill)
ret[inds, :] = data
return ret
| 6,441
| 37.807229
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/core/anchor/anchor_generator_rotated.py
|
import torch
class AnchorGeneratorRotated(object):
def __init__(self, base_size, scales, ratios, angles=[0,],scale_major=True, ctr=None):
self.base_size = base_size
self.scales = torch.Tensor(scales)
self.ratios = torch.Tensor(ratios)
self.angles = torch.Tensor(angles)
self.scale_major = scale_major
self.ctr = ctr
self.base_anchors = self.gen_base_anchors()
@property
def num_base_anchors(self):
return self.base_anchors.size(0)
def gen_base_anchors(self):
w = self.base_size
h = self.base_size
if self.ctr is None:
x_ctr = 0.5 * (w - 1)
y_ctr = 0.5 * (h - 1)
else:
x_ctr, y_ctr = self.ctr
h_ratios = torch.sqrt(self.ratios)
w_ratios = 1 / h_ratios
assert self.scale_major, "AnchorGeneratorRotated only support scale-major anchors!"
ws = (w * w_ratios[:, None, None] * self.scales[None, :, None] *
torch.ones_like(self.angles)[None, None, :]).view(-1)
hs = (h * h_ratios[:, None, None] * self.scales[None, :, None] *
torch.ones_like(self.angles)[None, None, :]).view(-1)
angles = self.angles.repeat(len(self.scales) * len(self.ratios))
# use float anchor and the anchor's center is aligned with the
# pixel center
x_ctr += torch.zeros_like(ws)
y_ctr += torch.zeros_like(ws)
base_anchors = torch.stack(
[x_ctr, y_ctr, ws, hs, angles], dim=-1)
return base_anchors
def _meshgrid(self, x, y, row_major=True):
xx = x.repeat(len(y))
yy = y.view(-1, 1).repeat(1, len(x)).view(-1)
if row_major:
return xx, yy
else:
return yy, xx
def grid_anchors(self, featmap_size, stride=16, device='cuda'):
# featmap_size*stride project it to original area
base_anchors = self.base_anchors.to(device)
feat_h, feat_w = featmap_size
shift_x = torch.arange(0, feat_w, device=device) * stride
shift_y = torch.arange(0, feat_h, device=device) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shift_others = torch.zeros_like(shift_xx)
shifts = torch.stack(
[shift_xx, shift_yy, shift_others, shift_others, shift_others], dim=-1)
shifts = shifts.type_as(base_anchors)
# first feat_w elements correspond to the first row of shifts
# add A anchors (1, A, 5) to K shifts (K, 1, 5) to get
# shifted anchors (K, A, 5), reshape to (K*A, 5)
all_anchors = base_anchors[None, :, :] + shifts[:, None, :]
all_anchors = all_anchors.view(-1, 5)
# first A rows correspond to A anchors of (0, 0) in feature map,
# then (0, 1), (0, 2), ...
return all_anchors
def valid_flags(self, featmap_size, valid_size, device='cuda'):
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.uint8, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.uint8, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
valid = valid[:, None].expand(
valid.size(0), self.num_base_anchors).contiguous().view(-1)
return valid
| 3,472
| 38.022472
| 91
|
py
|
s2anet
|
s2anet-master/mmdet/models/registry.py
|
from mmdet.utils import Registry
BACKBONES = Registry('backbone')
NECKS = Registry('neck')
ROI_EXTRACTORS = Registry('roi_extractor')
SHARED_HEADS = Registry('shared_head')
HEADS = Registry('head')
LOSSES = Registry('loss')
DETECTORS = Registry('detector')
| 258
| 24.9
| 42
|
py
|
s2anet
|
s2anet-master/mmdet/models/__init__.py
|
from .anchor_heads import * # noqa: F401,F403
from .backbones import * # noqa: F401,F403
from .bbox_heads import * # noqa: F401,F403
from .builder import (build_backbone, build_detector, build_head, build_loss,
build_neck, build_roi_extractor, build_shared_head)
from .detectors import * # noqa: F401,F403
from .losses import * # noqa: F401,F403
from .mask_heads import * # noqa: F401,F403
from .necks import * # noqa: F401,F403
from .registry import (BACKBONES, DETECTORS, HEADS, LOSSES, NECKS,
ROI_EXTRACTORS, SHARED_HEADS)
from .roi_extractors import * # noqa: F401,F403
from .shared_heads import * # noqa: F401,F403
from .bbox_heads_rotated import *
from .anchor_heads_rotated import *
__all__ = [
'BACKBONES', 'NECKS', 'ROI_EXTRACTORS', 'SHARED_HEADS', 'HEADS', 'LOSSES',
'DETECTORS', 'build_backbone', 'build_neck', 'build_roi_extractor',
'build_shared_head', 'build_head', 'build_loss', 'build_detector'
]
| 982
| 39.958333
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/builder.py
|
from torch import nn
from mmdet.utils import build_from_cfg
from .registry import (BACKBONES, DETECTORS, HEADS, LOSSES, NECKS,
ROI_EXTRACTORS, SHARED_HEADS)
def build(cfg, registry, default_args=None):
if isinstance(cfg, list):
modules = [
build_from_cfg(cfg_, registry, default_args) for cfg_ in cfg
]
return nn.Sequential(*modules)
else:
return build_from_cfg(cfg, registry, default_args)
def build_backbone(cfg):
return build(cfg, BACKBONES)
def build_neck(cfg):
return build(cfg, NECKS)
def build_roi_extractor(cfg):
return build(cfg, ROI_EXTRACTORS)
def build_shared_head(cfg):
return build(cfg, SHARED_HEADS)
def build_head(cfg):
return build(cfg, HEADS)
def build_loss(cfg):
return build(cfg, LOSSES)
def build_detector(cfg, train_cfg=None, test_cfg=None):
return build(cfg, DETECTORS, dict(train_cfg=train_cfg, test_cfg=test_cfg))
| 959
| 20.818182
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/two_stage.py
|
import torch
import torch.nn as nn
from mmdet.core import bbox2result, bbox2roi, build_assigner, build_sampler
from .. import builder
from ..registry import DETECTORS
from .base import BaseDetector
from .test_mixins import BBoxTestMixin, MaskTestMixin, RPNTestMixin
@DETECTORS.register_module
class TwoStageDetector(BaseDetector, RPNTestMixin, BBoxTestMixin,
MaskTestMixin):
"""Base class for two-stage detectors.
Two-stage detectors typically consisting of a region proposal network and a
task-specific regression head.
"""
def __init__(self,
backbone,
neck=None,
shared_head=None,
rpn_head=None,
bbox_roi_extractor=None,
bbox_head=None,
mask_roi_extractor=None,
mask_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(TwoStageDetector, self).__init__()
self.backbone = builder.build_backbone(backbone)
if neck is not None:
self.neck = builder.build_neck(neck)
if shared_head is not None:
self.shared_head = builder.build_shared_head(shared_head)
if rpn_head is not None:
self.rpn_head = builder.build_head(rpn_head)
if bbox_head is not None:
self.bbox_roi_extractor = builder.build_roi_extractor(
bbox_roi_extractor)
self.bbox_head = builder.build_head(bbox_head)
if mask_head is not None:
if mask_roi_extractor is not None:
self.mask_roi_extractor = builder.build_roi_extractor(
mask_roi_extractor)
self.share_roi_extractor = False
else:
self.share_roi_extractor = True
self.mask_roi_extractor = self.bbox_roi_extractor
self.mask_head = builder.build_head(mask_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.init_weights(pretrained=pretrained)
@property
def with_rpn(self):
return hasattr(self, 'rpn_head') and self.rpn_head is not None
def init_weights(self, pretrained=None):
super(TwoStageDetector, self).init_weights(pretrained)
self.backbone.init_weights(pretrained=pretrained)
if self.with_neck:
if isinstance(self.neck, nn.Sequential):
for m in self.neck:
m.init_weights()
else:
self.neck.init_weights()
if self.with_shared_head:
self.shared_head.init_weights(pretrained=pretrained)
if self.with_rpn:
self.rpn_head.init_weights()
if self.with_bbox:
self.bbox_roi_extractor.init_weights()
self.bbox_head.init_weights()
if self.with_mask:
self.mask_head.init_weights()
if not self.share_roi_extractor:
self.mask_roi_extractor.init_weights()
def extract_feat(self, img):
"""Directly extract features from the backbone+neck
"""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmedetection/tools/get_flops.py`
"""
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).cuda()
# bbox head
rois = bbox2roi([proposals])
if self.with_bbox:
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
outs = outs + (cls_score, bbox_pred)
# mask head
if self.with_mask:
mask_rois = rois[:100]
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head(mask_feats)
outs = outs + (mask_pred, )
return outs
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_meta (list[dict]): list of image info dict where each dict has:
'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def simple_test(self, img, img_meta, proposals=None, rescale=False):
"""Test without augmentation."""
assert self.with_bbox, "Bbox head must be implemented."
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(
x, img_meta, self.test_cfg.rpn) if proposals is None else proposals
det_bboxes, det_labels = self.simple_test_bboxes(
x, img_meta, proposal_list, self.test_cfg.rcnn, rescale=rescale)
bbox_results = bbox2result(det_bboxes, det_labels,
self.bbox_head.num_classes)
if not self.with_mask:
return bbox_results
else:
segm_results = self.simple_test_mask(
x, img_meta, det_bboxes, det_labels, rescale=rescale)
return bbox_results, segm_results
def aug_test(self, imgs, img_metas, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
# recompute feats to save memory
proposal_list = self.aug_test_rpn(
self.extract_feats(imgs), img_metas, self.test_cfg.rpn)
det_bboxes, det_labels = self.aug_test_bboxes(
self.extract_feats(imgs), img_metas, proposal_list,
self.test_cfg.rcnn)
if rescale:
_det_bboxes = det_bboxes
else:
_det_bboxes = det_bboxes.clone()
_det_bboxes[:, :4] *= img_metas[0][0]['scale_factor']
bbox_results = bbox2result(_det_bboxes, det_labels,
self.bbox_head.num_classes)
# det_bboxes always keep the original scale
if self.with_mask:
segm_results = self.aug_test_mask(
self.extract_feats(imgs), img_metas, det_bboxes, det_labels)
return bbox_results, segm_results
else:
return bbox_results
| 12,245
| 38.25
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/base.py
|
import logging
from abc import ABCMeta, abstractmethod
import mmcv
import numpy as np
import pycocotools.mask as maskUtils
import torch.nn as nn
from mmdet.core import auto_fp16, get_classes, tensor2imgs
class BaseDetector(nn.Module):
"""Base class for detectors"""
__metaclass__ = ABCMeta
def __init__(self):
super(BaseDetector, self).__init__()
self.fp16_enabled = False
@property
def with_neck(self):
return hasattr(self, 'neck') and self.neck is not None
@property
def with_shared_head(self):
return hasattr(self, 'shared_head') and self.shared_head is not None
@property
def with_bbox(self):
return hasattr(self, 'bbox_head') and self.bbox_head is not None
@property
def with_mask(self):
return hasattr(self, 'mask_head') and self.mask_head is not None
@abstractmethod
def extract_feat(self, imgs):
pass
def extract_feats(self, imgs):
assert isinstance(imgs, list)
for img in imgs:
yield self.extract_feat(img)
@abstractmethod
def forward_train(self, imgs, img_metas, **kwargs):
"""
Args:
img (list[Tensor]): list of tensors of shape (1, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has:
'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
**kwargs: specific to concrete implementation
"""
pass
@abstractmethod
def simple_test(self, img, img_meta, **kwargs):
pass
@abstractmethod
def aug_test(self, imgs, img_metas, **kwargs):
pass
def init_weights(self, pretrained=None):
if pretrained is not None:
logger = logging.getLogger()
logger.info('load model from: {}'.format(pretrained))
def forward_test(self, imgs, img_metas, **kwargs):
for var, name in [(imgs, 'imgs'), (img_metas, 'img_metas')]:
if not isinstance(var, list):
raise TypeError('{} must be a list, but got {}'.format(
name, type(var)))
num_augs = len(imgs)
if num_augs != len(img_metas):
raise ValueError(
'num of augmentations ({}) != num of image meta ({})'.format(
len(imgs), len(img_metas)))
# TODO: remove the restriction of imgs_per_gpu == 1 when prepared
imgs_per_gpu = imgs[0].size(0)
assert imgs_per_gpu == 1
if num_augs == 1:
return self.simple_test(imgs[0], img_metas[0], **kwargs)
else:
return self.aug_test(imgs, img_metas, **kwargs)
@auto_fp16(apply_to=('img', ))
def forward(self, img, img_meta, return_loss=True, **kwargs):
if return_loss:
return self.forward_train(img, img_meta, **kwargs)
else:
return self.forward_test(img, img_meta, **kwargs)
def show_result(self, data, result, dataset=None, score_thr=0.3):
if isinstance(result, tuple):
bbox_result, segm_result = result
else:
bbox_result, segm_result = result, None
img_tensor = data['img'][0]
img_metas = data['img_meta'][0].data[0]
imgs = tensor2imgs(img_tensor, **img_metas[0]['img_norm_cfg'])
assert len(imgs) == len(img_metas)
if dataset is None:
class_names = self.CLASSES
elif isinstance(dataset, str):
class_names = get_classes(dataset)
elif isinstance(dataset, (list, tuple)):
class_names = dataset
else:
raise TypeError(
'dataset must be a valid dataset name or a sequence'
' of class names, not {}'.format(type(dataset)))
for img, img_meta in zip(imgs, img_metas):
h, w, _ = img_meta['img_shape']
img_show = img[:h, :w, :]
bboxes = np.vstack(bbox_result)
# draw segmentation masks
if segm_result is not None:
segms = mmcv.concat_list(segm_result)
inds = np.where(bboxes[:, -1] > score_thr)[0]
for i in inds:
color_mask = np.random.randint(
0, 256, (1, 3), dtype=np.uint8)
mask = maskUtils.decode(segms[i]).astype(np.bool)
img_show[mask] = img_show[mask] * 0.5 + color_mask * 0.5
# draw bounding boxes
labels = [
np.full(bbox.shape[0], i, dtype=np.int32)
for i, bbox in enumerate(bbox_result)
]
labels = np.concatenate(labels)
mmcv.imshow_det_bboxes(
img_show,
bboxes,
labels,
class_names=class_names,
score_thr=score_thr)
| 5,120
| 32.690789
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/single_stage.py
|
import torch.nn as nn
from mmdet.core import bbox2result
from .. import builder
from ..registry import DETECTORS
from .base import BaseDetector
@DETECTORS.register_module
class SingleStageDetector(BaseDetector):
"""Base class for single-stage detectors.
Single-stage detectors directly and densely predict bounding boxes on the
output features of the backbone+neck.
"""
def __init__(self,
backbone,
neck=None,
bbox_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(SingleStageDetector, self).__init__()
self.backbone = builder.build_backbone(backbone)
if neck is not None:
self.neck = builder.build_neck(neck)
self.bbox_head = builder.build_head(bbox_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.init_weights(pretrained=pretrained)
def init_weights(self, pretrained=None):
super(SingleStageDetector, self).init_weights(pretrained)
self.backbone.init_weights(pretrained=pretrained)
if self.with_neck:
if isinstance(self.neck, nn.Sequential):
for m in self.neck:
m.init_weights()
else:
self.neck.init_weights()
self.bbox_head.init_weights()
def extract_feat(self, img):
"""Directly extract features from the backbone+neck
"""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmedetection/tools/get_flops.py`
"""
x = self.extract_feat(img)
outs = self.bbox_head(x)
return outs
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
x = self.extract_feat(img)
outs = self.bbox_head(x)
loss_inputs = outs + (gt_bboxes, gt_labels, img_metas, self.train_cfg)
losses = self.bbox_head.loss(
*loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
return losses
def simple_test(self, img, img_meta, rescale=False):
x = self.extract_feat(img)
outs = self.bbox_head(x)
bbox_inputs = outs + (img_meta, self.test_cfg, rescale)
bbox_list = self.bbox_head.get_bboxes(*bbox_inputs)
bbox_results = [
bbox2result(det_bboxes, det_labels, self.bbox_head.num_classes)
for det_bboxes, det_labels in bbox_list
]
return bbox_results[0]
def aug_test(self, imgs, img_metas, rescale=False):
raise NotImplementedError
| 2,822
| 31.448276
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/reppoints_detector.py
|
import torch
from mmdet.core import bbox2result, bbox_mapping_back, multiclass_nms
from ..registry import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module
class RepPointsDetector(SingleStageDetector):
"""RepPoints: Point Set Representation for Object Detection.
This detector is the implementation of:
- RepPoints detector (https://arxiv.org/pdf/1904.11490)
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(RepPointsDetector,
self).__init__(backbone, neck, bbox_head, train_cfg, test_cfg,
pretrained)
def merge_aug_results(self, aug_bboxes, aug_scores, img_metas):
"""Merge augmented detection bboxes and scores.
Args:
aug_bboxes (list[Tensor]): shape (n, 4*#class)
aug_scores (list[Tensor] or None): shape (n, #class)
img_shapes (list[Tensor]): shape (3, ).
Returns:
tuple: (bboxes, scores)
"""
recovered_bboxes = []
for bboxes, img_info in zip(aug_bboxes, img_metas):
img_shape = img_info[0]['img_shape']
scale_factor = img_info[0]['scale_factor']
flip = img_info[0]['flip']
bboxes = bbox_mapping_back(bboxes, img_shape, scale_factor, flip)
recovered_bboxes.append(bboxes)
bboxes = torch.cat(recovered_bboxes, dim=0)
if aug_scores is None:
return bboxes
else:
scores = torch.cat(aug_scores, dim=0)
return bboxes, scores
def aug_test(self, imgs, img_metas, rescale=False):
# recompute feats to save memory
feats = self.extract_feats(imgs)
aug_bboxes = []
aug_scores = []
for x, img_meta in zip(feats, img_metas):
# only one image in the batch
outs = self.bbox_head(x)
bbox_inputs = outs + (img_meta, self.test_cfg, False, False)
det_bboxes, det_scores = self.bbox_head.get_bboxes(*bbox_inputs)[0]
aug_bboxes.append(det_bboxes)
aug_scores.append(det_scores)
# after merging, bboxes will be rescaled to the original image size
merged_bboxes, merged_scores = self.merge_aug_results(
aug_bboxes, aug_scores, img_metas)
det_bboxes, det_labels = multiclass_nms(merged_bboxes, merged_scores,
self.test_cfg.score_thr,
self.test_cfg.nms,
self.test_cfg.max_per_img)
if rescale:
_det_bboxes = det_bboxes
else:
_det_bboxes = det_bboxes.clone()
_det_bboxes[:, :4] *= img_metas[0][0]['scale_factor']
bbox_results = bbox2result(_det_bboxes, det_labels,
self.bbox_head.num_classes)
return bbox_results
| 3,089
| 36.682927
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/fast_rcnn.py
|
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class FastRCNN(TwoStageDetector):
def __init__(self,
backbone,
bbox_roi_extractor,
bbox_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
mask_roi_extractor=None,
mask_head=None,
pretrained=None):
super(FastRCNN, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
mask_roi_extractor=mask_roi_extractor,
mask_head=mask_head,
pretrained=pretrained)
def forward_test(self, imgs, img_metas, proposals, **kwargs):
for var, name in [(imgs, 'imgs'), (img_metas, 'img_metas')]:
if not isinstance(var, list):
raise TypeError('{} must be a list, but got {}'.format(
name, type(var)))
num_augs = len(imgs)
if num_augs != len(img_metas):
raise ValueError(
'num of augmentations ({}) != num of image meta ({})'.format(
len(imgs), len(img_metas)))
# TODO: remove the restriction of imgs_per_gpu == 1 when prepared
imgs_per_gpu = imgs[0].size(0)
assert imgs_per_gpu == 1
if num_augs == 1:
return self.simple_test(imgs[0], img_metas[0], proposals[0],
**kwargs)
else:
return self.aug_test(imgs, img_metas, proposals, **kwargs)
| 1,768
| 33.686275
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/s2anet.py
|
from .single_stage import SingleStageDetector
from ..registry import DETECTORS
@DETECTORS.register_module
class S2ANetDetector(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(S2ANetDetector, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 503
| 28.647059
| 82
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/cascade_rcnn.py
|
from __future__ import division
import torch
import torch.nn as nn
from mmdet.core import (bbox2result, bbox2roi, bbox_mapping, build_assigner,
build_sampler, merge_aug_bboxes, merge_aug_masks,
multiclass_nms)
from .. import builder
from ..registry import DETECTORS
from .base import BaseDetector
from .test_mixins import RPNTestMixin
@DETECTORS.register_module
class CascadeRCNN(BaseDetector, RPNTestMixin):
def __init__(self,
num_stages,
backbone,
neck=None,
shared_head=None,
rpn_head=None,
bbox_roi_extractor=None,
bbox_head=None,
mask_roi_extractor=None,
mask_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None):
assert bbox_roi_extractor is not None
assert bbox_head is not None
super(CascadeRCNN, self).__init__()
self.num_stages = num_stages
self.backbone = builder.build_backbone(backbone)
if neck is not None:
self.neck = builder.build_neck(neck)
if rpn_head is not None:
self.rpn_head = builder.build_head(rpn_head)
if shared_head is not None:
self.shared_head = builder.build_shared_head(shared_head)
if bbox_head is not None:
self.bbox_roi_extractor = nn.ModuleList()
self.bbox_head = nn.ModuleList()
if not isinstance(bbox_roi_extractor, list):
bbox_roi_extractor = [
bbox_roi_extractor for _ in range(num_stages)
]
if not isinstance(bbox_head, list):
bbox_head = [bbox_head for _ in range(num_stages)]
assert len(bbox_roi_extractor) == len(bbox_head) == self.num_stages
for roi_extractor, head in zip(bbox_roi_extractor, bbox_head):
self.bbox_roi_extractor.append(
builder.build_roi_extractor(roi_extractor))
self.bbox_head.append(builder.build_head(head))
if mask_head is not None:
self.mask_head = nn.ModuleList()
if not isinstance(mask_head, list):
mask_head = [mask_head for _ in range(num_stages)]
assert len(mask_head) == self.num_stages
for head in mask_head:
self.mask_head.append(builder.build_head(head))
if mask_roi_extractor is not None:
self.share_roi_extractor = False
self.mask_roi_extractor = nn.ModuleList()
if not isinstance(mask_roi_extractor, list):
mask_roi_extractor = [
mask_roi_extractor for _ in range(num_stages)
]
assert len(mask_roi_extractor) == self.num_stages
for roi_extractor in mask_roi_extractor:
self.mask_roi_extractor.append(
builder.build_roi_extractor(roi_extractor))
else:
self.share_roi_extractor = True
self.mask_roi_extractor = self.bbox_roi_extractor
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.init_weights(pretrained=pretrained)
@property
def with_rpn(self):
return hasattr(self, 'rpn_head') and self.rpn_head is not None
def init_weights(self, pretrained=None):
super(CascadeRCNN, self).init_weights(pretrained)
self.backbone.init_weights(pretrained=pretrained)
if self.with_neck:
if isinstance(self.neck, nn.Sequential):
for m in self.neck:
m.init_weights()
else:
self.neck.init_weights()
if self.with_rpn:
self.rpn_head.init_weights()
if self.with_shared_head:
self.shared_head.init_weights(pretrained=pretrained)
for i in range(self.num_stages):
if self.with_bbox:
self.bbox_roi_extractor[i].init_weights()
self.bbox_head[i].init_weights()
if self.with_mask:
if not self.share_roi_extractor:
self.mask_roi_extractor[i].init_weights()
self.mask_head[i].init_weights()
def extract_feat(self, img):
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).cuda()
# bbox heads
rois = bbox2roi([proposals])
if self.with_bbox:
for i in range(self.num_stages):
bbox_feats = self.bbox_roi_extractor[i](
x[:self.bbox_roi_extractor[i].num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head[i](bbox_feats)
outs = outs + (cls_score, bbox_pred)
# mask heads
if self.with_mask:
mask_rois = rois[:100]
for i in range(self.num_stages):
mask_feats = self.mask_roi_extractor[i](
x[:self.mask_roi_extractor[i].num_inputs], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head[i](mask_feats)
outs = outs + (mask_pred, )
return outs
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_meta (list[dict]): list of image info dict where each dict has:
'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
x = self.extract_feat(img)
losses = dict()
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
for i in range(self.num_stages):
self.current_stage = i
rcnn_train_cfg = self.train_cfg.rcnn[i]
lw = self.train_cfg.stage_loss_weights[i]
# assign gts and sample proposals
sampling_results = []
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(rcnn_train_cfg.assigner)
bbox_sampler = build_sampler(
rcnn_train_cfg.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
for j in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[j], gt_bboxes[j], gt_bboxes_ignore[j],
gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
bbox_roi_extractor = self.bbox_roi_extractor[i]
bbox_head = self.bbox_head[i]
rois = bbox2roi([res.bboxes for res in sampling_results])
bbox_feats = bbox_roi_extractor(x[:bbox_roi_extractor.num_inputs],
rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = bbox_head(bbox_feats)
bbox_targets = bbox_head.get_target(sampling_results, gt_bboxes,
gt_labels, rcnn_train_cfg)
loss_bbox = bbox_head.loss(cls_score, bbox_pred, *bbox_targets)
for name, value in loss_bbox.items():
losses['s{}.{}'.format(i, name)] = (
value * lw if 'loss' in name else value)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
mask_roi_extractor = self.mask_roi_extractor[i]
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = mask_roi_extractor(
x[:mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
# reuse positive bbox feats
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_head = self.mask_head[i]
mask_pred = mask_head(mask_feats)
mask_targets = mask_head.get_target(sampling_results, gt_masks,
rcnn_train_cfg)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = mask_head.loss(mask_pred, mask_targets, pos_labels)
for name, value in loss_mask.items():
losses['s{}.{}'.format(i, name)] = (
value * lw if 'loss' in name else value)
# refine bboxes
if i < self.num_stages - 1:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
roi_labels = bbox_targets[0] # bbox_targets is a tuple
with torch.no_grad():
proposal_list = bbox_head.refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
return losses
def simple_test(self, img, img_meta, proposals=None, rescale=False):
"""Run inference on a single image.
Args:
img (Tensor): must be in shape (N, C, H, W)
img_meta (list[dict]): a list with one dictionary element.
See `mmdet/datasets/pipelines/formatting.py:Collect` for
details of meta dicts.
proposals : if specified overrides rpn proposals
rescale (bool): if True returns boxes in original image space
Returns:
dict: results
"""
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(
x, img_meta, self.test_cfg.rpn) if proposals is None else proposals
img_shape = img_meta[0]['img_shape']
ori_shape = img_meta[0]['ori_shape']
scale_factor = img_meta[0]['scale_factor']
# "ms" in variable names means multi-stage
ms_bbox_result = {}
ms_segm_result = {}
ms_scores = []
rcnn_test_cfg = self.test_cfg.rcnn
rois = bbox2roi(proposal_list)
for i in range(self.num_stages):
bbox_roi_extractor = self.bbox_roi_extractor[i]
bbox_head = self.bbox_head[i]
bbox_feats = bbox_roi_extractor(
x[:len(bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = bbox_head(bbox_feats)
ms_scores.append(cls_score)
if self.test_cfg.keep_all_stages:
det_bboxes, det_labels = bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
bbox_result = bbox2result(det_bboxes, det_labels,
bbox_head.num_classes)
ms_bbox_result['stage{}'.format(i)] = bbox_result
if self.with_mask:
mask_roi_extractor = self.mask_roi_extractor[i]
mask_head = self.mask_head[i]
if det_bboxes.shape[0] == 0:
mask_classes = mask_head.num_classes - 1
segm_result = [[] for _ in range(mask_classes)]
else:
_bboxes = (
det_bboxes[:, :4] *
scale_factor if rescale else det_bboxes)
mask_rois = bbox2roi([_bboxes])
mask_feats = mask_roi_extractor(
x[:len(mask_roi_extractor.featmap_strides)],
mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats, i)
mask_pred = mask_head(mask_feats)
segm_result = mask_head.get_seg_masks(
mask_pred, _bboxes, det_labels, rcnn_test_cfg,
ori_shape, scale_factor, rescale)
ms_segm_result['stage{}'.format(i)] = segm_result
if i < self.num_stages - 1:
bbox_label = cls_score.argmax(dim=1)
rois = bbox_head.regress_by_class(rois, bbox_label, bbox_pred,
img_meta[0])
cls_score = sum(ms_scores) / self.num_stages
det_bboxes, det_labels = self.bbox_head[-1].get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
bbox_result = bbox2result(det_bboxes, det_labels,
self.bbox_head[-1].num_classes)
ms_bbox_result['ensemble'] = bbox_result
if self.with_mask:
if det_bboxes.shape[0] == 0:
mask_classes = self.mask_head[-1].num_classes - 1
segm_result = [[] for _ in range(mask_classes)]
else:
if isinstance(scale_factor, float): # aspect ratio fixed
_bboxes = (
det_bboxes[:, :4] *
scale_factor if rescale else det_bboxes)
else:
_bboxes = (
det_bboxes[:, :4] *
torch.from_numpy(scale_factor).to(det_bboxes.device)
if rescale else det_bboxes)
mask_rois = bbox2roi([_bboxes])
aug_masks = []
for i in range(self.num_stages):
mask_roi_extractor = self.mask_roi_extractor[i]
mask_feats = mask_roi_extractor(
x[:len(mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head[i](mask_feats)
aug_masks.append(mask_pred.sigmoid().cpu().numpy())
merged_masks = merge_aug_masks(aug_masks,
[img_meta] * self.num_stages,
self.test_cfg.rcnn)
segm_result = self.mask_head[-1].get_seg_masks(
merged_masks, _bboxes, det_labels, rcnn_test_cfg,
ori_shape, scale_factor, rescale)
ms_segm_result['ensemble'] = segm_result
if not self.test_cfg.keep_all_stages:
if self.with_mask:
results = (ms_bbox_result['ensemble'],
ms_segm_result['ensemble'])
else:
results = ms_bbox_result['ensemble']
else:
if self.with_mask:
results = {
stage: (ms_bbox_result[stage], ms_segm_result[stage])
for stage in ms_bbox_result
}
else:
results = ms_bbox_result
return results
def aug_test(self, imgs, img_metas, proposals=None, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
# recompute feats to save memory
proposal_list = self.aug_test_rpn(
self.extract_feats(imgs), img_metas, self.test_cfg.rpn)
rcnn_test_cfg = self.test_cfg.rcnn
aug_bboxes = []
aug_scores = []
for x, img_meta in zip(self.extract_feats(imgs), img_metas):
# only one image in the batch
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
proposals = bbox_mapping(proposal_list[0][:, :4], img_shape,
scale_factor, flip)
# "ms" in variable names means multi-stage
ms_scores = []
rois = bbox2roi([proposals])
for i in range(self.num_stages):
bbox_roi_extractor = self.bbox_roi_extractor[i]
bbox_head = self.bbox_head[i]
bbox_feats = bbox_roi_extractor(
x[:len(bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = bbox_head(bbox_feats)
ms_scores.append(cls_score)
if i < self.num_stages - 1:
bbox_label = cls_score.argmax(dim=1)
rois = bbox_head.regress_by_class(rois, bbox_label,
bbox_pred, img_meta[0])
cls_score = sum(ms_scores) / float(len(ms_scores))
bboxes, scores = self.bbox_head[-1].get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None)
aug_bboxes.append(bboxes)
aug_scores.append(scores)
# after merging, bboxes will be rescaled to the original image size
merged_bboxes, merged_scores = merge_aug_bboxes(
aug_bboxes, aug_scores, img_metas, rcnn_test_cfg)
det_bboxes, det_labels = multiclass_nms(merged_bboxes, merged_scores,
rcnn_test_cfg.score_thr,
rcnn_test_cfg.nms,
rcnn_test_cfg.max_per_img)
bbox_result = bbox2result(det_bboxes, det_labels,
self.bbox_head[-1].num_classes)
if self.with_mask:
if det_bboxes.shape[0] == 0:
segm_result = [[]
for _ in range(self.mask_head[-1].num_classes -
1)]
else:
aug_masks = []
aug_img_metas = []
for x, img_meta in zip(self.extract_feats(imgs), img_metas):
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
_bboxes = bbox_mapping(det_bboxes[:, :4], img_shape,
scale_factor, flip)
mask_rois = bbox2roi([_bboxes])
for i in range(self.num_stages):
mask_feats = self.mask_roi_extractor[i](
x[:len(self.mask_roi_extractor[i].featmap_strides
)], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head[i](mask_feats)
aug_masks.append(mask_pred.sigmoid().cpu().numpy())
aug_img_metas.append(img_meta)
merged_masks = merge_aug_masks(aug_masks, aug_img_metas,
self.test_cfg.rcnn)
ori_shape = img_metas[0][0]['ori_shape']
segm_result = self.mask_head[-1].get_seg_masks(
merged_masks,
det_bboxes,
det_labels,
rcnn_test_cfg,
ori_shape,
scale_factor=1.0,
rescale=False)
return bbox_result, segm_result
else:
return bbox_result
def show_result(self, data, result, **kwargs):
if self.with_mask:
ms_bbox_result, ms_segm_result = result
if isinstance(ms_bbox_result, dict):
result = (ms_bbox_result['ensemble'],
ms_segm_result['ensemble'])
else:
if isinstance(result, dict):
result = result['ensemble']
super(CascadeRCNN, self).show_result(data, result, **kwargs)
| 23,674
| 41.276786
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/mask_rcnn.py
|
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class MaskRCNN(TwoStageDetector):
def __init__(self,
backbone,
rpn_head,
bbox_roi_extractor,
bbox_head,
mask_roi_extractor,
mask_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
pretrained=None):
super(MaskRCNN, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
rpn_head=rpn_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
mask_roi_extractor=mask_roi_extractor,
mask_head=mask_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained)
| 926
| 27.96875
| 50
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/faster_rcnn_hbb_obb.py
|
import torch
from mmdet.core import (bbox2result_rotated, rotated_box_to_roi, build_assigner, build_sampler, bbox_to_rotated_box,
bbox_mapping, multiclass_nms_rotated, merge_aug_bboxes_rotated, rotated_box_to_bbox,
bbox2roi)
from .two_stage import TwoStageDetector
from ..registry import DETECTORS
@DETECTORS.register_module
class FasterRCNNHBBOBB(TwoStageDetector):
def __init__(self,
backbone,
rpn_head,
bbox_roi_extractor,
bbox_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
pretrained=None):
super(FasterRCNNHBBOBB, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
rpn_head=rpn_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained)
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmedetection/tools/get_flops.py`
"""
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs,)
proposals = torch.randn(1000, 5).cuda()
# bbox head
rois = rotated_box_to_roi([proposals])
if self.with_bbox:
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
outs = outs + (cls_score, bbox_pred)
# mask head
if self.with_mask:
mask_rois = rois[:100]
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head(mask_feats)
outs = outs + (mask_pred,)
return outs
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_meta (list[dict]): list of image info dict where each dict has:
'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
# transform obb gt to hbb gt
gt_bboxes_hbb = [rotated_box_to_bbox(x) for x in gt_bboxes]
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes_hbb, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
# we use bbox_overlaps for assignment
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes_hbb[i],
gt_bboxes_ignore[i],
gt_labels[i])
# but for sampling, we sample obb proposal for the next stage regression
# transform hbb proposal to obb proposal for sampling
sampling_result = bbox_sampler.sample(
assign_result,
bbox_to_rotated_box(proposal_list[i]),
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
# TODO not checked
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def simple_test(self, img, img_meta, proposals=None, rescale=False):
"""Test without augmentation."""
assert self.with_bbox, "Bbox head must be implemented."
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(
x, img_meta, self.test_cfg.rpn) if proposals is None else proposals
det_bboxes, det_labels = self.simple_test_bboxes(
x, img_meta, proposal_list, self.test_cfg.rcnn, rescale=rescale)
bbox_results = bbox2result_rotated(det_bboxes, det_labels,
self.bbox_head.num_classes)
if not self.with_mask:
return bbox_results
else:
segm_results = self.simple_test_mask(
x, img_meta, det_bboxes, det_labels, rescale=rescale)
return bbox_results, segm_results
def aug_test(self, imgs, img_metas, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
# recompute feats to save memory
proposal_list = self.aug_test_rpn(
self.extract_feats(imgs), img_metas, self.test_cfg.rpn)
det_bboxes, det_labels = self.aug_test_bboxes(
self.extract_feats(imgs), img_metas, proposal_list,
self.test_cfg.rcnn)
if rescale:
_det_bboxes = det_bboxes
else:
_det_bboxes = det_bboxes.clone()
_det_bboxes[:, :4] *= img_metas[0][0]['scale_factor']
bbox_results = bbox2result_rotated(_det_bboxes, det_labels,
self.bbox_head.num_classes)
# det_bboxes always keep the original scale
if self.with_mask:
segm_results = self.aug_test_mask(
self.extract_feats(imgs), img_metas, det_bboxes, det_labels)
return bbox_results, segm_results
else:
return bbox_results
def simple_test_bboxes(self,
x,
img_meta,
proposals,
rcnn_test_cfg,
rescale=False):
"""Test only det bboxes without augmentation."""
rois = bbox2roi(proposals)
roi_feats = self.bbox_roi_extractor(
x[:len(self.bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
roi_feats = self.shared_head(roi_feats)
cls_score, bbox_pred = self.bbox_head(roi_feats)
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
det_bboxes, det_labels = self.bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
return det_bboxes, det_labels
def aug_test_bboxes(self, feats, img_metas, proposal_list, rcnn_test_cfg):
aug_bboxes = []
aug_scores = []
for x, img_meta in zip(feats, img_metas):
# only one image in the batch
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
# TODO more flexible
proposals = bbox_mapping(proposal_list[0][:, :4], img_shape, scale_factor, flip)
rois = bbox2roi([proposals])
# recompute feature maps to save GPU memory
roi_feats = self.bbox_roi_extractor(
x[:len(self.bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
roi_feats = self.shared_head(roi_feats)
cls_score, bbox_pred = self.bbox_head(roi_feats)
bboxes, scores = self.bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None)
aug_bboxes.append(bboxes)
aug_scores.append(scores)
# after merging, bboxes will be rescaled to the original image size
merged_bboxes, merged_scores = merge_aug_bboxes_rotated(
aug_bboxes, aug_scores, img_metas, rcnn_test_cfg)
det_bboxes, det_labels = multiclass_nms_rotated(merged_bboxes, merged_scores,
rcnn_test_cfg.score_thr,
rcnn_test_cfg.nms,
rcnn_test_cfg.max_per_img)
return det_bboxes, det_labels
| 13,152
| 40.755556
| 116
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/faster_rcnn.py
|
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class FasterRCNN(TwoStageDetector):
def __init__(self,
backbone,
rpn_head,
bbox_roi_extractor,
bbox_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
pretrained=None):
super(FasterRCNN, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
rpn_head=rpn_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained)
| 781
| 26.928571
| 50
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/grid_rcnn.py
|
import torch
from mmdet.core import bbox2result, bbox2roi, build_assigner, build_sampler
from .. import builder
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class GridRCNN(TwoStageDetector):
"""Grid R-CNN.
This detector is the implementation of:
- Grid R-CNN (https://arxiv.org/abs/1811.12030)
- Grid R-CNN Plus: Faster and Better (https://arxiv.org/abs/1906.05688)
"""
def __init__(self,
backbone,
rpn_head,
bbox_roi_extractor,
bbox_head,
grid_roi_extractor,
grid_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
pretrained=None):
assert grid_head is not None
super(GridRCNN, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
rpn_head=rpn_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained)
if grid_roi_extractor is not None:
self.grid_roi_extractor = builder.build_roi_extractor(
grid_roi_extractor)
self.share_roi_extractor = False
else:
self.share_roi_extractor = True
self.grid_roi_extractor = self.bbox_roi_extractor
self.grid_head = builder.build_head(grid_head)
self.init_extra_weights()
def init_extra_weights(self):
self.grid_head.init_weights()
if not self.share_roi_extractor:
self.grid_roi_extractor.init_weights()
def _random_jitter(self, sampling_results, img_metas, amplitude=0.15):
"""Ramdom jitter positive proposals for training."""
for sampling_result, img_meta in zip(sampling_results, img_metas):
bboxes = sampling_result.pos_bboxes
random_offsets = bboxes.new_empty(bboxes.shape[0], 4).uniform_(
-amplitude, amplitude)
# before jittering
cxcy = (bboxes[:, 2:4] + bboxes[:, :2]) / 2
wh = (bboxes[:, 2:4] - bboxes[:, :2]).abs()
# after jittering
new_cxcy = cxcy + wh * random_offsets[:, :2]
new_wh = wh * (1 + random_offsets[:, 2:])
# xywh to xyxy
new_x1y1 = (new_cxcy - new_wh / 2)
new_x2y2 = (new_cxcy + new_wh / 2)
new_bboxes = torch.cat([new_x1y1, new_x2y2], dim=1)
# clip bboxes
max_shape = img_meta['img_shape']
if max_shape is not None:
new_bboxes[:, 0::2].clamp_(min=0, max=max_shape[1] - 1)
new_bboxes[:, 1::2].clamp_(min=0, max=max_shape[0] - 1)
sampling_result.pos_bboxes = new_bboxes
return sampling_results
def forward_dummy(self, img):
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).cuda()
# bbox head
rois = bbox2roi([proposals])
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
# grid head
grid_rois = rois[:100]
grid_feats = self.grid_roi_extractor(
x[:self.grid_roi_extractor.num_inputs], grid_rois)
if self.with_shared_head:
grid_feats = self.shared_head(grid_feats)
grid_pred = self.grid_head(grid_feats)
return rpn_outs, cls_score, bbox_pred, grid_pred
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
if self.with_bbox:
# assign gts and sample proposals
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# Grid head forward and loss
sampling_results = self._random_jitter(sampling_results, img_meta)
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
grid_feats = self.grid_roi_extractor(
x[:self.grid_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
grid_feats = self.shared_head(grid_feats)
# Accelerate training
max_sample_num_grid = self.train_cfg.rcnn.get('max_num_grid', 192)
sample_idx = torch.randperm(
grid_feats.shape[0])[:min(grid_feats.
shape[0], max_sample_num_grid)]
grid_feats = grid_feats[sample_idx]
grid_pred = self.grid_head(grid_feats)
grid_targets = self.grid_head.get_target(sampling_results,
self.train_cfg.rcnn)
grid_targets = grid_targets[sample_idx]
loss_grid = self.grid_head.loss(grid_pred, grid_targets)
losses.update(loss_grid)
return losses
def simple_test(self, img, img_meta, proposals=None, rescale=False):
"""Test without augmentation."""
assert self.with_bbox, "Bbox head must be implemented."
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(
x, img_meta, self.test_cfg.rpn) if proposals is None else proposals
det_bboxes, det_labels = self.simple_test_bboxes(
x, img_meta, proposal_list, self.test_cfg.rcnn, rescale=False)
# pack rois into bboxes
grid_rois = bbox2roi([det_bboxes[:, :4]])
grid_feats = self.grid_roi_extractor(
x[:len(self.grid_roi_extractor.featmap_strides)], grid_rois)
if grid_rois.shape[0] != 0:
self.grid_head.test_mode = True
grid_pred = self.grid_head(grid_feats)
det_bboxes = self.grid_head.get_bboxes(det_bboxes,
grid_pred['fused'],
img_meta)
if rescale:
det_bboxes[:, :4] /= img_meta[0]['scale_factor']
else:
det_bboxes = torch.Tensor([])
bbox_results = bbox2result(det_bboxes, det_labels,
self.bbox_head.num_classes)
return bbox_results
| 9,225
| 39.113043
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/double_head_rcnn.py
|
import torch
from mmdet.core import bbox2roi, build_assigner, build_sampler
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class DoubleHeadRCNN(TwoStageDetector):
def __init__(self, reg_roi_scale_factor, **kwargs):
super().__init__(**kwargs)
self.reg_roi_scale_factor = reg_roi_scale_factor
def forward_dummy(self, img):
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).cuda()
# bbox head
rois = bbox2roi([proposals])
bbox_cls_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
bbox_reg_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs],
rois,
roi_scale_factor=self.reg_roi_scale_factor)
if self.with_shared_head:
bbox_cls_feats = self.shared_head(bbox_cls_feats)
bbox_reg_feats = self.shared_head(bbox_reg_feats)
cls_score, bbox_pred = self.bbox_head(bbox_cls_feats, bbox_reg_feats)
outs += (cls_score, bbox_pred)
return outs
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_cls_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
bbox_reg_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs],
rois,
roi_scale_factor=self.reg_roi_scale_factor)
if self.with_shared_head:
bbox_cls_feats = self.shared_head(bbox_cls_feats)
bbox_reg_feats = self.shared_head(bbox_reg_feats)
cls_score, bbox_pred = self.bbox_head(bbox_cls_feats,
bbox_reg_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_cls_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_cls_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def simple_test_bboxes(self,
x,
img_meta,
proposals,
rcnn_test_cfg,
rescale=False):
"""Test only det bboxes without augmentation."""
rois = bbox2roi(proposals)
bbox_cls_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
bbox_reg_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs],
rois,
roi_scale_factor=self.reg_roi_scale_factor)
if self.with_shared_head:
bbox_cls_feats = self.shared_head(bbox_cls_feats)
bbox_reg_feats = self.shared_head(bbox_reg_feats)
cls_score, bbox_pred = self.bbox_head(bbox_cls_feats, bbox_reg_feats)
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
det_bboxes, det_labels = self.bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
return det_bboxes, det_labels
| 7,453
| 40.642458
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/rpn.py
|
import mmcv
from mmdet.core import bbox_mapping, tensor2imgs
from .. import builder
from ..registry import DETECTORS
from .base import BaseDetector
from .test_mixins import RPNTestMixin
@DETECTORS.register_module
class RPN(BaseDetector, RPNTestMixin):
def __init__(self,
backbone,
neck,
rpn_head,
train_cfg,
test_cfg,
pretrained=None):
super(RPN, self).__init__()
self.backbone = builder.build_backbone(backbone)
self.neck = builder.build_neck(neck) if neck is not None else None
self.rpn_head = builder.build_head(rpn_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.init_weights(pretrained=pretrained)
def init_weights(self, pretrained=None):
super(RPN, self).init_weights(pretrained)
self.backbone.init_weights(pretrained=pretrained)
if self.with_neck:
self.neck.init_weights()
self.rpn_head.init_weights()
def extract_feat(self, img):
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
x = self.extract_feat(img)
rpn_outs = self.rpn_head(x)
return rpn_outs
def forward_train(self,
img,
img_meta,
gt_bboxes=None,
gt_bboxes_ignore=None):
if self.train_cfg.rpn.get('debug', False):
self.rpn_head.debug_imgs = tensor2imgs(img)
x = self.extract_feat(img)
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta, self.train_cfg.rpn)
losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
return losses
def simple_test(self, img, img_meta, rescale=False):
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(x, img_meta, self.test_cfg.rpn)
if rescale:
for proposals, meta in zip(proposal_list, img_meta):
proposals[:, :4] /= meta['scale_factor']
# TODO: remove this restriction
return proposal_list[0].cpu().numpy()
def aug_test(self, imgs, img_metas, rescale=False):
proposal_list = self.aug_test_rpn(
self.extract_feats(imgs), img_metas, self.test_cfg.rpn)
if not rescale:
for proposals, img_meta in zip(proposal_list, img_metas[0]):
img_shape = img_meta['img_shape']
scale_factor = img_meta['scale_factor']
flip = img_meta['flip']
proposals[:, :4] = bbox_mapping(proposals[:, :4], img_shape,
scale_factor, flip)
# TODO: remove this restriction
return proposal_list[0].cpu().numpy()
def show_result(self, data, result, dataset=None, top_k=20):
"""Show RPN proposals on the image.
Although we assume batch size is 1, this method supports arbitrary
batch size.
"""
img_tensor = data['img'][0]
img_metas = data['img_meta'][0].data[0]
imgs = tensor2imgs(img_tensor, **img_metas[0]['img_norm_cfg'])
assert len(imgs) == len(img_metas)
for img, img_meta in zip(imgs, img_metas):
h, w, _ = img_meta['img_shape']
img_show = img[:h, :w, :]
mmcv.imshow_bboxes(img_show, result, top_k=top_k)
| 3,513
| 34.857143
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/retinanet.py
|
from ..registry import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module
class RetinaNet(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(RetinaNet, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 488
| 27.764706
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/cascade_s2anet.py
|
import torch.nn as nn
from mmdet.core import bbox2result
from .base import BaseDetector
from .. import builder
from ..registry import DETECTORS
@DETECTORS.register_module
class CascadeS2ANetDetector(BaseDetector):
"""Base class for single-stage detectors.
Single-stage detectors directly and densely predict bounding boxes on the
output features of the backbone+neck.
"""
def __init__(self,
num_stages,
backbone,
neck=None,
bbox_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(CascadeS2ANetDetector, self).__init__()
self.num_stages = num_stages
self.backbone = builder.build_backbone(backbone)
if neck is not None:
self.neck = builder.build_neck(neck)
self.bbox_head = nn.ModuleList()
for head in bbox_head:
self.bbox_head.append(builder.build_head(head))
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.init_weights(pretrained=pretrained)
def init_weights(self, pretrained=None):
super(CascadeS2ANetDetector, self).init_weights(pretrained)
self.backbone.init_weights(pretrained=pretrained)
if self.with_neck:
if isinstance(self.neck, nn.Sequential):
for m in self.neck:
m.init_weights()
else:
self.neck.init_weights()
for i in range(self.num_stages):
if self.with_bbox:
self.bbox_head[i].init_weights()
def extract_feat(self, img):
"""Directly extract features from the backbone+neck
"""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmedetection/tools/get_flops.py`
"""
# TODO add related codes
x = self.extract_feat(img)
outs = self.bbox_head(x)
return outs
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
losses = dict()
x = self.extract_feat(img)
featmap_sizes = [featmap.size()[-2:] for featmap in x]
anchors_list, valid_flag_list = self.bbox_head[0].get_init_anchors(featmap_sizes, img_metas, device=x[0].device)
for i in range(self.num_stages):
self.current_stage = i
lw = self.train_cfg.loss_weight[i]
# copy anchor tensors to avoid reshape error in get_refined_anchors()
anchors_list_cp = [
[anchor.clone() for anchor in multi_img_anchors]
for multi_img_anchors in anchors_list
]
outs = self.bbox_head[i](x, anchors_list_cp)
loss_inputs = outs + (
anchors_list_cp, valid_flag_list, gt_bboxes, gt_labels, img_metas, self.train_cfg.stage_cfg[i])
stage_loss = self.bbox_head[i].loss(
*loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
for name, value in stage_loss.items():
mean_value = sum(value)
losses['s{}.{}'.format(i, name)] = (
mean_value * lw if 'loss' in name else mean_value)
if i < self.num_stages - 1:
anchors_list, valid_flag_list = self.bbox_head[i].get_refine_anchors(
outs[1], anchors_list, featmap_sizes, img_metas, device=x[0].device)
return losses
def simple_test(self, img, img_meta, rescale=False):
x = self.extract_feat(img)
featmap_sizes = [featmap.size()[-2:] for featmap in x]
anchors_list, valid_flag_list = self.bbox_head[0].get_init_anchors(featmap_sizes, img_meta,
device=x[0].device)
for i in range(self.num_stages):
outs = self.bbox_head[i](x, anchors_list)
if i < self.num_stages - 1:
anchors_list, valid_flag_list = self.bbox_head[i].get_refine_anchors(
outs[1], anchors_list, featmap_sizes, img_meta, device=x[0].device)
bbox_inputs = outs + (anchors_list, valid_flag_list, img_meta, self.test_cfg, rescale)
bbox_list = self.bbox_head[self.num_stages - 1].get_bboxes(*bbox_inputs)
bbox_results = [
bbox2result(det_bboxes, det_labels, self.bbox_head[self.num_stages - 1].num_classes)
for det_bboxes, det_labels in bbox_list
]
return bbox_results[0]
def aug_test(self, imgs, img_metas, rescale=False):
raise NotImplementedError
| 4,822
| 35.263158
| 120
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/fcos.py
|
from ..registry import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module
class FCOS(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(FCOS, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 473
| 26.882353
| 72
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/fovea.py
|
from ..registry import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module
class FOVEA(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(FOVEA, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 476
| 27.058824
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/htc.py
|
import torch
import torch.nn.functional as F
from mmdet.core import (bbox2result, bbox2roi, bbox_mapping, build_assigner,
build_sampler, merge_aug_bboxes, merge_aug_masks,
multiclass_nms)
from .. import builder
from ..registry import DETECTORS
from .cascade_rcnn import CascadeRCNN
@DETECTORS.register_module
class HybridTaskCascade(CascadeRCNN):
def __init__(self,
num_stages,
backbone,
semantic_roi_extractor=None,
semantic_head=None,
semantic_fusion=('bbox', 'mask'),
interleaved=True,
mask_info_flow=True,
**kwargs):
super(HybridTaskCascade, self).__init__(num_stages, backbone, **kwargs)
assert self.with_bbox and self.with_mask
assert not self.with_shared_head # shared head not supported
if semantic_head is not None:
self.semantic_roi_extractor = builder.build_roi_extractor(
semantic_roi_extractor)
self.semantic_head = builder.build_head(semantic_head)
self.semantic_fusion = semantic_fusion
self.interleaved = interleaved
self.mask_info_flow = mask_info_flow
@property
def with_semantic(self):
if hasattr(self, 'semantic_head') and self.semantic_head is not None:
return True
else:
return False
def _bbox_forward_train(self,
stage,
x,
sampling_results,
gt_bboxes,
gt_labels,
rcnn_train_cfg,
semantic_feat=None):
rois = bbox2roi([res.bboxes for res in sampling_results])
bbox_roi_extractor = self.bbox_roi_extractor[stage]
bbox_head = self.bbox_head[stage]
bbox_feats = bbox_roi_extractor(x[:bbox_roi_extractor.num_inputs],
rois)
# semantic feature fusion
# element-wise sum for original features and pooled semantic features
if self.with_semantic and 'bbox' in self.semantic_fusion:
bbox_semantic_feat = self.semantic_roi_extractor([semantic_feat],
rois)
if bbox_semantic_feat.shape[-2:] != bbox_feats.shape[-2:]:
bbox_semantic_feat = F.adaptive_avg_pool2d(
bbox_semantic_feat, bbox_feats.shape[-2:])
bbox_feats += bbox_semantic_feat
cls_score, bbox_pred = bbox_head(bbox_feats)
bbox_targets = bbox_head.get_target(sampling_results, gt_bboxes,
gt_labels, rcnn_train_cfg)
loss_bbox = bbox_head.loss(cls_score, bbox_pred, *bbox_targets)
return loss_bbox, rois, bbox_targets, bbox_pred
def _mask_forward_train(self,
stage,
x,
sampling_results,
gt_masks,
rcnn_train_cfg,
semantic_feat=None):
mask_roi_extractor = self.mask_roi_extractor[stage]
mask_head = self.mask_head[stage]
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
mask_feats = mask_roi_extractor(x[:mask_roi_extractor.num_inputs],
pos_rois)
# semantic feature fusion
# element-wise sum for original features and pooled semantic features
if self.with_semantic and 'mask' in self.semantic_fusion:
mask_semantic_feat = self.semantic_roi_extractor([semantic_feat],
pos_rois)
if mask_semantic_feat.shape[-2:] != mask_feats.shape[-2:]:
mask_semantic_feat = F.adaptive_avg_pool2d(
mask_semantic_feat, mask_feats.shape[-2:])
mask_feats += mask_semantic_feat
# mask information flow
# forward all previous mask heads to obtain last_feat, and fuse it
# with the normal mask feature
if self.mask_info_flow:
last_feat = None
for i in range(stage):
last_feat = self.mask_head[i](
mask_feats, last_feat, return_logits=False)
mask_pred = mask_head(mask_feats, last_feat, return_feat=False)
else:
mask_pred = mask_head(mask_feats)
mask_targets = mask_head.get_target(sampling_results, gt_masks,
rcnn_train_cfg)
pos_labels = torch.cat([res.pos_gt_labels for res in sampling_results])
loss_mask = mask_head.loss(mask_pred, mask_targets, pos_labels)
return loss_mask
def _bbox_forward_test(self, stage, x, rois, semantic_feat=None):
bbox_roi_extractor = self.bbox_roi_extractor[stage]
bbox_head = self.bbox_head[stage]
bbox_feats = bbox_roi_extractor(
x[:len(bbox_roi_extractor.featmap_strides)], rois)
if self.with_semantic and 'bbox' in self.semantic_fusion:
bbox_semantic_feat = self.semantic_roi_extractor([semantic_feat],
rois)
if bbox_semantic_feat.shape[-2:] != bbox_feats.shape[-2:]:
bbox_semantic_feat = F.adaptive_avg_pool2d(
bbox_semantic_feat, bbox_feats.shape[-2:])
bbox_feats += bbox_semantic_feat
cls_score, bbox_pred = bbox_head(bbox_feats)
return cls_score, bbox_pred
def _mask_forward_test(self, stage, x, bboxes, semantic_feat=None):
mask_roi_extractor = self.mask_roi_extractor[stage]
mask_head = self.mask_head[stage]
mask_rois = bbox2roi([bboxes])
mask_feats = mask_roi_extractor(
x[:len(mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_semantic and 'mask' in self.semantic_fusion:
mask_semantic_feat = self.semantic_roi_extractor([semantic_feat],
mask_rois)
if mask_semantic_feat.shape[-2:] != mask_feats.shape[-2:]:
mask_semantic_feat = F.adaptive_avg_pool2d(
mask_semantic_feat, mask_feats.shape[-2:])
mask_feats += mask_semantic_feat
if self.mask_info_flow:
last_feat = None
last_pred = None
for i in range(stage):
mask_pred, last_feat = self.mask_head[i](mask_feats, last_feat)
if last_pred is not None:
mask_pred = mask_pred + last_pred
last_pred = mask_pred
mask_pred = mask_head(mask_feats, last_feat, return_feat=False)
if last_pred is not None:
mask_pred = mask_pred + last_pred
else:
mask_pred = mask_head(mask_feats)
return mask_pred
def forward_dummy(self, img):
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).cuda()
# semantic head
if self.with_semantic:
_, semantic_feat = self.semantic_head(x)
else:
semantic_feat = None
# bbox heads
rois = bbox2roi([proposals])
for i in range(self.num_stages):
cls_score, bbox_pred = self._bbox_forward_test(
i, x, rois, semantic_feat=semantic_feat)
outs = outs + (cls_score, bbox_pred)
# mask heads
if self.with_mask:
mask_rois = rois[:100]
mask_roi_extractor = self.mask_roi_extractor[-1]
mask_feats = mask_roi_extractor(
x[:len(mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_semantic and 'mask' in self.semantic_fusion:
mask_semantic_feat = self.semantic_roi_extractor(
[semantic_feat], mask_rois)
mask_feats += mask_semantic_feat
last_feat = None
for i in range(self.num_stages):
mask_head = self.mask_head[i]
if self.mask_info_flow:
mask_pred, last_feat = mask_head(mask_feats, last_feat)
else:
mask_pred = mask_head(mask_feats)
outs = outs + (mask_pred, )
return outs
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
gt_semantic_seg=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN part, the same as normal two-stage detectors
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# semantic segmentation part
# 2 outputs: segmentation prediction and embedded features
if self.with_semantic:
semantic_pred, semantic_feat = self.semantic_head(x)
loss_seg = self.semantic_head.loss(semantic_pred, gt_semantic_seg)
losses['loss_semantic_seg'] = loss_seg
else:
semantic_feat = None
for i in range(self.num_stages):
self.current_stage = i
rcnn_train_cfg = self.train_cfg.rcnn[i]
lw = self.train_cfg.stage_loss_weights[i]
# assign gts and sample proposals
sampling_results = []
bbox_assigner = build_assigner(rcnn_train_cfg.assigner)
bbox_sampler = build_sampler(rcnn_train_cfg.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
for j in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[j],
gt_bboxes[j],
gt_bboxes_ignore[j],
gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
loss_bbox, rois, bbox_targets, bbox_pred = \
self._bbox_forward_train(
i, x, sampling_results, gt_bboxes, gt_labels,
rcnn_train_cfg, semantic_feat)
roi_labels = bbox_targets[0]
for name, value in loss_bbox.items():
losses['s{}.{}'.format(i, name)] = (
value * lw if 'loss' in name else value)
# mask head forward and loss
if self.with_mask:
# interleaved execution: use regressed bboxes by the box branch
# to train the mask branch
if self.interleaved:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
with torch.no_grad():
proposal_list = self.bbox_head[i].refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
# re-assign and sample 512 RoIs from 512 RoIs
sampling_results = []
for j in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[j], gt_bboxes[j],
gt_bboxes_ignore[j], gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
loss_mask = self._mask_forward_train(i, x, sampling_results,
gt_masks, rcnn_train_cfg,
semantic_feat)
for name, value in loss_mask.items():
losses['s{}.{}'.format(i, name)] = (
value * lw if 'loss' in name else value)
# refine bboxes (same as Cascade R-CNN)
if i < self.num_stages - 1 and not self.interleaved:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
with torch.no_grad():
proposal_list = self.bbox_head[i].refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
return losses
def simple_test(self, img, img_meta, proposals=None, rescale=False):
x = self.extract_feat(img)
proposal_list = self.simple_test_rpn(
x, img_meta, self.test_cfg.rpn) if proposals is None else proposals
if self.with_semantic:
_, semantic_feat = self.semantic_head(x)
else:
semantic_feat = None
img_shape = img_meta[0]['img_shape']
ori_shape = img_meta[0]['ori_shape']
scale_factor = img_meta[0]['scale_factor']
# "ms" in variable names means multi-stage
ms_bbox_result = {}
ms_segm_result = {}
ms_scores = []
rcnn_test_cfg = self.test_cfg.rcnn
rois = bbox2roi(proposal_list)
for i in range(self.num_stages):
bbox_head = self.bbox_head[i]
cls_score, bbox_pred = self._bbox_forward_test(
i, x, rois, semantic_feat=semantic_feat)
ms_scores.append(cls_score)
if self.test_cfg.keep_all_stages:
det_bboxes, det_labels = bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
bbox_result = bbox2result(det_bboxes, det_labels,
bbox_head.num_classes)
ms_bbox_result['stage{}'.format(i)] = bbox_result
if self.with_mask:
mask_head = self.mask_head[i]
if det_bboxes.shape[0] == 0:
mask_classes = mask_head.num_classes - 1
segm_result = [[] for _ in range(mask_classes)]
else:
_bboxes = (
det_bboxes[:, :4] *
scale_factor if rescale else det_bboxes)
mask_pred = self._mask_forward_test(
i, x, _bboxes, semantic_feat=semantic_feat)
segm_result = mask_head.get_seg_masks(
mask_pred, _bboxes, det_labels, rcnn_test_cfg,
ori_shape, scale_factor, rescale)
ms_segm_result['stage{}'.format(i)] = segm_result
if i < self.num_stages - 1:
bbox_label = cls_score.argmax(dim=1)
rois = bbox_head.regress_by_class(rois, bbox_label, bbox_pred,
img_meta[0])
cls_score = sum(ms_scores) / float(len(ms_scores))
det_bboxes, det_labels = self.bbox_head[-1].get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
bbox_result = bbox2result(det_bboxes, det_labels,
self.bbox_head[-1].num_classes)
ms_bbox_result['ensemble'] = bbox_result
if self.with_mask:
if det_bboxes.shape[0] == 0:
mask_classes = self.mask_head[-1].num_classes - 1
segm_result = [[] for _ in range(mask_classes)]
else:
_bboxes = (
det_bboxes[:, :4] *
scale_factor if rescale else det_bboxes)
mask_rois = bbox2roi([_bboxes])
aug_masks = []
mask_roi_extractor = self.mask_roi_extractor[-1]
mask_feats = mask_roi_extractor(
x[:len(mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_semantic and 'mask' in self.semantic_fusion:
mask_semantic_feat = self.semantic_roi_extractor(
[semantic_feat], mask_rois)
mask_feats += mask_semantic_feat
last_feat = None
for i in range(self.num_stages):
mask_head = self.mask_head[i]
if self.mask_info_flow:
mask_pred, last_feat = mask_head(mask_feats, last_feat)
else:
mask_pred = mask_head(mask_feats)
aug_masks.append(mask_pred.sigmoid().cpu().numpy())
merged_masks = merge_aug_masks(aug_masks,
[img_meta] * self.num_stages,
self.test_cfg.rcnn)
segm_result = self.mask_head[-1].get_seg_masks(
merged_masks, _bboxes, det_labels, rcnn_test_cfg,
ori_shape, scale_factor, rescale)
ms_segm_result['ensemble'] = segm_result
if not self.test_cfg.keep_all_stages:
if self.with_mask:
results = (ms_bbox_result['ensemble'],
ms_segm_result['ensemble'])
else:
results = ms_bbox_result['ensemble']
else:
if self.with_mask:
results = {
stage: (ms_bbox_result[stage], ms_segm_result[stage])
for stage in ms_bbox_result
}
else:
results = ms_bbox_result
return results
def aug_test(self, imgs, img_metas, proposals=None, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
if self.with_semantic:
semantic_feats = [
self.semantic_head(feat)[1]
for feat in self.extract_feats(imgs)
]
else:
semantic_feats = [None] * len(img_metas)
# recompute feats to save memory
proposal_list = self.aug_test_rpn(
self.extract_feats(imgs), img_metas, self.test_cfg.rpn)
rcnn_test_cfg = self.test_cfg.rcnn
aug_bboxes = []
aug_scores = []
for x, img_meta, semantic in zip(
self.extract_feats(imgs), img_metas, semantic_feats):
# only one image in the batch
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
proposals = bbox_mapping(proposal_list[0][:, :4], img_shape,
scale_factor, flip)
# "ms" in variable names means multi-stage
ms_scores = []
rois = bbox2roi([proposals])
for i in range(self.num_stages):
bbox_head = self.bbox_head[i]
cls_score, bbox_pred = self._bbox_forward_test(
i, x, rois, semantic_feat=semantic)
ms_scores.append(cls_score)
if i < self.num_stages - 1:
bbox_label = cls_score.argmax(dim=1)
rois = bbox_head.regress_by_class(rois, bbox_label,
bbox_pred, img_meta[0])
cls_score = sum(ms_scores) / float(len(ms_scores))
bboxes, scores = self.bbox_head[-1].get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None)
aug_bboxes.append(bboxes)
aug_scores.append(scores)
# after merging, bboxes will be rescaled to the original image size
merged_bboxes, merged_scores = merge_aug_bboxes(
aug_bboxes, aug_scores, img_metas, rcnn_test_cfg)
det_bboxes, det_labels = multiclass_nms(merged_bboxes, merged_scores,
rcnn_test_cfg.score_thr,
rcnn_test_cfg.nms,
rcnn_test_cfg.max_per_img)
bbox_result = bbox2result(det_bboxes, det_labels,
self.bbox_head[-1].num_classes)
if self.with_mask:
if det_bboxes.shape[0] == 0:
segm_result = [[]
for _ in range(self.mask_head[-1].num_classes -
1)]
else:
aug_masks = []
aug_img_metas = []
for x, img_meta, semantic in zip(
self.extract_feats(imgs), img_metas, semantic_feats):
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
_bboxes = bbox_mapping(det_bboxes[:, :4], img_shape,
scale_factor, flip)
mask_rois = bbox2roi([_bboxes])
mask_feats = self.mask_roi_extractor[-1](
x[:len(self.mask_roi_extractor[-1].featmap_strides)],
mask_rois)
if self.with_semantic:
semantic_feat = semantic
mask_semantic_feat = self.semantic_roi_extractor(
[semantic_feat], mask_rois)
if mask_semantic_feat.shape[-2:] != mask_feats.shape[
-2:]:
mask_semantic_feat = F.adaptive_avg_pool2d(
mask_semantic_feat, mask_feats.shape[-2:])
mask_feats += mask_semantic_feat
last_feat = None
for i in range(self.num_stages):
mask_head = self.mask_head[i]
if self.mask_info_flow:
mask_pred, last_feat = mask_head(
mask_feats, last_feat)
else:
mask_pred = mask_head(mask_feats)
aug_masks.append(mask_pred.sigmoid().cpu().numpy())
aug_img_metas.append(img_meta)
merged_masks = merge_aug_masks(aug_masks, aug_img_metas,
self.test_cfg.rcnn)
ori_shape = img_metas[0][0]['ori_shape']
segm_result = self.mask_head[-1].get_seg_masks(
merged_masks,
det_bboxes,
det_labels,
rcnn_test_cfg,
ori_shape,
scale_factor=1.0,
rescale=False)
return bbox_result, segm_result
else:
return bbox_result
| 24,580
| 43.210432
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/__init__.py
|
from .base import BaseDetector
from .cascade_rcnn import CascadeRCNN
from .cascade_s2anet import CascadeS2ANetDetector
from .double_head_rcnn import DoubleHeadRCNN
from .fast_rcnn import FastRCNN
from .faster_rcnn import FasterRCNN
from .faster_rcnn_hbb_obb import FasterRCNNHBBOBB
from .fcos import FCOS
from .fovea import FOVEA
from .grid_rcnn import GridRCNN
from .htc import HybridTaskCascade
from .mask_rcnn import MaskRCNN
from .mask_scoring_rcnn import MaskScoringRCNN
from .reppoints_detector import RepPointsDetector
from .retinanet import RetinaNet
from .rpn import RPN
from .s2anet import S2ANetDetector
from .single_stage import SingleStageDetector
from .two_stage import TwoStageDetector
__all__ = [
'BaseDetector', 'SingleStageDetector', 'TwoStageDetector', 'RPN',
'FastRCNN', 'FasterRCNN', 'MaskRCNN', 'CascadeRCNN', 'HybridTaskCascade',
'DoubleHeadRCNN', 'RetinaNet', 'FCOS', 'GridRCNN', 'MaskScoringRCNN',
'RepPointsDetector', 'FOVEA',
'S2ANetDetector', 'FasterRCNNHBBOBB', 'CascadeS2ANetDetector'
]
| 1,038
| 36.107143
| 77
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/mask_scoring_rcnn.py
|
import torch
from mmdet.core import bbox2roi, build_assigner, build_sampler
from .. import builder
from ..registry import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module
class MaskScoringRCNN(TwoStageDetector):
"""Mask Scoring RCNN.
https://arxiv.org/abs/1903.00241
"""
def __init__(self,
backbone,
rpn_head,
bbox_roi_extractor,
bbox_head,
mask_roi_extractor,
mask_head,
train_cfg,
test_cfg,
neck=None,
shared_head=None,
mask_iou_head=None,
pretrained=None):
super(MaskScoringRCNN, self).__init__(
backbone=backbone,
neck=neck,
shared_head=shared_head,
rpn_head=rpn_head,
bbox_roi_extractor=bbox_roi_extractor,
bbox_head=bbox_head,
mask_roi_extractor=mask_roi_extractor,
mask_head=mask_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained)
self.mask_iou_head = builder.build_head(mask_iou_head)
self.mask_iou_head.init_weights()
def forward_dummy(self, img):
raise NotImplementedError
# TODO: refactor forward_train in two stage to reduce code redundancy
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
# mask iou head forward and loss
pos_mask_pred = mask_pred[range(mask_pred.size(0)), pos_labels]
mask_iou_pred = self.mask_iou_head(mask_feats, pos_mask_pred)
pos_mask_iou_pred = mask_iou_pred[range(mask_iou_pred.size(0)
), pos_labels]
mask_iou_targets = self.mask_iou_head.get_target(
sampling_results, gt_masks, pos_mask_pred, mask_targets,
self.train_cfg.rcnn)
loss_mask_iou = self.mask_iou_head.loss(pos_mask_iou_pred,
mask_iou_targets)
losses.update(loss_mask_iou)
return losses
def simple_test_mask(self,
x,
img_meta,
det_bboxes,
det_labels,
rescale=False):
# image shape of the first image in the batch (only one)
ori_shape = img_meta[0]['ori_shape']
scale_factor = img_meta[0]['scale_factor']
if det_bboxes.shape[0] == 0:
segm_result = [[] for _ in range(self.mask_head.num_classes - 1)]
mask_scores = [[] for _ in range(self.mask_head.num_classes - 1)]
else:
# if det_bboxes is rescaled to the original image size, we need to
# rescale it back to the testing scale to obtain RoIs.
_bboxes = (
det_bboxes[:, :4] * scale_factor if rescale else det_bboxes)
mask_rois = bbox2roi([_bboxes])
mask_feats = self.mask_roi_extractor(
x[:len(self.mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head(mask_feats)
segm_result = self.mask_head.get_seg_masks(mask_pred, _bboxes,
det_labels,
self.test_cfg.rcnn,
ori_shape, scale_factor,
rescale)
# get mask scores with mask iou head
mask_iou_pred = self.mask_iou_head(
mask_feats,
mask_pred[range(det_labels.size(0)), det_labels + 1])
mask_scores = self.mask_iou_head.get_mask_scores(
mask_iou_pred, det_bboxes, det_labels)
return segm_result, mask_scores
| 8,565
| 41.616915
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/detectors/test_mixins.py
|
from mmdet.core import (bbox2roi, bbox_mapping, merge_aug_bboxes,
merge_aug_masks, merge_aug_proposals, multiclass_nms)
class RPNTestMixin(object):
def simple_test_rpn(self, x, img_meta, rpn_test_cfg):
rpn_outs = self.rpn_head(x)
proposal_inputs = rpn_outs + (img_meta, rpn_test_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
return proposal_list
def aug_test_rpn(self, feats, img_metas, rpn_test_cfg):
imgs_per_gpu = len(img_metas[0])
aug_proposals = [[] for _ in range(imgs_per_gpu)]
for x, img_meta in zip(feats, img_metas):
proposal_list = self.simple_test_rpn(x, img_meta, rpn_test_cfg)
for i, proposals in enumerate(proposal_list):
aug_proposals[i].append(proposals)
# reorganize the order of 'img_metas' to match the dimensions
# of 'aug_proposals'
aug_img_metas = []
for i in range(imgs_per_gpu):
aug_img_meta = []
for j in range(len(img_metas)):
aug_img_meta.append(img_metas[j][i])
aug_img_metas.append(aug_img_meta)
# after merging, proposals will be rescaled to the original image size
merged_proposals = [
merge_aug_proposals(proposals, aug_img_meta, rpn_test_cfg)
for proposals, aug_img_meta in zip(aug_proposals, aug_img_metas)
]
return merged_proposals
class BBoxTestMixin(object):
def simple_test_bboxes(self,
x,
img_meta,
proposals,
rcnn_test_cfg,
rescale=False):
"""Test only det bboxes without augmentation."""
rois = bbox2roi(proposals)
roi_feats = self.bbox_roi_extractor(
x[:len(self.bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
roi_feats = self.shared_head(roi_feats)
cls_score, bbox_pred = self.bbox_head(roi_feats)
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
det_bboxes, det_labels = self.bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=rescale,
cfg=rcnn_test_cfg)
return det_bboxes, det_labels
def aug_test_bboxes(self, feats, img_metas, proposal_list, rcnn_test_cfg):
aug_bboxes = []
aug_scores = []
for x, img_meta in zip(feats, img_metas):
# only one image in the batch
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
# TODO more flexible
proposals = bbox_mapping(proposal_list[0][:, :4], img_shape,
scale_factor, flip)
rois = bbox2roi([proposals])
# recompute feature maps to save GPU memory
roi_feats = self.bbox_roi_extractor(
x[:len(self.bbox_roi_extractor.featmap_strides)], rois)
if self.with_shared_head:
roi_feats = self.shared_head(roi_feats)
cls_score, bbox_pred = self.bbox_head(roi_feats)
bboxes, scores = self.bbox_head.get_det_bboxes(
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None)
aug_bboxes.append(bboxes)
aug_scores.append(scores)
# after merging, bboxes will be rescaled to the original image size
merged_bboxes, merged_scores = merge_aug_bboxes(
aug_bboxes, aug_scores, img_metas, rcnn_test_cfg)
det_bboxes, det_labels = multiclass_nms(merged_bboxes, merged_scores,
rcnn_test_cfg.score_thr,
rcnn_test_cfg.nms,
rcnn_test_cfg.max_per_img)
return det_bboxes, det_labels
class MaskTestMixin(object):
def simple_test_mask(self,
x,
img_meta,
det_bboxes,
det_labels,
rescale=False):
# image shape of the first image in the batch (only one)
ori_shape = img_meta[0]['ori_shape']
scale_factor = img_meta[0]['scale_factor']
if det_bboxes.shape[0] == 0:
segm_result = [[] for _ in range(self.mask_head.num_classes - 1)]
else:
# if det_bboxes is rescaled to the original image size, we need to
# rescale it back to the testing scale to obtain RoIs.
_bboxes = (
det_bboxes[:, :4] * scale_factor if rescale else det_bboxes)
mask_rois = bbox2roi([_bboxes])
mask_feats = self.mask_roi_extractor(
x[:len(self.mask_roi_extractor.featmap_strides)], mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head(mask_feats)
segm_result = self.mask_head.get_seg_masks(mask_pred, _bboxes,
det_labels,
self.test_cfg.rcnn,
ori_shape, scale_factor,
rescale)
return segm_result
def aug_test_mask(self, feats, img_metas, det_bboxes, det_labels):
if det_bboxes.shape[0] == 0:
segm_result = [[] for _ in range(self.mask_head.num_classes - 1)]
else:
aug_masks = []
for x, img_meta in zip(feats, img_metas):
img_shape = img_meta[0]['img_shape']
scale_factor = img_meta[0]['scale_factor']
flip = img_meta[0]['flip']
_bboxes = bbox_mapping(det_bboxes[:, :4], img_shape,
scale_factor, flip)
mask_rois = bbox2roi([_bboxes])
mask_feats = self.mask_roi_extractor(
x[:len(self.mask_roi_extractor.featmap_strides)],
mask_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
mask_pred = self.mask_head(mask_feats)
# convert to numpy array to save memory
aug_masks.append(mask_pred.sigmoid().cpu().numpy())
merged_masks = merge_aug_masks(aug_masks, img_metas,
self.test_cfg.rcnn)
ori_shape = img_metas[0][0]['ori_shape']
segm_result = self.mask_head.get_seg_masks(
merged_masks,
det_bboxes,
det_labels,
self.test_cfg.rcnn,
ori_shape,
scale_factor=1.0,
rescale=False)
return segm_result
| 7,197
| 42.624242
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/plugins/non_local.py
|
import torch
import torch.nn as nn
from mmcv.cnn import constant_init, normal_init
from ..utils import ConvModule
class NonLocal2D(nn.Module):
"""Non-local module.
See https://arxiv.org/abs/1711.07971 for details.
Args:
in_channels (int): Channels of the input feature map.
reduction (int): Channel reduction ratio.
use_scale (bool): Whether to scale pairwise_weight by 1/inter_channels.
conv_cfg (dict): The config dict for convolution layers.
(only applicable to conv_out)
norm_cfg (dict): The config dict for normalization layers.
(only applicable to conv_out)
mode (str): Options are `embedded_gaussian` and `dot_product`.
"""
def __init__(self,
in_channels,
reduction=2,
use_scale=True,
conv_cfg=None,
norm_cfg=None,
mode='embedded_gaussian'):
super(NonLocal2D, self).__init__()
self.in_channels = in_channels
self.reduction = reduction
self.use_scale = use_scale
self.inter_channels = in_channels // reduction
self.mode = mode
assert mode in ['embedded_gaussian', 'dot_product']
# g, theta, phi are actually `nn.Conv2d`. Here we use ConvModule for
# potential usage.
self.g = ConvModule(
self.in_channels,
self.inter_channels,
kernel_size=1,
activation=None)
self.theta = ConvModule(
self.in_channels,
self.inter_channels,
kernel_size=1,
activation=None)
self.phi = ConvModule(
self.in_channels,
self.inter_channels,
kernel_size=1,
activation=None)
self.conv_out = ConvModule(
self.inter_channels,
self.in_channels,
kernel_size=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
activation=None)
self.init_weights()
def init_weights(self, std=0.01, zeros_init=True):
for m in [self.g, self.theta, self.phi]:
normal_init(m.conv, std=std)
if zeros_init:
constant_init(self.conv_out.conv, 0)
else:
normal_init(self.conv_out.conv, std=std)
def embedded_gaussian(self, theta_x, phi_x):
# pairwise_weight: [N, HxW, HxW]
pairwise_weight = torch.matmul(theta_x, phi_x)
if self.use_scale:
# theta_x.shape[-1] is `self.inter_channels`
pairwise_weight /= theta_x.shape[-1]**0.5
pairwise_weight = pairwise_weight.softmax(dim=-1)
return pairwise_weight
def dot_product(self, theta_x, phi_x):
# pairwise_weight: [N, HxW, HxW]
pairwise_weight = torch.matmul(theta_x, phi_x)
pairwise_weight /= pairwise_weight.shape[-1]
return pairwise_weight
def forward(self, x):
n, _, h, w = x.shape
# g_x: [N, HxW, C]
g_x = self.g(x).view(n, self.inter_channels, -1)
g_x = g_x.permute(0, 2, 1)
# theta_x: [N, HxW, C]
theta_x = self.theta(x).view(n, self.inter_channels, -1)
theta_x = theta_x.permute(0, 2, 1)
# phi_x: [N, C, HxW]
phi_x = self.phi(x).view(n, self.inter_channels, -1)
pairwise_func = getattr(self, self.mode)
# pairwise_weight: [N, HxW, HxW]
pairwise_weight = pairwise_func(theta_x, phi_x)
# y: [N, HxW, C]
y = torch.matmul(pairwise_weight, g_x)
# y: [N, C, H, W]
y = y.permute(0, 2, 1).reshape(n, self.inter_channels, h, w)
output = x + self.conv_out(y)
return output
| 3,708
| 31.252174
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/plugins/__init__.py
|
from .generalized_attention import GeneralizedAttention
from .non_local import NonLocal2D
__all__ = ['NonLocal2D', 'GeneralizedAttention']
| 140
| 27.2
| 55
|
py
|
s2anet
|
s2anet-master/mmdet/models/plugins/generalized_attention.py
|
import math
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import kaiming_init
class GeneralizedAttention(nn.Module):
"""GeneralizedAttention module.
See 'An Empirical Study of Spatial Attention Mechanisms in Deep Networks'
(https://arxiv.org/abs/1711.07971) for details.
Args:
in_dim (int): Channels of the input feature map.
spatial_range (int): The spatial range.
-1 indicates no spatial range constraint.
num_heads (int): The head number of empirical_attention module.
position_embedding_dim (int): The position embedding dimension.
position_magnitude (int): A multiplier acting on coord difference.
kv_stride (int): The feature stride acting on key/value feature map.
q_stride (int): The feature stride acting on query feature map.
attention_type (str): A binary indicator string for indicating which
items in generalized empirical_attention module are used.
'1000' indicates 'query and key content' (appr - appr) item,
'0100' indicates 'query content and relative position'
(appr - position) item,
'0010' indicates 'key content only' (bias - appr) item,
'0001' indicates 'relative position only' (bias - position) item.
"""
def __init__(self,
in_dim,
spatial_range=-1,
num_heads=9,
position_embedding_dim=-1,
position_magnitude=1,
kv_stride=2,
q_stride=1,
attention_type='1111'):
super(GeneralizedAttention, self).__init__()
# hard range means local range for non-local operation
self.position_embedding_dim = (
position_embedding_dim if position_embedding_dim > 0 else in_dim)
self.position_magnitude = position_magnitude
self.num_heads = num_heads
self.channel_in = in_dim
self.spatial_range = spatial_range
self.kv_stride = kv_stride
self.q_stride = q_stride
self.attention_type = [bool(int(_)) for _ in attention_type]
self.qk_embed_dim = in_dim // num_heads
out_c = self.qk_embed_dim * num_heads
if self.attention_type[0] or self.attention_type[1]:
self.query_conv = nn.Conv2d(
in_channels=in_dim,
out_channels=out_c,
kernel_size=1,
bias=False)
self.query_conv.kaiming_init = True
if self.attention_type[0] or self.attention_type[2]:
self.key_conv = nn.Conv2d(
in_channels=in_dim,
out_channels=out_c,
kernel_size=1,
bias=False)
self.key_conv.kaiming_init = True
self.v_dim = in_dim // num_heads
self.value_conv = nn.Conv2d(
in_channels=in_dim,
out_channels=self.v_dim * num_heads,
kernel_size=1,
bias=False)
self.value_conv.kaiming_init = True
if self.attention_type[1] or self.attention_type[3]:
self.appr_geom_fc_x = nn.Linear(
self.position_embedding_dim // 2, out_c, bias=False)
self.appr_geom_fc_x.kaiming_init = True
self.appr_geom_fc_y = nn.Linear(
self.position_embedding_dim // 2, out_c, bias=False)
self.appr_geom_fc_y.kaiming_init = True
if self.attention_type[2]:
stdv = 1.0 / math.sqrt(self.qk_embed_dim * 2)
appr_bias_value = -2 * stdv * torch.rand(out_c) + stdv
self.appr_bias = nn.Parameter(appr_bias_value)
if self.attention_type[3]:
stdv = 1.0 / math.sqrt(self.qk_embed_dim * 2)
geom_bias_value = -2 * stdv * torch.rand(out_c) + stdv
self.geom_bias = nn.Parameter(geom_bias_value)
self.proj_conv = nn.Conv2d(
in_channels=self.v_dim * num_heads,
out_channels=in_dim,
kernel_size=1,
bias=True)
self.proj_conv.kaiming_init = True
self.gamma = nn.Parameter(torch.zeros(1))
if self.spatial_range >= 0:
# only works when non local is after 3*3 conv
if in_dim == 256:
max_len = 84
elif in_dim == 512:
max_len = 42
max_len_kv = int((max_len - 1.0) / self.kv_stride + 1)
local_constraint_map = np.ones(
(max_len, max_len, max_len_kv, max_len_kv), dtype=np.int)
for iy in range(max_len):
for ix in range(max_len):
local_constraint_map[iy, ix,
max((iy - self.spatial_range) //
self.kv_stride, 0):min(
(iy + self.spatial_range +
1) // self.kv_stride +
1, max_len),
max((ix - self.spatial_range) //
self.kv_stride, 0):min(
(ix + self.spatial_range +
1) // self.kv_stride +
1, max_len)] = 0
self.local_constraint_map = nn.Parameter(
torch.from_numpy(local_constraint_map).byte(),
requires_grad=False)
if self.q_stride > 1:
self.q_downsample = nn.AvgPool2d(
kernel_size=1, stride=self.q_stride)
else:
self.q_downsample = None
if self.kv_stride > 1:
self.kv_downsample = nn.AvgPool2d(
kernel_size=1, stride=self.kv_stride)
else:
self.kv_downsample = None
self.init_weights()
def get_position_embedding(self,
h,
w,
h_kv,
w_kv,
q_stride,
kv_stride,
device,
feat_dim,
wave_length=1000):
h_idxs = torch.linspace(0, h - 1, h).cuda(device)
h_idxs = h_idxs.view((h, 1)) * q_stride
w_idxs = torch.linspace(0, w - 1, w).cuda(device)
w_idxs = w_idxs.view((w, 1)) * q_stride
h_kv_idxs = torch.linspace(0, h_kv - 1, h_kv).cuda(device)
h_kv_idxs = h_kv_idxs.view((h_kv, 1)) * kv_stride
w_kv_idxs = torch.linspace(0, w_kv - 1, w_kv).cuda(device)
w_kv_idxs = w_kv_idxs.view((w_kv, 1)) * kv_stride
# (h, h_kv, 1)
h_diff = h_idxs.unsqueeze(1) - h_kv_idxs.unsqueeze(0)
h_diff *= self.position_magnitude
# (w, w_kv, 1)
w_diff = w_idxs.unsqueeze(1) - w_kv_idxs.unsqueeze(0)
w_diff *= self.position_magnitude
feat_range = torch.arange(0, feat_dim / 4).cuda(device)
dim_mat = torch.Tensor([wave_length]).cuda(device)
dim_mat = dim_mat**((4. / feat_dim) * feat_range)
dim_mat = dim_mat.view((1, 1, -1))
embedding_x = torch.cat(
((w_diff / dim_mat).sin(), (w_diff / dim_mat).cos()), dim=2)
embedding_y = torch.cat(
((h_diff / dim_mat).sin(), (h_diff / dim_mat).cos()), dim=2)
return embedding_x, embedding_y
def forward(self, x_input):
num_heads = self.num_heads
# use empirical_attention
if self.q_downsample is not None:
x_q = self.q_downsample(x_input)
else:
x_q = x_input
n, _, h, w = x_q.shape
if self.kv_downsample is not None:
x_kv = self.kv_downsample(x_input)
else:
x_kv = x_input
_, _, h_kv, w_kv = x_kv.shape
if self.attention_type[0] or self.attention_type[1]:
proj_query = self.query_conv(x_q).view(
(n, num_heads, self.qk_embed_dim, h * w))
proj_query = proj_query.permute(0, 1, 3, 2)
if self.attention_type[0] or self.attention_type[2]:
proj_key = self.key_conv(x_kv).view(
(n, num_heads, self.qk_embed_dim, h_kv * w_kv))
if self.attention_type[1] or self.attention_type[3]:
position_embed_x, position_embed_y = self.get_position_embedding(
h, w, h_kv, w_kv, self.q_stride, self.kv_stride,
x_input.device, self.position_embedding_dim)
# (n, num_heads, w, w_kv, dim)
position_feat_x = self.appr_geom_fc_x(position_embed_x).\
view(1, w, w_kv, num_heads, self.qk_embed_dim).\
permute(0, 3, 1, 2, 4).\
repeat(n, 1, 1, 1, 1)
# (n, num_heads, h, h_kv, dim)
position_feat_y = self.appr_geom_fc_y(position_embed_y).\
view(1, h, h_kv, num_heads, self.qk_embed_dim).\
permute(0, 3, 1, 2, 4).\
repeat(n, 1, 1, 1, 1)
position_feat_x /= math.sqrt(2)
position_feat_y /= math.sqrt(2)
# accelerate for saliency only
if (np.sum(self.attention_type) == 1) and self.attention_type[2]:
appr_bias = self.appr_bias.\
view(1, num_heads, 1, self.qk_embed_dim).\
repeat(n, 1, 1, 1)
energy = torch.matmul(appr_bias, proj_key).\
view(n, num_heads, 1, h_kv * w_kv)
h = 1
w = 1
else:
# (n, num_heads, h*w, h_kv*w_kv), query before key, 540mb for
if not self.attention_type[0]:
energy = torch.zeros(
n,
num_heads,
h,
w,
h_kv,
w_kv,
dtype=x_input.dtype,
device=x_input.device)
# attention_type[0]: appr - appr
# attention_type[1]: appr - position
# attention_type[2]: bias - appr
# attention_type[3]: bias - position
if self.attention_type[0] or self.attention_type[2]:
if self.attention_type[0] and self.attention_type[2]:
appr_bias = self.appr_bias.\
view(1, num_heads, 1, self.qk_embed_dim)
energy = torch.matmul(proj_query + appr_bias, proj_key).\
view(n, num_heads, h, w, h_kv, w_kv)
elif self.attention_type[0]:
energy = torch.matmul(proj_query, proj_key).\
view(n, num_heads, h, w, h_kv, w_kv)
elif self.attention_type[2]:
appr_bias = self.appr_bias.\
view(1, num_heads, 1, self.qk_embed_dim).\
repeat(n, 1, 1, 1)
energy += torch.matmul(appr_bias, proj_key).\
view(n, num_heads, 1, 1, h_kv, w_kv)
if self.attention_type[1] or self.attention_type[3]:
if self.attention_type[1] and self.attention_type[3]:
geom_bias = self.geom_bias.\
view(1, num_heads, 1, self.qk_embed_dim)
proj_query_reshape = (proj_query + geom_bias).\
view(n, num_heads, h, w, self.qk_embed_dim)
energy_x = torch.matmul(
proj_query_reshape.permute(0, 1, 3, 2, 4),
position_feat_x.permute(0, 1, 2, 4, 3))
energy_x = energy_x.\
permute(0, 1, 3, 2, 4).unsqueeze(4)
energy_y = torch.matmul(
proj_query_reshape,
position_feat_y.permute(0, 1, 2, 4, 3))
energy_y = energy_y.unsqueeze(5)
energy += energy_x + energy_y
elif self.attention_type[1]:
proj_query_reshape = proj_query.\
view(n, num_heads, h, w, self.qk_embed_dim)
proj_query_reshape = proj_query_reshape.\
permute(0, 1, 3, 2, 4)
position_feat_x_reshape = position_feat_x.\
permute(0, 1, 2, 4, 3)
position_feat_y_reshape = position_feat_y.\
permute(0, 1, 2, 4, 3)
energy_x = torch.matmul(proj_query_reshape,
position_feat_x_reshape)
energy_x = energy_x.permute(0, 1, 3, 2, 4).unsqueeze(4)
energy_y = torch.matmul(proj_query_reshape,
position_feat_y_reshape)
energy_y = energy_y.unsqueeze(5)
energy += energy_x + energy_y
elif self.attention_type[3]:
geom_bias = self.geom_bias.\
view(1, num_heads, self.qk_embed_dim, 1).\
repeat(n, 1, 1, 1)
position_feat_x_reshape = position_feat_x.\
view(n, num_heads, w*w_kv, self.qk_embed_dim)
position_feat_y_reshape = position_feat_y.\
view(n, num_heads, h * h_kv, self.qk_embed_dim)
energy_x = torch.matmul(position_feat_x_reshape, geom_bias)
energy_x = energy_x.view(n, num_heads, 1, w, 1, w_kv)
energy_y = torch.matmul(position_feat_y_reshape, geom_bias)
energy_y = energy_y.view(n, num_heads, h, 1, h_kv, 1)
energy += energy_x + energy_y
energy = energy.view(n, num_heads, h * w, h_kv * w_kv)
if self.spatial_range >= 0:
cur_local_constraint_map = \
self.local_constraint_map[:h, :w, :h_kv, :w_kv].\
contiguous().\
view(1, 1, h*w, h_kv*w_kv)
energy = energy.masked_fill_(cur_local_constraint_map,
float('-inf'))
attention = F.softmax(energy, 3)
proj_value = self.value_conv(x_kv)
proj_value_reshape = proj_value.\
view((n, num_heads, self.v_dim, h_kv * w_kv)).\
permute(0, 1, 3, 2)
out = torch.matmul(attention, proj_value_reshape).\
permute(0, 1, 3, 2).\
contiguous().\
view(n, self.v_dim * self.num_heads, h, w)
out = self.proj_conv(out)
out = self.gamma * out + x_input
return out
def init_weights(self):
for m in self.modules():
if hasattr(m, 'kaiming_init') and m.kaiming_init:
kaiming_init(
m,
mode='fan_in',
nonlinearity='leaky_relu',
bias=0,
distribution='uniform',
a=1)
| 15,139
| 38.324675
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/necks/fpn.py
|
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import xavier_init
from mmdet.core import auto_fp16
from ..registry import NECKS
from ..utils import ConvModule
@NECKS.register_module
class FPN(nn.Module):
def __init__(self,
in_channels,
out_channels,
num_outs,
start_level=0,
end_level=-1,
add_extra_convs=False,
extra_convs_on_inputs=True,
relu_before_extra_convs=False,
no_norm_on_lateral=False,
conv_cfg=None,
norm_cfg=None,
activation=None):
super(FPN, self).__init__()
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
self.activation = activation
self.relu_before_extra_convs = relu_before_extra_convs
self.no_norm_on_lateral = no_norm_on_lateral
self.fp16_enabled = False
if end_level == -1:
self.backbone_end_level = self.num_ins
assert num_outs >= self.num_ins - start_level
else:
# if end_level < inputs, no extra level is allowed
self.backbone_end_level = end_level
assert end_level <= len(in_channels)
assert num_outs == end_level - start_level
self.start_level = start_level
self.end_level = end_level
self.add_extra_convs = add_extra_convs
self.extra_convs_on_inputs = extra_convs_on_inputs
self.lateral_convs = nn.ModuleList()
self.fpn_convs = nn.ModuleList()
for i in range(self.start_level, self.backbone_end_level):
l_conv = ConvModule(
in_channels[i],
out_channels,
1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg if not self.no_norm_on_lateral else None,
activation=self.activation,
inplace=False)
fpn_conv = ConvModule(
out_channels,
out_channels,
3,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
activation=self.activation,
inplace=False)
self.lateral_convs.append(l_conv)
self.fpn_convs.append(fpn_conv)
# add extra conv layers (e.g., RetinaNet)
extra_levels = num_outs - self.backbone_end_level + self.start_level
if add_extra_convs and extra_levels >= 1:
for i in range(extra_levels):
if i == 0 and self.extra_convs_on_inputs:
in_channels = self.in_channels[self.backbone_end_level - 1]
else:
in_channels = out_channels
extra_fpn_conv = ConvModule(
in_channels,
out_channels,
3,
stride=2,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
activation=self.activation,
inplace=False)
self.fpn_convs.append(extra_fpn_conv)
# default init_weights for conv(msra) and norm in ConvModule
def init_weights(self):
for m in self.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform')
@auto_fp16()
def forward(self, inputs):
assert len(inputs) == len(self.in_channels)
# build laterals
laterals = [
lateral_conv(inputs[i + self.start_level])
for i, lateral_conv in enumerate(self.lateral_convs)
]
# build top-down path
used_backbone_levels = len(laterals)
for i in range(used_backbone_levels - 1, 0, -1):
laterals[i - 1] += F.interpolate(
laterals[i], scale_factor=2, mode='nearest')
# build outputs
# part 1: from original levels
outs = [
self.fpn_convs[i](laterals[i]) for i in range(used_backbone_levels)
]
# part 2: add extra levels
if self.num_outs > len(outs):
# use max pool to get more levels on top of outputs
# (e.g., Faster R-CNN, Mask R-CNN)
if not self.add_extra_convs:
for i in range(self.num_outs - used_backbone_levels):
outs.append(F.max_pool2d(outs[-1], 1, stride=2))
# add conv layers on top of original feature maps (RetinaNet)
else:
if self.extra_convs_on_inputs:
orig = inputs[self.backbone_end_level - 1]
outs.append(self.fpn_convs[used_backbone_levels](orig))
else:
outs.append(self.fpn_convs[used_backbone_levels](outs[-1]))
for i in range(used_backbone_levels + 1, self.num_outs):
if self.relu_before_extra_convs:
outs.append(self.fpn_convs[i](F.relu(outs[-1])))
else:
outs.append(self.fpn_convs[i](outs[-1]))
return tuple(outs)
| 5,289
| 36.253521
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/necks/__init__.py
|
from .bfp import BFP
from .fpn import FPN
from .hrfpn import HRFPN
__all__ = ['FPN', 'BFP', 'HRFPN']
| 102
| 16.166667
| 33
|
py
|
s2anet
|
s2anet-master/mmdet/models/necks/bfp.py
|
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import xavier_init
from ..plugins import NonLocal2D
from ..registry import NECKS
from ..utils import ConvModule
@NECKS.register_module
class BFP(nn.Module):
"""BFP (Balanced Feature Pyrmamids)
BFP takes multi-level features as inputs and gather them into a single one,
then refine the gathered feature and scatter the refined results to
multi-level features. This module is used in Libra R-CNN (CVPR 2019), see
https://arxiv.org/pdf/1904.02701.pdf for details.
Args:
in_channels (int): Number of input channels (feature maps of all levels
should have the same channels).
num_levels (int): Number of input feature levels.
conv_cfg (dict): The config dict for convolution layers.
norm_cfg (dict): The config dict for normalization layers.
refine_level (int): Index of integration and refine level of BSF in
multi-level features from bottom to top.
refine_type (str): Type of the refine op, currently support
[None, 'conv', 'non_local'].
"""
def __init__(self,
in_channels,
num_levels,
refine_level=2,
refine_type=None,
conv_cfg=None,
norm_cfg=None):
super(BFP, self).__init__()
assert refine_type in [None, 'conv', 'non_local']
self.in_channels = in_channels
self.num_levels = num_levels
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.refine_level = refine_level
self.refine_type = refine_type
assert 0 <= self.refine_level < self.num_levels
if self.refine_type == 'conv':
self.refine = ConvModule(
self.in_channels,
self.in_channels,
3,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg)
elif self.refine_type == 'non_local':
self.refine = NonLocal2D(
self.in_channels,
reduction=1,
use_scale=False,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg)
def init_weights(self):
for m in self.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform')
def forward(self, inputs):
assert len(inputs) == self.num_levels
# step 1: gather multi-level features by resize and average
feats = []
gather_size = inputs[self.refine_level].size()[2:]
for i in range(self.num_levels):
if i < self.refine_level:
gathered = F.adaptive_max_pool2d(
inputs[i], output_size=gather_size)
else:
gathered = F.interpolate(
inputs[i], size=gather_size, mode='nearest')
feats.append(gathered)
bsf = sum(feats) / len(feats)
# step 2: refine gathered features
if self.refine_type is not None:
bsf = self.refine(bsf)
# step 3: scatter refined features to multi-levels by a residual path
outs = []
for i in range(self.num_levels):
out_size = inputs[i].size()[2:]
if i < self.refine_level:
residual = F.interpolate(bsf, size=out_size, mode='nearest')
else:
residual = F.adaptive_max_pool2d(bsf, output_size=out_size)
outs.append(residual + inputs[i])
return tuple(outs)
| 3,598
| 33.941748
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/necks/hrfpn.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn.weight_init import caffe2_xavier_init
from torch.utils.checkpoint import checkpoint
from ..registry import NECKS
from ..utils import ConvModule
@NECKS.register_module
class HRFPN(nn.Module):
"""HRFPN (High Resolution Feature Pyrmamids)
arXiv: https://arxiv.org/abs/1904.04514
Args:
in_channels (list): number of channels for each branch.
out_channels (int): output channels of feature pyramids.
num_outs (int): number of output stages.
pooling_type (str): pooling for generating feature pyramids
from {MAX, AVG}.
conv_cfg (dict): dictionary to construct and config conv layer.
norm_cfg (dict): dictionary to construct and config norm layer.
with_cp (bool): Use checkpoint or not. Using checkpoint will save some
memory while slowing down the training speed.
stride (int): stride of 3x3 convolutional layers
"""
def __init__(self,
in_channels,
out_channels,
num_outs=5,
pooling_type='AVG',
conv_cfg=None,
norm_cfg=None,
with_cp=False,
stride=1):
super(HRFPN, self).__init__()
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
self.with_cp = with_cp
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.reduction_conv = ConvModule(
sum(in_channels),
out_channels,
kernel_size=1,
conv_cfg=self.conv_cfg,
activation=None)
self.fpn_convs = nn.ModuleList()
for i in range(self.num_outs):
self.fpn_convs.append(
ConvModule(
out_channels,
out_channels,
kernel_size=3,
padding=1,
stride=stride,
conv_cfg=self.conv_cfg,
activation=None))
if pooling_type == 'MAX':
self.pooling = F.max_pool2d
else:
self.pooling = F.avg_pool2d
def init_weights(self):
for m in self.modules():
if isinstance(m, nn.Conv2d):
caffe2_xavier_init(m)
def forward(self, inputs):
assert len(inputs) == self.num_ins
outs = [inputs[0]]
for i in range(1, self.num_ins):
outs.append(
F.interpolate(inputs[i], scale_factor=2**i, mode='bilinear'))
out = torch.cat(outs, dim=1)
if out.requires_grad and self.with_cp:
out = checkpoint(self.reduction_conv, out)
else:
out = self.reduction_conv(out)
outs = [out]
for i in range(1, self.num_outs):
outs.append(self.pooling(out, kernel_size=2**i, stride=2**i))
outputs = []
for i in range(self.num_outs):
if outs[i].requires_grad and self.with_cp:
tmp_out = checkpoint(self.fpn_convs[i], outs[i])
else:
tmp_out = self.fpn_convs[i](outs[i])
outputs.append(tmp_out)
return tuple(outputs)
| 3,363
| 32.306931
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/roi_extractors/single_level.py
|
from __future__ import division
import torch
import torch.nn as nn
from mmdet import ops
from mmdet.core import force_fp32
from ..registry import ROI_EXTRACTORS
@ROI_EXTRACTORS.register_module
class SingleRoIExtractor(nn.Module):
"""Extract RoI features from a single level feature map.
If there are mulitple input feature levels, each RoI is mapped to a level
according to its scale.
Args:
roi_layer (dict): Specify RoI layer type and arguments.
out_channels (int): Output channels of RoI layers.
featmap_strides (int): Strides of input feature maps.
finest_scale (int): Scale threshold of mapping to level 0.
"""
def __init__(self,
roi_layer,
out_channels,
featmap_strides,
finest_scale=56):
super(SingleRoIExtractor, self).__init__()
self.roi_layers = self.build_roi_layers(roi_layer, featmap_strides)
self.out_channels = out_channels
self.featmap_strides = featmap_strides
self.finest_scale = finest_scale
self.fp16_enabled = False
@property
def num_inputs(self):
"""int: Input feature map levels."""
return len(self.featmap_strides)
def init_weights(self):
pass
def build_roi_layers(self, layer_cfg, featmap_strides):
cfg = layer_cfg.copy()
layer_type = cfg.pop('type')
assert hasattr(ops, layer_type)
layer_cls = getattr(ops, layer_type)
roi_layers = nn.ModuleList(
[layer_cls(spatial_scale=1 / s, **cfg) for s in featmap_strides])
return roi_layers
def map_roi_levels(self, rois, num_levels):
"""Map rois to corresponding feature levels by scales.
- scale < finest_scale * 2: level 0
- finest_scale * 2 <= scale < finest_scale * 4: level 1
- finest_scale * 4 <= scale < finest_scale * 8: level 2
- scale >= finest_scale * 8: level 3
Args:
rois (Tensor): Input RoIs, shape (k, 5).
num_levels (int): Total level number.
Returns:
Tensor: Level index (0-based) of each RoI, shape (k, )
"""
scale = torch.sqrt(
(rois[:, 3] - rois[:, 1] + 1) * (rois[:, 4] - rois[:, 2] + 1))
target_lvls = torch.floor(torch.log2(scale / self.finest_scale + 1e-6))
target_lvls = target_lvls.clamp(min=0, max=num_levels - 1).long()
return target_lvls
def roi_rescale(self, rois, scale_factor):
cx = (rois[:, 1] + rois[:, 3]) * 0.5
cy = (rois[:, 2] + rois[:, 4]) * 0.5
w = rois[:, 3] - rois[:, 1] + 1
h = rois[:, 4] - rois[:, 2] + 1
new_w = w * scale_factor
new_h = h * scale_factor
x1 = cx - new_w * 0.5 + 0.5
x2 = cx + new_w * 0.5 - 0.5
y1 = cy - new_h * 0.5 + 0.5
y2 = cy + new_h * 0.5 - 0.5
new_rois = torch.stack((rois[:, 0], x1, y1, x2, y2), dim=-1)
return new_rois
@force_fp32(apply_to=('feats', ), out_fp16=True)
def forward(self, feats, rois, roi_scale_factor=None):
if len(feats) == 1:
return self.roi_layers[0](feats[0], rois)
out_size = self.roi_layers[0].out_size
num_levels = len(feats)
target_lvls = self.map_roi_levels(rois, num_levels)
roi_feats = feats[0].new_zeros(
rois.size(0), self.out_channels, *out_size)
if roi_scale_factor is not None:
rois = self.roi_rescale(rois, roi_scale_factor)
for i in range(num_levels):
inds = target_lvls == i
if inds.any():
rois_ = rois[inds, :]
roi_feats_t = self.roi_layers[i](feats[i], rois_)
roi_feats[inds] = roi_feats_t
return roi_feats
| 3,794
| 34.138889
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/roi_extractors/__init__.py
|
from .single_level import SingleRoIExtractor
from .single_level_rotated import SingleRoIExtractorRotated
__all__ = ['SingleRoIExtractor', 'SingleRoIExtractorRotated']
| 168
| 32.8
| 61
|
py
|
s2anet
|
s2anet-master/mmdet/models/roi_extractors/single_level_rotated.py
|
from __future__ import division
import torch
from .single_level import SingleRoIExtractor
from ..registry import ROI_EXTRACTORS
@ROI_EXTRACTORS.register_module
class SingleRoIExtractorRotated(SingleRoIExtractor):
def map_roi_levels(self, rois, num_levels):
"""Map rois to corresponding feature levels by scales.
- scale < finest_scale * 2: level 0
- finest_scale * 2 <= scale < finest_scale * 4: level 1
- finest_scale * 4 <= scale < finest_scale * 8: level 2
- scale >= finest_scale * 8: level 3
Args:
rois (Tensor): Input RoIs, shape (k, 5).
num_levels (int): Total level number.
Returns:
Tensor: Level index (0-based) of each RoI, shape (k, )
"""
scale = torch.sqrt((rois[:, 3] + 1) * (rois[:, 4] + 1))
target_lvls = torch.floor(torch.log2(scale / self.finest_scale + 1e-6))
target_lvls = target_lvls.clamp(min=0, max=num_levels - 1).long()
return target_lvls
def roi_rescale(self, rois, scale_factor):
cx = rois[:, 1]
cy = rois[:, 2]
w = rois[:, 3] + 1
h = rois[:, 4] + 1
a = rois[:, 5]
new_w = w * scale_factor
new_h = h * scale_factor
new_rois = torch.stack((rois[:, 0], cx, cy, new_w, new_h, a), dim=-1)
return new_rois
| 1,348
| 31.119048
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/reppoints_head.py
|
from __future__ import division
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import (PointGenerator, multi_apply, multiclass_nms,
point_target)
from mmdet.ops import DeformConv
from ..builder import build_loss
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
@HEADS.register_module
class RepPointsHead(nn.Module):
"""RepPoint head.
Args:
in_channels (int): Number of channels in the input feature map.
feat_channels (int): Number of channels of the feature map.
point_feat_channels (int): Number of channels of points features.
stacked_convs (int): How many conv layers are used.
gradient_mul (float): The multiplier to gradients from
points refinement and recognition.
point_strides (Iterable): points strides.
point_base_scale (int): bbox scale for assigning labels.
loss_cls (dict): Config of classification loss.
loss_bbox_init (dict): Config of initial points loss.
loss_bbox_refine (dict): Config of points loss in refinement.
use_grid_points (bool): If we use bounding box representation, the
reppoints is represented as grid points on the bounding box.
center_init (bool): Whether to use center point assignment.
transform_method (str): The methods to transform RepPoints to bbox.
""" # noqa: W605
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
point_feat_channels=256,
stacked_convs=3,
num_points=9,
gradient_mul=0.1,
point_strides=[8, 16, 32, 64, 128],
point_base_scale=4,
conv_cfg=None,
norm_cfg=None,
loss_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_bbox_init=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=0.5),
loss_bbox_refine=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.0),
use_grid_points=False,
center_init=True,
transform_method='moment',
moment_mul=0.01):
super(RepPointsHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.point_feat_channels = point_feat_channels
self.stacked_convs = stacked_convs
self.num_points = num_points
self.gradient_mul = gradient_mul
self.point_base_scale = point_base_scale
self.point_strides = point_strides
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.sampling = loss_cls['type'] not in ['FocalLoss']
self.loss_cls = build_loss(loss_cls)
self.loss_bbox_init = build_loss(loss_bbox_init)
self.loss_bbox_refine = build_loss(loss_bbox_refine)
self.use_grid_points = use_grid_points
self.center_init = center_init
self.transform_method = transform_method
if self.transform_method == 'moment':
self.moment_transfer = nn.Parameter(
data=torch.zeros(2), requires_grad=True)
self.moment_mul = moment_mul
if self.use_sigmoid_cls:
self.cls_out_channels = self.num_classes - 1
else:
self.cls_out_channels = self.num_classes
self.point_generators = [PointGenerator() for _ in self.point_strides]
# we use deformable conv to extract points features
self.dcn_kernel = int(np.sqrt(num_points))
self.dcn_pad = int((self.dcn_kernel - 1) / 2)
assert self.dcn_kernel * self.dcn_kernel == num_points, \
"The points number should be a square number."
assert self.dcn_kernel % 2 == 1, \
"The points number should be an odd square number."
dcn_base = np.arange(-self.dcn_pad,
self.dcn_pad + 1).astype(np.float64)
dcn_base_y = np.repeat(dcn_base, self.dcn_kernel)
dcn_base_x = np.tile(dcn_base, self.dcn_kernel)
dcn_base_offset = np.stack([dcn_base_y, dcn_base_x], axis=1).reshape(
(-1))
self.dcn_base_offset = torch.tensor(dcn_base_offset).view(1, -1, 1, 1)
self._init_layers()
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
pts_out_dim = 4 if self.use_grid_points else 2 * self.num_points
self.reppoints_cls_conv = DeformConv(self.feat_channels,
self.point_feat_channels,
self.dcn_kernel, 1, self.dcn_pad)
self.reppoints_cls_out = nn.Conv2d(self.point_feat_channels,
self.cls_out_channels, 1, 1, 0)
self.reppoints_pts_init_conv = nn.Conv2d(self.feat_channels,
self.point_feat_channels, 3,
1, 1)
self.reppoints_pts_init_out = nn.Conv2d(self.point_feat_channels,
pts_out_dim, 1, 1, 0)
self.reppoints_pts_refine_conv = DeformConv(self.feat_channels,
self.point_feat_channels,
self.dcn_kernel, 1,
self.dcn_pad)
self.reppoints_pts_refine_out = nn.Conv2d(self.point_feat_channels,
pts_out_dim, 1, 1, 0)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.reppoints_cls_conv, std=0.01)
normal_init(self.reppoints_cls_out, std=0.01, bias=bias_cls)
normal_init(self.reppoints_pts_init_conv, std=0.01)
normal_init(self.reppoints_pts_init_out, std=0.01)
normal_init(self.reppoints_pts_refine_conv, std=0.01)
normal_init(self.reppoints_pts_refine_out, std=0.01)
def points2bbox(self, pts, y_first=True):
"""
Converting the points set into bounding box.
:param pts: the input points sets (fields), each points
set (fields) is represented as 2n scalar.
:param y_first: if y_fisrt=True, the point set is represented as
[y1, x1, y2, x2 ... yn, xn], otherwise the point set is
represented as [x1, y1, x2, y2 ... xn, yn].
:return: each points set is converting to a bbox [x1, y1, x2, y2].
"""
pts_reshape = pts.view(pts.shape[0], -1, 2, *pts.shape[2:])
pts_y = pts_reshape[:, :, 0, ...] if y_first else pts_reshape[:, :, 1,
...]
pts_x = pts_reshape[:, :, 1, ...] if y_first else pts_reshape[:, :, 0,
...]
if self.transform_method == 'minmax':
bbox_left = pts_x.min(dim=1, keepdim=True)[0]
bbox_right = pts_x.max(dim=1, keepdim=True)[0]
bbox_up = pts_y.min(dim=1, keepdim=True)[0]
bbox_bottom = pts_y.max(dim=1, keepdim=True)[0]
bbox = torch.cat([bbox_left, bbox_up, bbox_right, bbox_bottom],
dim=1)
elif self.transform_method == 'partial_minmax':
pts_y = pts_y[:, :4, ...]
pts_x = pts_x[:, :4, ...]
bbox_left = pts_x.min(dim=1, keepdim=True)[0]
bbox_right = pts_x.max(dim=1, keepdim=True)[0]
bbox_up = pts_y.min(dim=1, keepdim=True)[0]
bbox_bottom = pts_y.max(dim=1, keepdim=True)[0]
bbox = torch.cat([bbox_left, bbox_up, bbox_right, bbox_bottom],
dim=1)
elif self.transform_method == 'moment':
pts_y_mean = pts_y.mean(dim=1, keepdim=True)
pts_x_mean = pts_x.mean(dim=1, keepdim=True)
pts_y_std = torch.std(pts_y - pts_y_mean, dim=1, keepdim=True)
pts_x_std = torch.std(pts_x - pts_x_mean, dim=1, keepdim=True)
moment_transfer = (self.moment_transfer * self.moment_mul) + (
self.moment_transfer.detach() * (1 - self.moment_mul))
moment_width_transfer = moment_transfer[0]
moment_height_transfer = moment_transfer[1]
half_width = pts_x_std * torch.exp(moment_width_transfer)
half_height = pts_y_std * torch.exp(moment_height_transfer)
bbox = torch.cat([
pts_x_mean - half_width, pts_y_mean - half_height,
pts_x_mean + half_width, pts_y_mean + half_height
],
dim=1)
else:
raise NotImplementedError
return bbox
def gen_grid_from_reg(self, reg, previous_boxes):
"""
Base on the previous bboxes and regression values, we compute the
regressed bboxes and generate the grids on the bboxes.
:param reg: the regression value to previous bboxes.
:param previous_boxes: previous bboxes.
:return: generate grids on the regressed bboxes.
"""
b, _, h, w = reg.shape
bxy = (previous_boxes[:, :2, ...] + previous_boxes[:, 2:, ...]) / 2.
bwh = (previous_boxes[:, 2:, ...] -
previous_boxes[:, :2, ...]).clamp(min=1e-6)
grid_topleft = bxy + bwh * reg[:, :2, ...] - 0.5 * bwh * torch.exp(
reg[:, 2:, ...])
grid_wh = bwh * torch.exp(reg[:, 2:, ...])
grid_left = grid_topleft[:, [0], ...]
grid_top = grid_topleft[:, [1], ...]
grid_width = grid_wh[:, [0], ...]
grid_height = grid_wh[:, [1], ...]
intervel = torch.linspace(0., 1., self.dcn_kernel).view(
1, self.dcn_kernel, 1, 1).type_as(reg)
grid_x = grid_left + grid_width * intervel
grid_x = grid_x.unsqueeze(1).repeat(1, self.dcn_kernel, 1, 1, 1)
grid_x = grid_x.view(b, -1, h, w)
grid_y = grid_top + grid_height * intervel
grid_y = grid_y.unsqueeze(2).repeat(1, 1, self.dcn_kernel, 1, 1)
grid_y = grid_y.view(b, -1, h, w)
grid_yx = torch.stack([grid_y, grid_x], dim=2)
grid_yx = grid_yx.view(b, -1, h, w)
regressed_bbox = torch.cat([
grid_left, grid_top, grid_left + grid_width, grid_top + grid_height
], 1)
return grid_yx, regressed_bbox
def forward_single(self, x):
dcn_base_offset = self.dcn_base_offset.type_as(x)
# If we use center_init, the initial reppoints is from center points.
# If we use bounding bbox representation, the initial reppoints is
# from regular grid placed on a pre-defined bbox.
if self.use_grid_points or not self.center_init:
scale = self.point_base_scale / 2
points_init = dcn_base_offset / dcn_base_offset.max() * scale
bbox_init = x.new_tensor([-scale, -scale, scale,
scale]).view(1, 4, 1, 1)
else:
points_init = 0
cls_feat = x
pts_feat = x
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
for reg_conv in self.reg_convs:
pts_feat = reg_conv(pts_feat)
# initialize reppoints
pts_out_init = self.reppoints_pts_init_out(
self.relu(self.reppoints_pts_init_conv(pts_feat)))
if self.use_grid_points:
pts_out_init, bbox_out_init = self.gen_grid_from_reg(
pts_out_init, bbox_init.detach())
else:
pts_out_init = pts_out_init + points_init
# refine and classify reppoints
pts_out_init_grad_mul = (1 - self.gradient_mul) * pts_out_init.detach(
) + self.gradient_mul * pts_out_init
dcn_offset = pts_out_init_grad_mul - dcn_base_offset
cls_out = self.reppoints_cls_out(
self.relu(self.reppoints_cls_conv(cls_feat, dcn_offset)))
pts_out_refine = self.reppoints_pts_refine_out(
self.relu(self.reppoints_pts_refine_conv(pts_feat, dcn_offset)))
if self.use_grid_points:
pts_out_refine, bbox_out_refine = self.gen_grid_from_reg(
pts_out_refine, bbox_out_init.detach())
else:
pts_out_refine = pts_out_refine + pts_out_init.detach()
return cls_out, pts_out_init, pts_out_refine
def forward(self, feats):
return multi_apply(self.forward_single, feats)
def get_points(self, featmap_sizes, img_metas):
"""Get points according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
img_metas (list[dict]): Image meta info.
Returns:
tuple: points of each image, valid flags of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# points center for one time
multi_level_points = []
for i in range(num_levels):
points = self.point_generators[i].grid_points(
featmap_sizes[i], self.point_strides[i])
multi_level_points.append(points)
points_list = [[point.clone() for point in multi_level_points]
for _ in range(num_imgs)]
# for each image, we compute valid flags of multi level grids
valid_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
point_stride = self.point_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / point_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / point_stride)), feat_w)
flags = self.point_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w))
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return points_list, valid_flag_list
def centers_to_bboxes(self, point_list):
"""Get bboxes according to center points. Only used in MaxIOUAssigner.
"""
bbox_list = []
for i_img, point in enumerate(point_list):
bbox = []
for i_lvl in range(len(self.point_strides)):
scale = self.point_base_scale * self.point_strides[i_lvl] * 0.5
bbox_shift = torch.Tensor([-scale, -scale, scale,
scale]).view(1, 4).type_as(point[0])
bbox_center = torch.cat(
[point[i_lvl][:, :2], point[i_lvl][:, :2]], dim=1)
bbox.append(bbox_center + bbox_shift)
bbox_list.append(bbox)
return bbox_list
def offset_to_pts(self, center_list, pred_list):
"""Change from point offset to point coordinate.
"""
pts_list = []
for i_lvl in range(len(self.point_strides)):
pts_lvl = []
for i_img in range(len(center_list)):
pts_center = center_list[i_img][i_lvl][:, :2].repeat(
1, self.num_points)
pts_shift = pred_list[i_lvl][i_img]
yx_pts_shift = pts_shift.permute(1, 2, 0).view(
-1, 2 * self.num_points)
y_pts_shift = yx_pts_shift[..., 0::2]
x_pts_shift = yx_pts_shift[..., 1::2]
xy_pts_shift = torch.stack([x_pts_shift, y_pts_shift], -1)
xy_pts_shift = xy_pts_shift.view(*yx_pts_shift.shape[:-1], -1)
pts = xy_pts_shift * self.point_strides[i_lvl] + pts_center
pts_lvl.append(pts)
pts_lvl = torch.stack(pts_lvl, 0)
pts_list.append(pts_lvl)
return pts_list
def loss_single(self, cls_score, pts_pred_init, pts_pred_refine, labels,
label_weights, bbox_gt_init, bbox_weights_init,
bbox_gt_refine, bbox_weights_refine, stride,
num_total_samples_init, num_total_samples_refine):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
cls_score = cls_score.permute(0, 2, 3,
1).reshape(-1, self.cls_out_channels)
loss_cls = self.loss_cls(
cls_score,
labels,
label_weights,
avg_factor=num_total_samples_refine)
# points loss
bbox_gt_init = bbox_gt_init.reshape(-1, 4)
bbox_weights_init = bbox_weights_init.reshape(-1, 4)
bbox_pred_init = self.points2bbox(
pts_pred_init.reshape(-1, 2 * self.num_points), y_first=False)
bbox_gt_refine = bbox_gt_refine.reshape(-1, 4)
bbox_weights_refine = bbox_weights_refine.reshape(-1, 4)
bbox_pred_refine = self.points2bbox(
pts_pred_refine.reshape(-1, 2 * self.num_points), y_first=False)
normalize_term = self.point_base_scale * stride
loss_pts_init = self.loss_bbox_init(
bbox_pred_init / normalize_term,
bbox_gt_init / normalize_term,
bbox_weights_init,
avg_factor=num_total_samples_init)
loss_pts_refine = self.loss_bbox_refine(
bbox_pred_refine / normalize_term,
bbox_gt_refine / normalize_term,
bbox_weights_refine,
avg_factor=num_total_samples_refine)
return loss_cls, loss_pts_init, loss_pts_refine
def loss(self,
cls_scores,
pts_preds_init,
pts_preds_refine,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.point_generators)
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
# target for initial stage
center_list, valid_flag_list = self.get_points(featmap_sizes,
img_metas)
pts_coordinate_preds_init = self.offset_to_pts(center_list,
pts_preds_init)
if cfg.init.assigner['type'] == 'PointAssigner':
# Assign target for center list
candidate_list = center_list
else:
# transform center list to bbox list and
# assign target for bbox list
bbox_list = self.centers_to_bboxes(center_list)
candidate_list = bbox_list
cls_reg_targets_init = point_target(
candidate_list,
valid_flag_list,
gt_bboxes,
img_metas,
cfg.init,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
(*_, bbox_gt_list_init, candidate_list_init, bbox_weights_list_init,
num_total_pos_init, num_total_neg_init) = cls_reg_targets_init
num_total_samples_init = (
num_total_pos_init +
num_total_neg_init if self.sampling else num_total_pos_init)
# target for refinement stage
center_list, valid_flag_list = self.get_points(featmap_sizes,
img_metas)
pts_coordinate_preds_refine = self.offset_to_pts(
center_list, pts_preds_refine)
bbox_list = []
for i_img, center in enumerate(center_list):
bbox = []
for i_lvl in range(len(pts_preds_refine)):
bbox_preds_init = self.points2bbox(
pts_preds_init[i_lvl].detach())
bbox_shift = bbox_preds_init * self.point_strides[i_lvl]
bbox_center = torch.cat(
[center[i_lvl][:, :2], center[i_lvl][:, :2]], dim=1)
bbox.append(bbox_center +
bbox_shift[i_img].permute(1, 2, 0).reshape(-1, 4))
bbox_list.append(bbox)
cls_reg_targets_refine = point_target(
bbox_list,
valid_flag_list,
gt_bboxes,
img_metas,
cfg.refine,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
(labels_list, label_weights_list, bbox_gt_list_refine,
candidate_list_refine, bbox_weights_list_refine, num_total_pos_refine,
num_total_neg_refine) = cls_reg_targets_refine
num_total_samples_refine = (
num_total_pos_refine +
num_total_neg_refine if self.sampling else num_total_pos_refine)
# compute loss
losses_cls, losses_pts_init, losses_pts_refine = multi_apply(
self.loss_single,
cls_scores,
pts_coordinate_preds_init,
pts_coordinate_preds_refine,
labels_list,
label_weights_list,
bbox_gt_list_init,
bbox_weights_list_init,
bbox_gt_list_refine,
bbox_weights_list_refine,
self.point_strides,
num_total_samples_init=num_total_samples_init,
num_total_samples_refine=num_total_samples_refine)
loss_dict_all = {
'loss_cls': losses_cls,
'loss_pts_init': losses_pts_init,
'loss_pts_refine': losses_pts_refine
}
return loss_dict_all
def get_bboxes(self,
cls_scores,
pts_preds_init,
pts_preds_refine,
img_metas,
cfg,
rescale=False,
nms=True):
assert len(cls_scores) == len(pts_preds_refine)
bbox_preds_refine = [
self.points2bbox(pts_pred_refine)
for pts_pred_refine in pts_preds_refine
]
num_levels = len(cls_scores)
mlvl_points = [
self.point_generators[i].grid_points(cls_scores[i].size()[-2:],
self.point_strides[i])
for i in range(num_levels)
]
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds_refine[i][img_id].detach()
for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
mlvl_points, img_shape,
scale_factor, cfg, rescale, nms)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_scores,
bbox_preds,
mlvl_points,
img_shape,
scale_factor,
cfg,
rescale=False,
nms=True):
assert len(cls_scores) == len(bbox_preds) == len(mlvl_points)
mlvl_bboxes = []
mlvl_scores = []
for i_lvl, (cls_score, bbox_pred, points) in enumerate(
zip(cls_scores, bbox_preds, mlvl_points)):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(1, 2,
0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
points = points[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bbox_pos_center = torch.cat([points[:, :2], points[:, :2]], dim=1)
bboxes = bbox_pred * self.point_strides[i_lvl] + bbox_pos_center
x1 = bboxes[:, 0].clamp(min=0, max=img_shape[1])
y1 = bboxes[:, 1].clamp(min=0, max=img_shape[0])
x2 = bboxes[:, 2].clamp(min=0, max=img_shape[1])
y2 = bboxes[:, 3].clamp(min=0, max=img_shape[0])
bboxes = torch.stack([x1, y1, x2, y2], dim=-1)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
if nms:
det_bboxes, det_labels = multiclass_nms(mlvl_bboxes, mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
else:
return mlvl_bboxes, mlvl_scores
| 27,172
| 44.515913
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/fsaf_head.py
|
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import multi_apply, multiclass_nms, distance2bbox
from ..losses import sigmoid_focal_loss
from ..registry import HEADS
from ..utils import bias_init_with_prob, ConvModule
def select_iou_loss(pred, target, weight, avg_factor=None):
if avg_factor is None:
avg_factor = pred.size(0)
assert pred.size(0) == target.size(0)
target = target.clamp(min=0.)
area_pred = (pred[:, 0] + pred[:, 2]) * (pred[:, 1] + pred[:, 3])
area_gt = (target[:, 0] + target[:, 2]) * (target[:, 1] + target[:, 3])
area_i = ((torch.min(pred[:, 0], target[:, 0]) +
torch.min(pred[:, 2], target[:, 2])) *
(torch.min(pred[:, 1], target[:, 1]) +
torch.min(pred[:, 3], target[:, 3])))
area_u = area_pred + area_gt - area_i
iou = area_i / area_u
loc_losses = -torch.log(iou.clamp(min=1e-7))
return torch.sum(weight * loc_losses) / avg_factor
@HEADS.register_module
class FSAFHead(nn.Module):
"""Feature Selective Anchor-Free Head
Args:
num_classes (int): Number of classes.
in_channels (int): Number of channels in the input feature map.
feat_channels (int): Number of channels of the feature map.
stacked_convs (int): Number of conv layers before head.
norm_factor (float): Distance normalization factor.
feat_strides (Iterable): Feature strides.
conv_cfg (dict): The config dict for convolution layers.
norm_cfg (dict): The config dict for normalization layers.
"""
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=4,
norm_factor=4.0,
feat_strides=[8, 16, 32, 64, 128],
conv_cfg=None,
norm_cfg=None):
super(FSAFHead, self).__init__()
self.num_classes = num_classes
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.norm_factor = norm_factor
self.feat_strides = feat_strides
self.cls_out_channels = self.num_classes - 1
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self._init_layers()
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.fsaf_cls = nn.Conv2d(
self.feat_channels, self.cls_out_channels, 3, padding=1)
self.fsaf_reg = nn.Conv2d(self.feat_channels, 4, 3, padding=1)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.fsaf_cls, std=0.01, bias=bias_cls)
normal_init(self.fsaf_reg, std=0.01, bias=0.1)
def forward_single(self, x):
cls_feat = x
reg_feat = x
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
for reg_conv in self.reg_convs:
reg_feat = reg_conv(reg_feat)
cls_score = self.fsaf_cls(cls_feat)
bbox_pred = self.relu(self.fsaf_reg(reg_feat))
return cls_score, bbox_pred
def forward(self, feats):
return multi_apply(self.forward_single, feats)
def loss_single(self, cls_score, bbox_pred, labels, label_weights,
bbox_targets, bbox_locs, num_total_samples, cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
cls_score = cls_score.permute(0, 2, 3,
1).reshape(-1, self.cls_out_channels)
loss_cls = sigmoid_focal_loss(
cls_score,
labels,
weight=label_weights,
gamma=cfg.gamma,
alpha=cfg.alpha,
avg_factor=num_total_samples)
# localization loss
if bbox_targets.size(0) == 0:
loss_bbox = bbox_pred.new_zeros(1)
else:
bbox_pred = bbox_pred.permute(0, 2, 3, 1)
bbox_pred = bbox_pred[bbox_locs[:, 0], bbox_locs[:, 1],
bbox_locs[:, 2], :]
loss_bbox = select_iou_loss(
bbox_pred,
bbox_targets,
cfg.bbox_reg_weight,
avg_factor=num_total_samples)
return loss_cls, loss_bbox
def loss(self,
cls_scores,
bbox_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
cls_reg_targets = self.point_target(
cls_scores,
bbox_preds,
gt_bboxes,
img_metas,
cfg,
gt_labels_list=gt_labels,
gt_bboxes_ignore_list=gt_bboxes_ignore)
# if cls_reg_targets is None:
# return None
(labels_list, label_weights_list, bbox_targets_list, bbox_locs_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = num_total_pos
losses_cls, losses_bbox = multi_apply(
self.loss_single,
cls_scores,
bbox_preds,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_locs_list,
num_total_samples=num_total_samples,
cfg=cfg)
return dict(loss_cls=losses_cls, loss_bbox=losses_bbox)
def point_target(self,
cls_scores,
bbox_preds,
gt_bboxes,
img_metas,
cfg,
gt_labels_list=None,
gt_bboxes_ignore_list=None):
num_imgs = len(img_metas)
# compute targets for each image
if gt_bboxes_ignore_list is None:
gt_bboxes_ignore_list = [None for _ in range(num_imgs)]
if gt_labels_list is None:
gt_labels_list = [None for _ in range(num_imgs)]
# split net outputs w.r.t. images
num_levels = len(self.feat_strides)
assert len(cls_scores) == len(bbox_preds) == num_levels
cls_score_list = []
bbox_pred_list = []
for img_id in range(num_imgs):
cls_score_list.append(
[cls_scores[i][img_id].detach() for i in range(num_levels)])
bbox_pred_list.append(
[bbox_preds[i][img_id].detach() for i in range(num_levels)])
(all_labels, all_label_weights, all_bbox_targets, all_bbox_locs,
num_pos_list, num_neg_list) = multi_apply(
self.point_target_single,
cls_score_list,
bbox_pred_list,
gt_bboxes,
gt_bboxes_ignore_list,
gt_labels_list,
img_metas,
cfg=cfg)
# correct image index in bbox_locs
for i in range(num_imgs):
for lvl in range(num_levels):
all_bbox_locs[i][lvl][:, 0] = i
# sampled points of all images
num_total_pos = sum([max(num, 1) for num in num_pos_list])
num_total_neg = sum([max(num, 1) for num in num_neg_list])
# combine targets to a list w.r.t. multiple levels
labels_list = self.images_to_levels(all_labels, num_imgs, num_levels,
True)
label_weights_list = self.images_to_levels(all_label_weights, num_imgs,
num_levels, True)
bbox_targets_list = self.images_to_levels(all_bbox_targets, num_imgs,
num_levels, False)
bbox_locs_list = self.images_to_levels(all_bbox_locs, num_imgs,
num_levels, False)
return (labels_list, label_weights_list, bbox_targets_list,
bbox_locs_list, num_total_pos, num_total_neg)
def point_target_single(self, cls_score_list, bbox_pred_list, gt_bboxes,
gt_bboxes_ignore, gt_labels, img_meta, cfg):
num_levels = len(self.feat_strides)
assert len(cls_score_list) == len(bbox_pred_list) == num_levels
feat_lvls = self.feat_level_select(cls_score_list, bbox_pred_list,
gt_bboxes, gt_labels, cfg)
labels = []
label_weights = []
bbox_targets = []
bbox_locs = []
device = bbox_pred_list[0].device
img_h, img_w, _ = img_meta['pad_shape']
for lvl in range(num_levels):
stride = self.feat_strides[lvl]
norm = stride * self.norm_factor
inds = torch.nonzero(feat_lvls == lvl).squeeze(-1)
h, w = cls_score_list[lvl].size()[-2:]
valid_h = min(int(np.ceil(img_h / stride)), h)
valid_w = min(int(np.ceil(img_w / stride)), w)
_labels = torch.zeros_like(
cls_score_list[lvl][0], dtype=torch.long)
_label_weights = torch.zeros_like(
cls_score_list[lvl][0], dtype=torch.float)
_label_weights[:valid_h, :valid_w] = 1.
_bbox_targets = bbox_pred_list[lvl].new_zeros((0, 4),
dtype=torch.float)
_bbox_locs = bbox_pred_list[lvl].new_zeros((0, 3),
dtype=torch.long)
if len(inds) > 0:
boxes = gt_bboxes[inds, :]
classes = gt_labels[inds]
proj_boxes = boxes / stride
ig_x1, ig_y1, ig_x2, ig_y2 = self.prop_box_bounds(
proj_boxes, cfg.ignore_scale, w, h)
pos_x1, pos_y1, pos_x2, pos_y2 = self.prop_box_bounds(
proj_boxes, cfg.pos_scale, w, h)
for i in range(len(inds)):
# setup classification ground-truth
_labels[pos_y1[i]:pos_y2[i], pos_x1[i]:
pos_x2[i]] = classes[i]
_label_weights[ig_y1[i]:ig_y2[i], ig_x1[i]:ig_x2[i]] = 0.
_label_weights[pos_y1[i]:pos_y2[i], pos_x1[i]:
pos_x2[i]] = 1.
# setup localization ground-truth
locs_x = torch.arange(
pos_x1[i], pos_x2[i], device=device, dtype=torch.long)
locs_y = torch.arange(
pos_y1[i], pos_y2[i], device=device, dtype=torch.long)
shift_x = (locs_x.float() + 0.5) * stride
shift_y = (locs_y.float() + 0.5) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shifts = torch.stack(
(shift_xx, shift_yy, shift_xx, shift_yy), dim=-1)
shifts[:, 0] = shifts[:, 0] - boxes[i, 0]
shifts[:, 1] = shifts[:, 1] - boxes[i, 1]
shifts[:, 2] = boxes[i, 2] - shifts[:, 2]
shifts[:, 3] = boxes[i, 3] - shifts[:, 3]
_bbox_targets = torch.cat((_bbox_targets, shifts / norm),
dim=0)
locs_xx, locs_yy = self._meshgrid(locs_x, locs_y)
zeros = torch.zeros_like(locs_xx)
locs = torch.stack((zeros, locs_yy, locs_xx), dim=-1)
_bbox_locs = torch.cat((_bbox_locs, locs), dim=0)
labels.append(_labels)
label_weights.append(_label_weights)
bbox_targets.append(_bbox_targets)
bbox_locs.append(_bbox_locs)
# ignore regions in adjacent pyramids
for lvl in range(num_levels):
stride = self.feat_strides[lvl]
w, h = cls_score_list[lvl].size()[-2:]
# lower pyramid if exists
if lvl > 0:
inds = torch.nonzero(feat_lvls == lvl - 1).squeeze(-1)
if len(inds) > 0:
boxes = gt_bboxes[inds, :]
proj_boxes = boxes / stride
ig_x1, ig_y1, ig_x2, ig_y2 = self.prop_box_bounds(
proj_boxes, cfg.ignore_scale, w, h)
for i in range(len(inds)):
label_weights[lvl][ig_y1[i]:ig_y2[i], ig_x1[i]:
ig_x2[i]] = 0.
# upper pyramid if exists
if lvl < num_levels - 1:
inds = torch.nonzero(feat_lvls == lvl + 1).squeeze(-1)
if len(inds) > 0:
boxes = gt_bboxes[inds, :]
proj_boxes = boxes / stride
ig_x1, ig_y1, ig_x2, ig_y2 = self.prop_box_bounds(
proj_boxes, cfg.ignore_scale, w, h)
for i in range(len(inds)):
label_weights[lvl][ig_y1[i]:ig_y2[i], ig_x1[i]:
ig_x2[i]] = 0.
# compute number of foreground and background points
num_pos = 0
num_neg = 0
for lvl in range(num_levels):
npos = bbox_targets[lvl].size(0)
num_pos += npos
num_neg += (label_weights[lvl].nonzero().size(0) - npos)
return (labels, label_weights, bbox_targets, bbox_locs, num_pos,
num_neg)
def feat_level_select(self, cls_score_list, bbox_pred_list, gt_bboxes,
gt_labels, cfg):
if cfg.online_select:
num_levels = len(cls_score_list)
num_boxes = gt_bboxes.size(0)
feat_losses = gt_bboxes.new_zeros((num_boxes, num_levels))
device = bbox_pred_list[0].device
for lvl in range(num_levels):
stride = self.feat_strides[lvl]
norm = stride * self.norm_factor
cls_score = cls_score_list[lvl].permute(1, 2, 0) # h x w x C
bbox_pred = bbox_pred_list[lvl].permute(1, 2, 0) # h x w x 4
h, w = cls_score.size()[:2]
proj_boxes = gt_bboxes / stride
x1, y1, x2, y2 = self.prop_box_bounds(proj_boxes,
cfg.pos_scale, w, h)
for i in range(num_boxes):
locs_x = torch.arange(
x1[i], x2[i], device=device, dtype=torch.long)
locs_y = torch.arange(
y1[i], y2[i], device=device, dtype=torch.long)
locs_xx, locs_yy = self._meshgrid(locs_x, locs_y)
avg_factor = locs_xx.size(0)
# classification focal loss
scores = cls_score[locs_yy, locs_xx, :]
labels = gt_labels[i].repeat(avg_factor)
label_weights = torch.ones_like(labels).float()
loss_cls = sigmoid_focal_loss(
scores,
labels,
weight=label_weights,
gamma=cfg.gamma,
alpha=cfg.alpha,
avg_factor=avg_factor)
# localization iou loss
deltas = bbox_pred[locs_yy, locs_xx, :]
shift_x = (locs_x.float() + 0.5) * stride
shift_y = (locs_y.float() + 0.5) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shifts = torch.stack(
(shift_xx, shift_yy, shift_xx, shift_yy), dim=-1)
shifts[:, 0] = shifts[:, 0] - gt_bboxes[i, 0]
shifts[:, 1] = shifts[:, 1] - gt_bboxes[i, 1]
shifts[:, 2] = gt_bboxes[i, 2] - shifts[:, 2]
shifts[:, 3] = gt_bboxes[i, 3] - shifts[:, 3]
loss_loc = select_iou_loss(deltas, shifts / norm,
cfg.bbox_reg_weight, avg_factor)
feat_losses[i, lvl] = loss_cls + loss_loc
feat_levels = torch.argmin(feat_losses, dim=1)
else:
num_levels = len(self.feat_strides)
lvl0 = cfg.canonical_level
s0 = cfg.canonical_scale
assert 0 <= lvl0 < num_levels
gt_w = gt_bboxes[:, 2] - gt_bboxes[:, 0]
gt_h = gt_bboxes[:, 3] - gt_bboxes[:, 1]
s = torch.sqrt(gt_w * gt_h)
# FPN Eq. (1)
feat_levels = torch.floor(lvl0 + torch.log2(s / s0 + 1e-6))
feat_levels = torch.clamp(feat_levels, 0, num_levels - 1).int()
return feat_levels
def xyxy2xcycwh(self, xyxy):
"""Convert [x1 y1 x2 y2] box format to [xc yc w h] format."""
return torch.cat(
(0.5 * (xyxy[:, 0:2] + xyxy[:, 2:4]), xyxy[:, 2:4] - xyxy[:, 0:2]),
dim=1)
def xcycwh2xyxy(self, xywh):
"""Convert [xc yc w y] box format to [x1 y1 x2 y2] format."""
return torch.cat((xywh[:, 0:2] - 0.5 * xywh[:, 2:4],
xywh[:, 0:2] + 0.5 * xywh[:, 2:4]),
dim=1)
def prop_box_bounds(self, boxes, scale, width, height):
"""Compute proportional box regions.
Box centers are fixed. Box w and h scaled by scale.
"""
prop_boxes = self.xyxy2xcycwh(boxes)
prop_boxes[:, 2:] *= scale
prop_boxes = self.xcycwh2xyxy(prop_boxes)
x1 = torch.floor(prop_boxes[:, 0]).clamp(0, width - 1).int()
y1 = torch.floor(prop_boxes[:, 1]).clamp(0, height - 1).int()
x2 = torch.ceil(prop_boxes[:, 2]).clamp(1, width).int()
y2 = torch.ceil(prop_boxes[:, 3]).clamp(1, height).int()
return x1, y1, x2, y2
def images_to_levels(self, target, num_imgs, num_levels, is_cls=True):
level_target = []
if is_cls:
for lvl in range(num_levels):
level_target.append(
torch.stack([target[i][lvl] for i in range(num_imgs)],
dim=0))
else:
for lvl in range(num_levels):
level_target.append(
torch.cat([target[j][lvl] for j in range(num_imgs)],
dim=0))
return level_target
def get_bboxes(self, cls_scores, bbox_preds, img_metas, cfg,
rescale=False):
num_levels = len(self.feat_strides)
assert len(cls_scores) == len(bbox_preds) == num_levels
device = bbox_preds[0].device
dtype = bbox_preds[0].dtype
mlvl_points = [
self.generate_points(
bbox_preds[i].size()[-2:],
self.feat_strides[i],
device=device,
dtype=dtype) for i in range(num_levels)
]
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() * self.feat_strides[i] *
self.norm_factor for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
mlvl_points, img_shape,
scale_factor, cfg, rescale)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_scores,
bbox_preds,
mlvl_points,
img_shape,
scale_factor,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds) == len(mlvl_points)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, points in zip(cls_scores, bbox_preds,
mlvl_points):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(1, 2,
0).reshape(-1, self.cls_out_channels)
scores = cls_score.sigmoid()
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
max_scores, _ = scores.max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
points = points[topk_inds, :]
bboxes = distance2bbox(points, bbox_pred, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
det_bboxes, det_labels = multiclass_nms(mlvl_bboxes, mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
def generate_points(self,
featmap_size,
stride=16,
device='cuda',
dtype=torch.float32):
feat_h, feat_w = featmap_size
shift_x = torch.arange(0, feat_w, device=device, dtype=dtype) + 0.5
shift_y = torch.arange(0, feat_h, device=device, dtype=dtype) + 0.5
shift_x *= stride
shift_y *= stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
points = torch.stack((shift_xx, shift_yy), dim=-1)
return points
def _meshgrid(self, x, y):
xx = x.repeat(len(y))
yy = y.view(-1, 1).repeat(1, len(x)).view(-1)
return xx, yy
| 23,125
| 42.226168
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/rpn_head.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import normal_init
from mmdet.core import delta2bbox
from mmdet.ops import nms
from ..registry import HEADS
from .anchor_head import AnchorHead
@HEADS.register_module
class RPNHead(AnchorHead):
def __init__(self, in_channels, **kwargs):
super(RPNHead, self).__init__(2, in_channels, **kwargs)
def _init_layers(self):
self.rpn_conv = nn.Conv2d(
self.in_channels, self.feat_channels, 3, padding=1)
self.rpn_cls = nn.Conv2d(self.feat_channels,
self.num_anchors * self.cls_out_channels, 1)
self.rpn_reg = nn.Conv2d(self.feat_channels, self.num_anchors * 4, 1)
def init_weights(self):
normal_init(self.rpn_conv, std=0.01)
normal_init(self.rpn_cls, std=0.01)
normal_init(self.rpn_reg, std=0.01)
def forward_single(self, x):
x = self.rpn_conv(x)
x = F.relu(x, inplace=True)
rpn_cls_score = self.rpn_cls(x)
rpn_bbox_pred = self.rpn_reg(x)
return rpn_cls_score, rpn_bbox_pred
def loss(self,
cls_scores,
bbox_preds,
gt_bboxes,
img_metas,
cfg,
gt_bboxes_ignore=None):
losses = super(RPNHead, self).loss(
cls_scores,
bbox_preds,
gt_bboxes,
None,
img_metas,
cfg,
gt_bboxes_ignore=gt_bboxes_ignore)
return dict(
loss_rpn_cls=losses['loss_cls'], loss_rpn_bbox=losses['loss_bbox'])
def get_bboxes_single(self,
cls_scores,
bbox_preds,
mlvl_anchors,
img_shape,
scale_factor,
cfg,
rescale=False):
mlvl_proposals = []
for idx in range(len(cls_scores)):
rpn_cls_score = cls_scores[idx]
rpn_bbox_pred = bbox_preds[idx]
assert rpn_cls_score.size()[-2:] == rpn_bbox_pred.size()[-2:]
anchors = mlvl_anchors[idx]
rpn_cls_score = rpn_cls_score.permute(1, 2, 0)
if self.use_sigmoid_cls:
rpn_cls_score = rpn_cls_score.reshape(-1)
scores = rpn_cls_score.sigmoid()
else:
rpn_cls_score = rpn_cls_score.reshape(-1, 2)
scores = rpn_cls_score.softmax(dim=1)[:, 1]
rpn_bbox_pred = rpn_bbox_pred.permute(1, 2, 0).reshape(-1, 4)
if cfg.nms_pre > 0 and scores.shape[0] > cfg.nms_pre:
_, topk_inds = scores.topk(cfg.nms_pre)
rpn_bbox_pred = rpn_bbox_pred[topk_inds, :]
anchors = anchors[topk_inds, :]
scores = scores[topk_inds]
proposals = delta2bbox(anchors, rpn_bbox_pred, self.target_means,
self.target_stds, img_shape)
if cfg.min_bbox_size > 0:
w = proposals[:, 2] - proposals[:, 0] + 1
h = proposals[:, 3] - proposals[:, 1] + 1
valid_inds = torch.nonzero((w >= cfg.min_bbox_size) &
(h >= cfg.min_bbox_size)).squeeze()
proposals = proposals[valid_inds, :]
scores = scores[valid_inds]
proposals = torch.cat([proposals, scores.unsqueeze(-1)], dim=-1)
proposals, _ = nms(proposals, cfg.nms_thr)
proposals = proposals[:cfg.nms_post, :]
mlvl_proposals.append(proposals)
proposals = torch.cat(mlvl_proposals, 0)
if cfg.nms_across_levels:
proposals, _ = nms(proposals, cfg.nms_thr)
proposals = proposals[:cfg.max_num, :]
else:
scores = proposals[:, 4]
num = min(cfg.max_num, proposals.shape[0])
_, topk_inds = scores.topk(num)
proposals = proposals[topk_inds, :]
return proposals
| 4,050
| 37.580952
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/anchor_head.py
|
from __future__ import division
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import (AnchorGenerator, anchor_target, delta2bbox, force_fp32,
multi_apply, multiclass_nms)
from ..builder import build_loss
from ..registry import HEADS
@HEADS.register_module
class AnchorHead(nn.Module):
"""Anchor-based head (RPN, RetinaNet, SSD, etc.).
Args:
num_classes (int): Number of categories including the background
category.
in_channels (int): Number of channels in the input feature map.
feat_channels (int): Number of hidden channels. Used in child classes.
anchor_scales (Iterable): Anchor scales.
anchor_ratios (Iterable): Anchor aspect ratios.
anchor_strides (Iterable): Anchor strides.
anchor_base_sizes (Iterable): Anchor base sizes.
target_means (Iterable): Mean values of regression targets.
target_stds (Iterable): Std values of regression targets.
loss_cls (dict): Config of classification loss.
loss_bbox (dict): Config of localization loss.
""" # noqa: W605
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
anchor_scales=[8, 16, 32],
anchor_ratios=[0.5, 1.0, 2.0],
anchor_strides=[4, 8, 16, 32, 64],
anchor_base_sizes=None,
target_means=(.0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0),
loss_cls=dict(
type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_bbox=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.0)):
super(AnchorHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.anchor_scales = anchor_scales
self.anchor_ratios = anchor_ratios
self.anchor_strides = anchor_strides
self.anchor_base_sizes = list(
anchor_strides) if anchor_base_sizes is None else anchor_base_sizes
self.target_means = target_means
self.target_stds = target_stds
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.sampling = loss_cls['type'] not in ['FocalLoss', 'GHMC']
if self.use_sigmoid_cls:
self.cls_out_channels = num_classes - 1
else:
self.cls_out_channels = num_classes
if self.cls_out_channels <= 0:
raise ValueError('num_classes={} is too small'.format(num_classes))
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.fp16_enabled = False
self.anchor_generators = []
for anchor_base in self.anchor_base_sizes:
self.anchor_generators.append(
AnchorGenerator(anchor_base, anchor_scales, anchor_ratios))
self.num_anchors = len(self.anchor_ratios) * len(self.anchor_scales)
self._init_layers()
def _init_layers(self):
self.conv_cls = nn.Conv2d(self.in_channels,
self.num_anchors * self.cls_out_channels, 1)
self.conv_reg = nn.Conv2d(self.in_channels, self.num_anchors * 4, 1)
def init_weights(self):
normal_init(self.conv_cls, std=0.01)
normal_init(self.conv_reg, std=0.01)
def forward_single(self, x):
cls_score = self.conv_cls(x)
bbox_pred = self.conv_reg(x)
return cls_score, bbox_pred
def forward(self, feats):
return multi_apply(self.forward_single, feats)
def get_anchors(self, featmap_sizes, img_metas, device='cuda'):
"""Get anchors according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
img_metas (list[dict]): Image meta info.
device (torch.device | str): device for returned tensors
Returns:
tuple: anchors of each image, valid flags of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# anchors for one time
multi_level_anchors = []
for i in range(num_levels):
anchors = self.anchor_generators[i].grid_anchors(
featmap_sizes[i], self.anchor_strides[i], device=device)
multi_level_anchors.append(anchors)
anchor_list = [multi_level_anchors for _ in range(num_imgs)]
# for each image, we compute valid flags of multi level anchors
valid_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.anchor_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return anchor_list, valid_flag_list
def loss_single(self, cls_score, bbox_pred, labels, label_weights,
bbox_targets, bbox_weights, num_total_samples, cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
cls_score = cls_score.permute(0, 2, 3,
1).reshape(-1, self.cls_out_channels)
loss_cls = self.loss_cls(
cls_score, labels, label_weights, avg_factor=num_total_samples)
# regression loss
bbox_targets = bbox_targets.reshape(-1, 4)
bbox_weights = bbox_weights.reshape(-1, 4)
bbox_pred = bbox_pred.permute(0, 2, 3, 1).reshape(-1, 4)
loss_bbox = self.loss_bbox(
bbox_pred,
bbox_targets,
bbox_weights,
avg_factor=num_total_samples)
return loss_cls, loss_bbox
@force_fp32(apply_to=('cls_scores', 'bbox_preds'))
def loss(self,
cls_scores,
bbox_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.anchor_generators)
device = cls_scores[0].device
anchor_list, valid_flag_list = self.get_anchors(
featmap_sizes, img_metas, device=device)
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
anchor_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos + num_total_neg if self.sampling else num_total_pos)
losses_cls, losses_bbox = multi_apply(
self.loss_single,
cls_scores,
bbox_preds,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg)
return dict(loss_cls=losses_cls, loss_bbox=losses_bbox)
@force_fp32(apply_to=('cls_scores', 'bbox_preds'))
def get_bboxes(self, cls_scores, bbox_preds, img_metas, cfg,
rescale=False):
"""
Transform network output for a batch into labeled boxes.
Args:
cls_scores (list[Tensor]): Box scores for each scale level
Has shape (N, num_anchors * num_classes, H, W)
bbox_preds (list[Tensor]): Box energies / deltas for each scale
level with shape (N, num_anchors * 4, H, W)
img_metas (list[dict]): size / scale info for each image
cfg (mmcv.Config): test / postprocessing configuration
rescale (bool): if True, return boxes in original image space
Returns:
list[tuple[Tensor, Tensor]]: each item in result_list is 2-tuple.
The first item is an (n, 5) tensor, where the first 4 columns
are bounding box positions (tl_x, tl_y, br_x, br_y) and the
5-th column is a score between 0 and 1. The second item is a
(n,) tensor where each item is the class index of the
corresponding box.
Example:
>>> import mmcv
>>> self = AnchorHead(num_classes=9, in_channels=1)
>>> img_metas = [{'img_shape': (32, 32, 3), 'scale_factor': 1}]
>>> cfg = mmcv.Config(dict(
>>> score_thr=0.00,
>>> nms=dict(type='nms', iou_thr=1.0),
>>> max_per_img=10))
>>> feat = torch.rand(1, 1, 3, 3)
>>> cls_score, bbox_pred = self.forward_single(feat)
>>> # note the input lists are over different levels, not images
>>> cls_scores, bbox_preds = [cls_score], [bbox_pred]
>>> result_list = self.get_bboxes(cls_scores, bbox_preds,
>>> img_metas, cfg)
>>> det_bboxes, det_labels = result_list[0]
>>> assert len(result_list) == 1
>>> assert det_bboxes.shape[1] == 5
>>> assert len(det_bboxes) == len(det_labels) == cfg.max_per_img
"""
assert len(cls_scores) == len(bbox_preds)
num_levels = len(cls_scores)
device = cls_scores[0].device
mlvl_anchors = [
self.anchor_generators[i].grid_anchors(
cls_scores[i].size()[-2:],
self.anchor_strides[i],
device=device) for i in range(num_levels)
]
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
mlvl_anchors, img_shape,
scale_factor, cfg, rescale)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_score_list,
bbox_pred_list,
mlvl_anchors,
img_shape,
scale_factor,
cfg,
rescale=False):
"""
Transform outputs for a single batch item into labeled boxes.
"""
assert len(cls_score_list) == len(bbox_pred_list) == len(mlvl_anchors)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, anchors in zip(cls_score_list,
bbox_pred_list, mlvl_anchors):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(1, 2,
0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
# Get maximum scores for foreground classes.
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
anchors = anchors[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bboxes = delta2bbox(anchors, bbox_pred, self.target_means,
self.target_stds, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
# Add a dummy background class to the front when using sigmoid
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
det_bboxes, det_labels = multiclass_nms(mlvl_bboxes, mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
| 13,818
| 41.259939
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/retina_head.py
|
import numpy as np
import torch.nn as nn
from mmcv.cnn import normal_init
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
from .anchor_head import AnchorHead
@HEADS.register_module
class RetinaHead(AnchorHead):
"""
An anchor-based head used in [1]_.
The head contains two subnetworks. The first classifies anchor boxes and
the second regresses deltas for the anchors.
References:
.. [1] https://arxiv.org/pdf/1708.02002.pdf
Example:
>>> import torch
>>> self = RetinaHead(11, 7)
>>> x = torch.rand(1, 7, 32, 32)
>>> cls_score, bbox_pred = self.forward_single(x)
>>> # Each anchor predicts a score for each class except background
>>> cls_per_anchor = cls_score.shape[1] / self.num_anchors
>>> box_per_anchor = bbox_pred.shape[1] / self.num_anchors
>>> assert cls_per_anchor == (self.num_classes - 1)
>>> assert box_per_anchor == 4
"""
def __init__(self,
num_classes,
in_channels,
stacked_convs=4,
octave_base_scale=4,
scales_per_octave=3,
conv_cfg=None,
norm_cfg=None,
**kwargs):
self.stacked_convs = stacked_convs
self.octave_base_scale = octave_base_scale
self.scales_per_octave = scales_per_octave
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
octave_scales = np.array(
[2**(i / scales_per_octave) for i in range(scales_per_octave)])
anchor_scales = octave_scales * octave_base_scale
super(RetinaHead, self).__init__(
num_classes, in_channels, anchor_scales=anchor_scales, **kwargs)
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.retina_cls = nn.Conv2d(
self.feat_channels,
self.num_anchors * self.cls_out_channels,
3,
padding=1)
self.retina_reg = nn.Conv2d(
self.feat_channels, self.num_anchors * 4, 3, padding=1)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.retina_cls, std=0.01, bias=bias_cls)
normal_init(self.retina_reg, std=0.01)
def forward_single(self, x):
cls_feat = x
reg_feat = x
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
for reg_conv in self.reg_convs:
reg_feat = reg_conv(reg_feat)
cls_score = self.retina_cls(cls_feat)
bbox_pred = self.retina_reg(reg_feat)
return cls_score, bbox_pred
| 3,602
| 33.644231
| 76
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/ga_rpn_head.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import normal_init
from mmdet.core import delta2bbox
from mmdet.ops import nms
from ..registry import HEADS
from .guided_anchor_head import GuidedAnchorHead
@HEADS.register_module
class GARPNHead(GuidedAnchorHead):
"""Guided-Anchor-based RPN head."""
def __init__(self, in_channels, **kwargs):
super(GARPNHead, self).__init__(2, in_channels, **kwargs)
def _init_layers(self):
self.rpn_conv = nn.Conv2d(
self.in_channels, self.feat_channels, 3, padding=1)
super(GARPNHead, self)._init_layers()
def init_weights(self):
normal_init(self.rpn_conv, std=0.01)
super(GARPNHead, self).init_weights()
def forward_single(self, x):
x = self.rpn_conv(x)
x = F.relu(x, inplace=True)
(cls_score, bbox_pred, shape_pred,
loc_pred) = super(GARPNHead, self).forward_single(x)
return cls_score, bbox_pred, shape_pred, loc_pred
def loss(self,
cls_scores,
bbox_preds,
shape_preds,
loc_preds,
gt_bboxes,
img_metas,
cfg,
gt_bboxes_ignore=None):
losses = super(GARPNHead, self).loss(
cls_scores,
bbox_preds,
shape_preds,
loc_preds,
gt_bboxes,
None,
img_metas,
cfg,
gt_bboxes_ignore=gt_bboxes_ignore)
return dict(
loss_rpn_cls=losses['loss_cls'],
loss_rpn_bbox=losses['loss_bbox'],
loss_anchor_shape=losses['loss_shape'],
loss_anchor_loc=losses['loss_loc'])
def get_bboxes_single(self,
cls_scores,
bbox_preds,
mlvl_anchors,
mlvl_masks,
img_shape,
scale_factor,
cfg,
rescale=False):
mlvl_proposals = []
for idx in range(len(cls_scores)):
rpn_cls_score = cls_scores[idx]
rpn_bbox_pred = bbox_preds[idx]
anchors = mlvl_anchors[idx]
mask = mlvl_masks[idx]
assert rpn_cls_score.size()[-2:] == rpn_bbox_pred.size()[-2:]
# if no location is kept, end.
if mask.sum() == 0:
continue
rpn_cls_score = rpn_cls_score.permute(1, 2, 0)
if self.use_sigmoid_cls:
rpn_cls_score = rpn_cls_score.reshape(-1)
scores = rpn_cls_score.sigmoid()
else:
rpn_cls_score = rpn_cls_score.reshape(-1, 2)
scores = rpn_cls_score.softmax(dim=1)[:, 1]
# filter scores, bbox_pred w.r.t. mask.
# anchors are filtered in get_anchors() beforehand.
scores = scores[mask]
rpn_bbox_pred = rpn_bbox_pred.permute(1, 2, 0).reshape(-1,
4)[mask, :]
if scores.dim() == 0:
rpn_bbox_pred = rpn_bbox_pred.unsqueeze(0)
anchors = anchors.unsqueeze(0)
scores = scores.unsqueeze(0)
# filter anchors, bbox_pred, scores w.r.t. scores
if cfg.nms_pre > 0 and scores.shape[0] > cfg.nms_pre:
_, topk_inds = scores.topk(cfg.nms_pre)
rpn_bbox_pred = rpn_bbox_pred[topk_inds, :]
anchors = anchors[topk_inds, :]
scores = scores[topk_inds]
# get proposals w.r.t. anchors and rpn_bbox_pred
proposals = delta2bbox(anchors, rpn_bbox_pred, self.target_means,
self.target_stds, img_shape)
# filter out too small bboxes
if cfg.min_bbox_size > 0:
w = proposals[:, 2] - proposals[:, 0] + 1
h = proposals[:, 3] - proposals[:, 1] + 1
valid_inds = torch.nonzero((w >= cfg.min_bbox_size) &
(h >= cfg.min_bbox_size)).squeeze()
proposals = proposals[valid_inds, :]
scores = scores[valid_inds]
proposals = torch.cat([proposals, scores.unsqueeze(-1)], dim=-1)
# NMS in current level
proposals, _ = nms(proposals, cfg.nms_thr)
proposals = proposals[:cfg.nms_post, :]
mlvl_proposals.append(proposals)
proposals = torch.cat(mlvl_proposals, 0)
if cfg.nms_across_levels:
# NMS across multi levels
proposals, _ = nms(proposals, cfg.nms_thr)
proposals = proposals[:cfg.max_num, :]
else:
scores = proposals[:, 4]
num = min(cfg.max_num, proposals.shape[0])
_, topk_inds = scores.topk(num)
proposals = proposals[topk_inds, :]
return proposals
| 4,981
| 37.921875
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/ga_retina_head.py
|
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.ops import MaskedConv2d
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
from .guided_anchor_head import FeatureAdaption, GuidedAnchorHead
@HEADS.register_module
class GARetinaHead(GuidedAnchorHead):
"""Guided-Anchor-based RetinaNet head."""
def __init__(self,
num_classes,
in_channels,
stacked_convs=4,
conv_cfg=None,
norm_cfg=None,
**kwargs):
self.stacked_convs = stacked_convs
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
super(GARetinaHead, self).__init__(num_classes, in_channels, **kwargs)
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.conv_loc = nn.Conv2d(self.feat_channels, 1, 1)
self.conv_shape = nn.Conv2d(self.feat_channels, self.num_anchors * 2,
1)
self.feature_adaption_cls = FeatureAdaption(
self.feat_channels,
self.feat_channels,
kernel_size=3,
deformable_groups=self.deformable_groups)
self.feature_adaption_reg = FeatureAdaption(
self.feat_channels,
self.feat_channels,
kernel_size=3,
deformable_groups=self.deformable_groups)
self.retina_cls = MaskedConv2d(
self.feat_channels,
self.num_anchors * self.cls_out_channels,
3,
padding=1)
self.retina_reg = MaskedConv2d(
self.feat_channels, self.num_anchors * 4, 3, padding=1)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
self.feature_adaption_cls.init_weights()
self.feature_adaption_reg.init_weights()
bias_cls = bias_init_with_prob(0.01)
normal_init(self.conv_loc, std=0.01, bias=bias_cls)
normal_init(self.conv_shape, std=0.01)
normal_init(self.retina_cls, std=0.01, bias=bias_cls)
normal_init(self.retina_reg, std=0.01)
def forward_single(self, x):
cls_feat = x
reg_feat = x
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
for reg_conv in self.reg_convs:
reg_feat = reg_conv(reg_feat)
loc_pred = self.conv_loc(cls_feat)
shape_pred = self.conv_shape(reg_feat)
cls_feat = self.feature_adaption_cls(cls_feat, shape_pred)
reg_feat = self.feature_adaption_reg(reg_feat, shape_pred)
if not self.training:
mask = loc_pred.sigmoid()[0] >= self.loc_filter_thr
else:
mask = None
cls_score = self.retina_cls(cls_feat, mask)
bbox_pred = self.retina_reg(reg_feat, mask)
return cls_score, bbox_pred, shape_pred, loc_pred
| 3,760
| 33.824074
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/ssd_head.py
|
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import xavier_init
from mmdet.core import AnchorGenerator, anchor_target, multi_apply
from ..losses import smooth_l1_loss
from ..registry import HEADS
from .anchor_head import AnchorHead
# TODO: add loss evaluator for SSD
@HEADS.register_module
class SSDHead(AnchorHead):
def __init__(self,
input_size=300,
num_classes=81,
in_channels=(512, 1024, 512, 256, 256, 256),
anchor_strides=(8, 16, 32, 64, 100, 300),
basesize_ratio_range=(0.1, 0.9),
anchor_ratios=([2], [2, 3], [2, 3], [2, 3], [2], [2]),
target_means=(.0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0)):
super(AnchorHead, self).__init__()
self.input_size = input_size
self.num_classes = num_classes
self.in_channels = in_channels
self.cls_out_channels = num_classes
num_anchors = [len(ratios) * 2 + 2 for ratios in anchor_ratios]
reg_convs = []
cls_convs = []
for i in range(len(in_channels)):
reg_convs.append(
nn.Conv2d(
in_channels[i],
num_anchors[i] * 4,
kernel_size=3,
padding=1))
cls_convs.append(
nn.Conv2d(
in_channels[i],
num_anchors[i] * num_classes,
kernel_size=3,
padding=1))
self.reg_convs = nn.ModuleList(reg_convs)
self.cls_convs = nn.ModuleList(cls_convs)
min_ratio, max_ratio = basesize_ratio_range
min_ratio = int(min_ratio * 100)
max_ratio = int(max_ratio * 100)
step = int(np.floor(max_ratio - min_ratio) / (len(in_channels) - 2))
min_sizes = []
max_sizes = []
for r in range(int(min_ratio), int(max_ratio) + 1, step):
min_sizes.append(int(input_size * r / 100))
max_sizes.append(int(input_size * (r + step) / 100))
if input_size == 300:
if basesize_ratio_range[0] == 0.15: # SSD300 COCO
min_sizes.insert(0, int(input_size * 7 / 100))
max_sizes.insert(0, int(input_size * 15 / 100))
elif basesize_ratio_range[0] == 0.2: # SSD300 VOC
min_sizes.insert(0, int(input_size * 10 / 100))
max_sizes.insert(0, int(input_size * 20 / 100))
elif input_size == 512:
if basesize_ratio_range[0] == 0.1: # SSD512 COCO
min_sizes.insert(0, int(input_size * 4 / 100))
max_sizes.insert(0, int(input_size * 10 / 100))
elif basesize_ratio_range[0] == 0.15: # SSD512 VOC
min_sizes.insert(0, int(input_size * 7 / 100))
max_sizes.insert(0, int(input_size * 15 / 100))
self.anchor_generators = []
self.anchor_strides = anchor_strides
for k in range(len(anchor_strides)):
base_size = min_sizes[k]
stride = anchor_strides[k]
ctr = ((stride - 1) / 2., (stride - 1) / 2.)
scales = [1., np.sqrt(max_sizes[k] / min_sizes[k])]
ratios = [1.]
for r in anchor_ratios[k]:
ratios += [1 / r, r] # 4 or 6 ratio
anchor_generator = AnchorGenerator(
base_size, scales, ratios, scale_major=False, ctr=ctr)
indices = list(range(len(ratios)))
indices.insert(1, len(indices))
anchor_generator.base_anchors = torch.index_select(
anchor_generator.base_anchors, 0, torch.LongTensor(indices))
self.anchor_generators.append(anchor_generator)
self.target_means = target_means
self.target_stds = target_stds
self.use_sigmoid_cls = False
self.cls_focal_loss = False
self.fp16_enabled = False
def init_weights(self):
for m in self.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform', bias=0)
def forward(self, feats):
cls_scores = []
bbox_preds = []
for feat, reg_conv, cls_conv in zip(feats, self.reg_convs,
self.cls_convs):
cls_scores.append(cls_conv(feat))
bbox_preds.append(reg_conv(feat))
return cls_scores, bbox_preds
def loss_single(self, cls_score, bbox_pred, labels, label_weights,
bbox_targets, bbox_weights, num_total_samples, cfg):
loss_cls_all = F.cross_entropy(
cls_score, labels, reduction='none') * label_weights
pos_inds = (labels > 0).nonzero().view(-1)
neg_inds = (labels == 0).nonzero().view(-1)
num_pos_samples = pos_inds.size(0)
num_neg_samples = cfg.neg_pos_ratio * num_pos_samples
if num_neg_samples > neg_inds.size(0):
num_neg_samples = neg_inds.size(0)
topk_loss_cls_neg, _ = loss_cls_all[neg_inds].topk(num_neg_samples)
loss_cls_pos = loss_cls_all[pos_inds].sum()
loss_cls_neg = topk_loss_cls_neg.sum()
loss_cls = (loss_cls_pos + loss_cls_neg) / num_total_samples
loss_bbox = smooth_l1_loss(
bbox_pred,
bbox_targets,
bbox_weights,
beta=cfg.smoothl1_beta,
avg_factor=num_total_samples)
return loss_cls[None], loss_bbox
def loss(self,
cls_scores,
bbox_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.anchor_generators)
device = cls_scores[0].device
anchor_list, valid_flag_list = self.get_anchors(
featmap_sizes, img_metas, device=device)
cls_reg_targets = anchor_target(
anchor_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=1,
sampling=False,
unmap_outputs=False)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_images = len(img_metas)
all_cls_scores = torch.cat([
s.permute(0, 2, 3, 1).reshape(
num_images, -1, self.cls_out_channels) for s in cls_scores
], 1)
all_labels = torch.cat(labels_list, -1).view(num_images, -1)
all_label_weights = torch.cat(label_weights_list,
-1).view(num_images, -1)
all_bbox_preds = torch.cat([
b.permute(0, 2, 3, 1).reshape(num_images, -1, 4)
for b in bbox_preds
], -2)
all_bbox_targets = torch.cat(bbox_targets_list,
-2).view(num_images, -1, 4)
all_bbox_weights = torch.cat(bbox_weights_list,
-2).view(num_images, -1, 4)
losses_cls, losses_bbox = multi_apply(
self.loss_single,
all_cls_scores,
all_bbox_preds,
all_labels,
all_label_weights,
all_bbox_targets,
all_bbox_weights,
num_total_samples=num_total_pos,
cfg=cfg)
return dict(loss_cls=losses_cls, loss_bbox=losses_bbox)
| 7,762
| 38.607143
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/fcos_head.py
|
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import distance2bbox, force_fp32, multi_apply, multiclass_nms
from ..builder import build_loss
from ..registry import HEADS
from ..utils import ConvModule, Scale, bias_init_with_prob
INF = 1e8
@HEADS.register_module
class FCOSHead(nn.Module):
"""
Fully Convolutional One-Stage Object Detection head from [1]_.
The FCOS head does not use anchor boxes. Instead bounding boxes are
predicted at each pixel and a centerness measure is used to supress
low-quality predictions.
References:
.. [1] https://arxiv.org/abs/1904.01355
Example:
>>> self = FCOSHead(11, 7)
>>> feats = [torch.rand(1, 7, s, s) for s in [4, 8, 16, 32, 64]]
>>> cls_score, bbox_pred, centerness = self.forward(feats)
>>> assert len(cls_score) == len(self.scales)
"""
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=4,
strides=(4, 8, 16, 32, 64),
regress_ranges=((-1, 64), (64, 128), (128, 256), (256, 512),
(512, INF)),
loss_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_bbox=dict(type='IoULoss', loss_weight=1.0),
loss_centerness=dict(
type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
conv_cfg=None,
norm_cfg=dict(type='GN', num_groups=32, requires_grad=True)):
super(FCOSHead, self).__init__()
self.num_classes = num_classes
self.cls_out_channels = num_classes - 1
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.strides = strides
self.regress_ranges = regress_ranges
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.loss_centerness = build_loss(loss_centerness)
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.fp16_enabled = False
self._init_layers()
def _init_layers(self):
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.fcos_cls = nn.Conv2d(
self.feat_channels, self.cls_out_channels, 3, padding=1)
self.fcos_reg = nn.Conv2d(self.feat_channels, 4, 3, padding=1)
self.fcos_centerness = nn.Conv2d(self.feat_channels, 1, 3, padding=1)
self.scales = nn.ModuleList([Scale(1.0) for _ in self.strides])
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.fcos_cls, std=0.01, bias=bias_cls)
normal_init(self.fcos_reg, std=0.01)
normal_init(self.fcos_centerness, std=0.01)
def forward(self, feats):
return multi_apply(self.forward_single, feats, self.scales)
def forward_single(self, x, scale):
cls_feat = x
reg_feat = x
for cls_layer in self.cls_convs:
cls_feat = cls_layer(cls_feat)
cls_score = self.fcos_cls(cls_feat)
centerness = self.fcos_centerness(cls_feat)
for reg_layer in self.reg_convs:
reg_feat = reg_layer(reg_feat)
# scale the bbox_pred of different level
# float to avoid overflow when enabling FP16
bbox_pred = scale(self.fcos_reg(reg_feat)).float().exp()
return cls_score, bbox_pred, centerness
@force_fp32(apply_to=('cls_scores', 'bbox_preds', 'centernesses'))
def loss(self,
cls_scores,
bbox_preds,
centernesses,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
assert len(cls_scores) == len(bbox_preds) == len(centernesses)
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
all_level_points = self.get_points(featmap_sizes, bbox_preds[0].dtype,
bbox_preds[0].device)
labels, bbox_targets = self.fcos_target(all_level_points, gt_bboxes,
gt_labels)
num_imgs = cls_scores[0].size(0)
# flatten cls_scores, bbox_preds and centerness
flatten_cls_scores = [
cls_score.permute(0, 2, 3, 1).reshape(-1, self.cls_out_channels)
for cls_score in cls_scores
]
flatten_bbox_preds = [
bbox_pred.permute(0, 2, 3, 1).reshape(-1, 4)
for bbox_pred in bbox_preds
]
flatten_centerness = [
centerness.permute(0, 2, 3, 1).reshape(-1)
for centerness in centernesses
]
flatten_cls_scores = torch.cat(flatten_cls_scores)
flatten_bbox_preds = torch.cat(flatten_bbox_preds)
flatten_centerness = torch.cat(flatten_centerness)
flatten_labels = torch.cat(labels)
flatten_bbox_targets = torch.cat(bbox_targets)
# repeat points to align with bbox_preds
flatten_points = torch.cat(
[points.repeat(num_imgs, 1) for points in all_level_points])
pos_inds = flatten_labels.nonzero().reshape(-1)
num_pos = len(pos_inds)
loss_cls = self.loss_cls(
flatten_cls_scores, flatten_labels,
avg_factor=num_pos + num_imgs) # avoid num_pos is 0
pos_bbox_preds = flatten_bbox_preds[pos_inds]
pos_centerness = flatten_centerness[pos_inds]
if num_pos > 0:
pos_bbox_targets = flatten_bbox_targets[pos_inds]
pos_centerness_targets = self.centerness_target(pos_bbox_targets)
pos_points = flatten_points[pos_inds]
pos_decoded_bbox_preds = distance2bbox(pos_points, pos_bbox_preds)
pos_decoded_target_preds = distance2bbox(pos_points,
pos_bbox_targets)
# centerness weighted iou loss
loss_bbox = self.loss_bbox(
pos_decoded_bbox_preds,
pos_decoded_target_preds,
weight=pos_centerness_targets,
avg_factor=pos_centerness_targets.sum())
loss_centerness = self.loss_centerness(pos_centerness,
pos_centerness_targets)
else:
loss_bbox = pos_bbox_preds.sum()
loss_centerness = pos_centerness.sum()
return dict(
loss_cls=loss_cls,
loss_bbox=loss_bbox,
loss_centerness=loss_centerness)
@force_fp32(apply_to=('cls_scores', 'bbox_preds', 'centernesses'))
def get_bboxes(self,
cls_scores,
bbox_preds,
centernesses,
img_metas,
cfg,
rescale=None):
assert len(cls_scores) == len(bbox_preds)
num_levels = len(cls_scores)
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
mlvl_points = self.get_points(featmap_sizes, bbox_preds[0].dtype,
bbox_preds[0].device)
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() for i in range(num_levels)
]
centerness_pred_list = [
centernesses[i][img_id].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
det_bboxes = self.get_bboxes_single(cls_score_list, bbox_pred_list,
centerness_pred_list,
mlvl_points, img_shape,
scale_factor, cfg, rescale)
result_list.append(det_bboxes)
return result_list
def get_bboxes_single(self,
cls_scores,
bbox_preds,
centernesses,
mlvl_points,
img_shape,
scale_factor,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds) == len(mlvl_points)
mlvl_bboxes = []
mlvl_scores = []
mlvl_centerness = []
for cls_score, bbox_pred, centerness, points in zip(
cls_scores, bbox_preds, centernesses, mlvl_points):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
scores = cls_score.permute(1, 2, 0).reshape(
-1, self.cls_out_channels).sigmoid()
centerness = centerness.permute(1, 2, 0).reshape(-1).sigmoid()
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
max_scores, _ = (scores * centerness[:, None]).max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
points = points[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
centerness = centerness[topk_inds]
bboxes = distance2bbox(points, bbox_pred, max_shape=img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_centerness.append(centerness)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
mlvl_centerness = torch.cat(mlvl_centerness)
det_bboxes, det_labels = multiclass_nms(
mlvl_bboxes,
mlvl_scores,
cfg.score_thr,
cfg.nms,
cfg.max_per_img,
score_factors=mlvl_centerness)
return det_bboxes, det_labels
def get_points(self, featmap_sizes, dtype, device):
"""Get points according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
dtype (torch.dtype): Type of points.
device (torch.device): Device of points.
Returns:
tuple: points of each image.
"""
mlvl_points = []
for i in range(len(featmap_sizes)):
mlvl_points.append(
self.get_points_single(featmap_sizes[i], self.strides[i],
dtype, device))
return mlvl_points
def get_points_single(self, featmap_size, stride, dtype, device):
h, w = featmap_size
x_range = torch.arange(
0, w * stride, stride, dtype=dtype, device=device)
y_range = torch.arange(
0, h * stride, stride, dtype=dtype, device=device)
y, x = torch.meshgrid(y_range, x_range)
points = torch.stack(
(x.reshape(-1), y.reshape(-1)), dim=-1) + stride // 2
return points
def fcos_target(self, points, gt_bboxes_list, gt_labels_list):
assert len(points) == len(self.regress_ranges)
num_levels = len(points)
# expand regress ranges to align with points
expanded_regress_ranges = [
points[i].new_tensor(self.regress_ranges[i])[None].expand_as(
points[i]) for i in range(num_levels)
]
# concat all levels points and regress ranges
concat_regress_ranges = torch.cat(expanded_regress_ranges, dim=0)
concat_points = torch.cat(points, dim=0)
# get labels and bbox_targets of each image
labels_list, bbox_targets_list = multi_apply(
self.fcos_target_single,
gt_bboxes_list,
gt_labels_list,
points=concat_points,
regress_ranges=concat_regress_ranges)
# split to per img, per level
num_points = [center.size(0) for center in points]
labels_list = [labels.split(num_points, 0) for labels in labels_list]
bbox_targets_list = [
bbox_targets.split(num_points, 0)
for bbox_targets in bbox_targets_list
]
# concat per level image
concat_lvl_labels = []
concat_lvl_bbox_targets = []
for i in range(num_levels):
concat_lvl_labels.append(
torch.cat([labels[i] for labels in labels_list]))
concat_lvl_bbox_targets.append(
torch.cat(
[bbox_targets[i] for bbox_targets in bbox_targets_list]))
return concat_lvl_labels, concat_lvl_bbox_targets
def fcos_target_single(self, gt_bboxes, gt_labels, points, regress_ranges):
num_points = points.size(0)
num_gts = gt_labels.size(0)
if num_gts == 0:
return gt_labels.new_zeros(num_points), \
gt_bboxes.new_zeros((num_points, 4))
areas = (gt_bboxes[:, 2] - gt_bboxes[:, 0] + 1) * (
gt_bboxes[:, 3] - gt_bboxes[:, 1] + 1)
# TODO: figure out why these two are different
# areas = areas[None].expand(num_points, num_gts)
areas = areas[None].repeat(num_points, 1)
regress_ranges = regress_ranges[:, None, :].expand(
num_points, num_gts, 2)
gt_bboxes = gt_bboxes[None].expand(num_points, num_gts, 4)
xs, ys = points[:, 0], points[:, 1]
xs = xs[:, None].expand(num_points, num_gts)
ys = ys[:, None].expand(num_points, num_gts)
left = xs - gt_bboxes[..., 0]
right = gt_bboxes[..., 2] - xs
top = ys - gt_bboxes[..., 1]
bottom = gt_bboxes[..., 3] - ys
bbox_targets = torch.stack((left, top, right, bottom), -1)
# condition1: inside a gt bbox
inside_gt_bbox_mask = bbox_targets.min(-1)[0] > 0
# condition2: limit the regression range for each location
max_regress_distance = bbox_targets.max(-1)[0]
inside_regress_range = (
max_regress_distance >= regress_ranges[..., 0]) & (
max_regress_distance <= regress_ranges[..., 1])
# if there are still more than one objects for a location,
# we choose the one with minimal area
areas[inside_gt_bbox_mask == 0] = INF
areas[inside_regress_range == 0] = INF
min_area, min_area_inds = areas.min(dim=1)
labels = gt_labels[min_area_inds]
labels[min_area == INF] = 0
bbox_targets = bbox_targets[range(num_points), min_area_inds]
return labels, bbox_targets
def centerness_target(self, pos_bbox_targets):
# only calculate pos centerness targets, otherwise there may be nan
left_right = pos_bbox_targets[:, [0, 2]]
top_bottom = pos_bbox_targets[:, [1, 3]]
centerness_targets = (
left_right.min(dim=-1)[0] / left_right.max(dim=-1)[0]) * (
top_bottom.min(dim=-1)[0] / top_bottom.max(dim=-1)[0])
return torch.sqrt(centerness_targets)
| 16,503
| 39.952854
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/__init__.py
|
from .anchor_head import AnchorHead
from .fcos_head import FCOSHead
from .fovea_head import FoveaHead
from .fsaf_head import FSAFHead
from .ga_retina_head import GARetinaHead
from .ga_rpn_head import GARPNHead
from .guided_anchor_head import FeatureAdaption, GuidedAnchorHead
from .reppoints_head import RepPointsHead
from .retina_head import RetinaHead
from .rpn_head import RPNHead
from .ssd_head import SSDHead
__all__ = [
'AnchorHead', 'GuidedAnchorHead', 'FeatureAdaption', 'RPNHead',
'GARPNHead', 'RetinaHead', 'GARetinaHead', 'SSDHead', 'FCOSHead',
'RepPointsHead', 'FoveaHead', 'FSAFHead'
]
| 612
| 33.055556
| 69
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/guided_anchor_head.py
|
from __future__ import division
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import (AnchorGenerator, anchor_inside_flags, anchor_target,
delta2bbox, force_fp32, ga_loc_target, ga_shape_target,
multi_apply, multiclass_nms)
from mmdet.ops import DeformConv, MaskedConv2d
from ..builder import build_loss
from ..registry import HEADS
from ..utils import bias_init_with_prob
from .anchor_head import AnchorHead
class FeatureAdaption(nn.Module):
"""Feature Adaption Module.
Feature Adaption Module is implemented based on DCN v1.
It uses anchor shape prediction rather than feature map to
predict offsets of deformable conv layer.
Args:
in_channels (int): Number of channels in the input feature map.
out_channels (int): Number of channels in the output feature map.
kernel_size (int): Deformable conv kernel size.
deformable_groups (int): Deformable conv group size.
"""
def __init__(self,
in_channels,
out_channels,
kernel_size=3,
deformable_groups=4):
super(FeatureAdaption, self).__init__()
offset_channels = kernel_size * kernel_size * 2
self.conv_offset = nn.Conv2d(
2, deformable_groups * offset_channels, 1, bias=False)
self.conv_adaption = DeformConv(
in_channels,
out_channels,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
deformable_groups=deformable_groups)
self.relu = nn.ReLU(inplace=True)
def init_weights(self):
normal_init(self.conv_offset, std=0.1)
normal_init(self.conv_adaption, std=0.01)
def forward(self, x, shape):
offset = self.conv_offset(shape.detach())
x = self.relu(self.conv_adaption(x, offset))
return x
@HEADS.register_module
class GuidedAnchorHead(AnchorHead):
"""Guided-Anchor-based head (GA-RPN, GA-RetinaNet, etc.).
This GuidedAnchorHead will predict high-quality feature guided
anchors and locations where anchors will be kept in inference.
There are mainly 3 categories of bounding-boxes.
- Sampled (9) pairs for target assignment. (approxes)
- The square boxes where the predicted anchors are based on.
(squares)
- Guided anchors.
Please refer to https://arxiv.org/abs/1901.03278 for more details.
Args:
num_classes (int): Number of classes.
in_channels (int): Number of channels in the input feature map.
feat_channels (int): Number of hidden channels.
octave_base_scale (int): Base octave scale of each level of
feature map.
scales_per_octave (int): Number of octave scales in each level of
feature map
octave_ratios (Iterable): octave aspect ratios.
anchor_strides (Iterable): Anchor strides.
anchor_base_sizes (Iterable): Anchor base sizes.
anchoring_means (Iterable): Mean values of anchoring targets.
anchoring_stds (Iterable): Std values of anchoring targets.
target_means (Iterable): Mean values of regression targets.
target_stds (Iterable): Std values of regression targets.
deformable_groups: (int): Group number of DCN in
FeatureAdaption module.
loc_filter_thr (float): Threshold to filter out unconcerned regions.
loss_loc (dict): Config of location loss.
loss_shape (dict): Config of anchor shape loss.
loss_cls (dict): Config of classification loss.
loss_bbox (dict): Config of bbox regression loss.
"""
def __init__(
self,
num_classes,
in_channels,
feat_channels=256,
octave_base_scale=8,
scales_per_octave=3,
octave_ratios=[0.5, 1.0, 2.0],
anchor_strides=[4, 8, 16, 32, 64],
anchor_base_sizes=None,
anchoring_means=(.0, .0, .0, .0),
anchoring_stds=(1.0, 1.0, 1.0, 1.0),
target_means=(.0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0),
deformable_groups=4,
loc_filter_thr=0.01,
loss_loc=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_shape=dict(type='BoundedIoULoss', beta=0.2, loss_weight=1.0),
loss_cls=dict(
type='CrossEntropyLoss', use_sigmoid=True, loss_weight=1.0),
loss_bbox=dict(type='SmoothL1Loss', beta=1.0, loss_weight=1.0)):
super(AnchorHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.octave_base_scale = octave_base_scale
self.scales_per_octave = scales_per_octave
self.octave_scales = octave_base_scale * np.array(
[2**(i / scales_per_octave) for i in range(scales_per_octave)])
self.approxs_per_octave = len(self.octave_scales) * len(octave_ratios)
self.octave_ratios = octave_ratios
self.anchor_strides = anchor_strides
self.anchor_base_sizes = list(
anchor_strides) if anchor_base_sizes is None else anchor_base_sizes
self.anchoring_means = anchoring_means
self.anchoring_stds = anchoring_stds
self.target_means = target_means
self.target_stds = target_stds
self.deformable_groups = deformable_groups
self.loc_filter_thr = loc_filter_thr
self.approx_generators = []
self.square_generators = []
for anchor_base in self.anchor_base_sizes:
# Generators for approxs
self.approx_generators.append(
AnchorGenerator(anchor_base, self.octave_scales,
self.octave_ratios))
# Generators for squares
self.square_generators.append(
AnchorGenerator(anchor_base, [self.octave_base_scale], [1.0]))
# one anchor per location
self.num_anchors = 1
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.cls_focal_loss = loss_cls['type'] in ['FocalLoss']
self.loc_focal_loss = loss_loc['type'] in ['FocalLoss']
if self.use_sigmoid_cls:
self.cls_out_channels = self.num_classes - 1
else:
self.cls_out_channels = self.num_classes
# build losses
self.loss_loc = build_loss(loss_loc)
self.loss_shape = build_loss(loss_shape)
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.fp16_enabled = False
self._init_layers()
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.conv_loc = nn.Conv2d(self.in_channels, 1, 1)
self.conv_shape = nn.Conv2d(self.in_channels, self.num_anchors * 2, 1)
self.feature_adaption = FeatureAdaption(
self.in_channels,
self.feat_channels,
kernel_size=3,
deformable_groups=self.deformable_groups)
self.conv_cls = MaskedConv2d(self.feat_channels,
self.num_anchors * self.cls_out_channels,
1)
self.conv_reg = MaskedConv2d(self.feat_channels, self.num_anchors * 4,
1)
def init_weights(self):
normal_init(self.conv_cls, std=0.01)
normal_init(self.conv_reg, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.conv_loc, std=0.01, bias=bias_cls)
normal_init(self.conv_shape, std=0.01)
self.feature_adaption.init_weights()
def forward_single(self, x):
loc_pred = self.conv_loc(x)
shape_pred = self.conv_shape(x)
x = self.feature_adaption(x, shape_pred)
# masked conv is only used during inference for speed-up
if not self.training:
mask = loc_pred.sigmoid()[0] >= self.loc_filter_thr
else:
mask = None
cls_score = self.conv_cls(x, mask)
bbox_pred = self.conv_reg(x, mask)
return cls_score, bbox_pred, shape_pred, loc_pred
def forward(self, feats):
return multi_apply(self.forward_single, feats)
def get_sampled_approxs(self, featmap_sizes, img_metas, cfg,
device='cuda'):
"""Get sampled approxs and inside flags according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
img_metas (list[dict]): Image meta info.
device (torch.device | str): device for returned tensors
Returns:
tuple: approxes of each image, inside flags of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# approxes for one time
multi_level_approxs = []
for i in range(num_levels):
approxs = self.approx_generators[i].grid_anchors(
featmap_sizes[i], self.anchor_strides[i], device=device)
multi_level_approxs.append(approxs)
approxs_list = [multi_level_approxs for _ in range(num_imgs)]
# for each image, we compute inside flags of multi level approxes
inside_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
multi_level_approxs = approxs_list[img_id]
for i in range(num_levels):
approxs = multi_level_approxs[i]
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.approx_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
inside_flags_list = []
for i in range(self.approxs_per_octave):
split_valid_flags = flags[i::self.approxs_per_octave]
split_approxs = approxs[i::self.approxs_per_octave, :]
inside_flags = anchor_inside_flags(
split_approxs, split_valid_flags,
img_meta['img_shape'][:2], cfg.allowed_border)
inside_flags_list.append(inside_flags)
# inside_flag for a position is true if any anchor in this
# position is true
inside_flags = (
torch.stack(inside_flags_list, 0).sum(dim=0) > 0)
multi_level_flags.append(inside_flags)
inside_flag_list.append(multi_level_flags)
return approxs_list, inside_flag_list
def get_anchors(self,
featmap_sizes,
shape_preds,
loc_preds,
img_metas,
use_loc_filter=False,
device='cuda'):
"""Get squares according to feature map sizes and guided
anchors.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
shape_preds (list[tensor]): Multi-level shape predictions.
loc_preds (list[tensor]): Multi-level location predictions.
img_metas (list[dict]): Image meta info.
use_loc_filter (bool): Use loc filter or not.
device (torch.device | str): device for returned tensors
Returns:
tuple: square approxs of each image, guided anchors of each image,
loc masks of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# squares for one time
multi_level_squares = []
for i in range(num_levels):
squares = self.square_generators[i].grid_anchors(
featmap_sizes[i], self.anchor_strides[i], device=device)
multi_level_squares.append(squares)
squares_list = [multi_level_squares for _ in range(num_imgs)]
# for each image, we compute multi level guided anchors
guided_anchors_list = []
loc_mask_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_guided_anchors = []
multi_level_loc_mask = []
for i in range(num_levels):
squares = squares_list[img_id][i]
shape_pred = shape_preds[i][img_id]
loc_pred = loc_preds[i][img_id]
guided_anchors, loc_mask = self.get_guided_anchors_single(
squares,
shape_pred,
loc_pred,
use_loc_filter=use_loc_filter)
multi_level_guided_anchors.append(guided_anchors)
multi_level_loc_mask.append(loc_mask)
guided_anchors_list.append(multi_level_guided_anchors)
loc_mask_list.append(multi_level_loc_mask)
return squares_list, guided_anchors_list, loc_mask_list
def get_guided_anchors_single(self,
squares,
shape_pred,
loc_pred,
use_loc_filter=False):
"""Get guided anchors and loc masks for a single level.
Args:
square (tensor): Squares of a single level.
shape_pred (tensor): Shape predections of a single level.
loc_pred (tensor): Loc predections of a single level.
use_loc_filter (list[tensor]): Use loc filter or not.
Returns:
tuple: guided anchors, location masks
"""
# calculate location filtering mask
loc_pred = loc_pred.sigmoid().detach()
if use_loc_filter:
loc_mask = loc_pred >= self.loc_filter_thr
else:
loc_mask = loc_pred >= 0.0
mask = loc_mask.permute(1, 2, 0).expand(-1, -1, self.num_anchors)
mask = mask.contiguous().view(-1)
# calculate guided anchors
squares = squares[mask]
anchor_deltas = shape_pred.permute(1, 2, 0).contiguous().view(
-1, 2).detach()[mask]
bbox_deltas = anchor_deltas.new_full(squares.size(), 0)
bbox_deltas[:, 2:] = anchor_deltas
guided_anchors = delta2bbox(
squares,
bbox_deltas,
self.anchoring_means,
self.anchoring_stds,
wh_ratio_clip=1e-6)
return guided_anchors, mask
def loss_shape_single(self, shape_pred, bbox_anchors, bbox_gts,
anchor_weights, anchor_total_num):
shape_pred = shape_pred.permute(0, 2, 3, 1).contiguous().view(-1, 2)
bbox_anchors = bbox_anchors.contiguous().view(-1, 4)
bbox_gts = bbox_gts.contiguous().view(-1, 4)
anchor_weights = anchor_weights.contiguous().view(-1, 4)
bbox_deltas = bbox_anchors.new_full(bbox_anchors.size(), 0)
bbox_deltas[:, 2:] += shape_pred
# filter out negative samples to speed-up weighted_bounded_iou_loss
inds = torch.nonzero(anchor_weights[:, 0] > 0).squeeze(1)
bbox_deltas_ = bbox_deltas[inds]
bbox_anchors_ = bbox_anchors[inds]
bbox_gts_ = bbox_gts[inds]
anchor_weights_ = anchor_weights[inds]
pred_anchors_ = delta2bbox(
bbox_anchors_,
bbox_deltas_,
self.anchoring_means,
self.anchoring_stds,
wh_ratio_clip=1e-6)
loss_shape = self.loss_shape(
pred_anchors_,
bbox_gts_,
anchor_weights_,
avg_factor=anchor_total_num)
return loss_shape
def loss_loc_single(self, loc_pred, loc_target, loc_weight, loc_avg_factor,
cfg):
loss_loc = self.loss_loc(
loc_pred.reshape(-1, 1),
loc_target.reshape(-1, 1).long(),
loc_weight.reshape(-1, 1),
avg_factor=loc_avg_factor)
return loss_loc
@force_fp32(
apply_to=('cls_scores', 'bbox_preds', 'shape_preds', 'loc_preds'))
def loss(self,
cls_scores,
bbox_preds,
shape_preds,
loc_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.approx_generators)
device = cls_scores[0].device
# get loc targets
loc_targets, loc_weights, loc_avg_factor = ga_loc_target(
gt_bboxes,
featmap_sizes,
self.octave_base_scale,
self.anchor_strides,
center_ratio=cfg.center_ratio,
ignore_ratio=cfg.ignore_ratio)
# get sampled approxes
approxs_list, inside_flag_list = self.get_sampled_approxs(
featmap_sizes, img_metas, cfg, device=device)
# get squares and guided anchors
squares_list, guided_anchors_list, _ = self.get_anchors(
featmap_sizes, shape_preds, loc_preds, img_metas, device=device)
# get shape targets
sampling = False if not hasattr(cfg, 'ga_sampler') else True
shape_targets = ga_shape_target(
approxs_list,
inside_flag_list,
squares_list,
gt_bboxes,
img_metas,
self.approxs_per_octave,
cfg,
sampling=sampling)
if shape_targets is None:
return None
(bbox_anchors_list, bbox_gts_list, anchor_weights_list, anchor_fg_num,
anchor_bg_num) = shape_targets
anchor_total_num = (
anchor_fg_num if not sampling else anchor_fg_num + anchor_bg_num)
# get anchor targets
sampling = False if self.cls_focal_loss else True
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
guided_anchors_list,
inside_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos if self.cls_focal_loss else num_total_pos +
num_total_neg)
# get classification and bbox regression losses
losses_cls, losses_bbox = multi_apply(
self.loss_single,
cls_scores,
bbox_preds,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg)
# get anchor location loss
losses_loc = []
for i in range(len(loc_preds)):
loss_loc = self.loss_loc_single(
loc_preds[i],
loc_targets[i],
loc_weights[i],
loc_avg_factor=loc_avg_factor,
cfg=cfg)
losses_loc.append(loss_loc)
# get anchor shape loss
losses_shape = []
for i in range(len(shape_preds)):
loss_shape = self.loss_shape_single(
shape_preds[i],
bbox_anchors_list[i],
bbox_gts_list[i],
anchor_weights_list[i],
anchor_total_num=anchor_total_num)
losses_shape.append(loss_shape)
return dict(
loss_cls=losses_cls,
loss_bbox=losses_bbox,
loss_shape=losses_shape,
loss_loc=losses_loc)
@force_fp32(
apply_to=('cls_scores', 'bbox_preds', 'shape_preds', 'loc_preds'))
def get_bboxes(self,
cls_scores,
bbox_preds,
shape_preds,
loc_preds,
img_metas,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds) == len(shape_preds) == len(
loc_preds)
num_levels = len(cls_scores)
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
device = cls_scores[0].device
# get guided anchors
_, guided_anchors, loc_masks = self.get_anchors(
featmap_sizes,
shape_preds,
loc_preds,
img_metas,
use_loc_filter=not self.training,
device=device)
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() for i in range(num_levels)
]
guided_anchor_list = [
guided_anchors[img_id][i].detach() for i in range(num_levels)
]
loc_mask_list = [
loc_masks[img_id][i].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
guided_anchor_list,
loc_mask_list, img_shape,
scale_factor, cfg, rescale)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_scores,
bbox_preds,
mlvl_anchors,
mlvl_masks,
img_shape,
scale_factor,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds) == len(mlvl_anchors)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, anchors, mask in zip(cls_scores, bbox_preds,
mlvl_anchors,
mlvl_masks):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
# if no location is kept, end.
if mask.sum() == 0:
continue
# reshape scores and bbox_pred
cls_score = cls_score.permute(1, 2,
0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4)
# filter scores, bbox_pred w.r.t. mask.
# anchors are filtered in get_anchors() beforehand.
scores = scores[mask, :]
bbox_pred = bbox_pred[mask, :]
if scores.dim() == 0:
anchors = anchors.unsqueeze(0)
scores = scores.unsqueeze(0)
bbox_pred = bbox_pred.unsqueeze(0)
# filter anchors, bbox_pred, scores w.r.t. scores
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
anchors = anchors[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bboxes = delta2bbox(anchors, bbox_pred, self.target_means,
self.target_stds, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
# multi class NMS
det_bboxes, det_labels = multiclass_nms(mlvl_bboxes, mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
| 25,226
| 39.820388
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads/fovea_head.py
|
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import multi_apply, multiclass_nms
from mmdet.ops import DeformConv
from ..builder import build_loss
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
INF = 1e8
class FeatureAlign(nn.Module):
def __init__(self,
in_channels,
out_channels,
kernel_size=3,
deformable_groups=4):
super(FeatureAlign, self).__init__()
offset_channels = kernel_size * kernel_size * 2
self.conv_offset = nn.Conv2d(
4, deformable_groups * offset_channels, 1, bias=False)
self.conv_adaption = DeformConv(
in_channels,
out_channels,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
deformable_groups=deformable_groups)
self.relu = nn.ReLU(inplace=True)
def init_weights(self):
normal_init(self.conv_offset, std=0.1)
normal_init(self.conv_adaption, std=0.01)
def forward(self, x, shape):
offset = self.conv_offset(shape)
x = self.relu(self.conv_adaption(x, offset))
return x
@HEADS.register_module
class FoveaHead(nn.Module):
"""FoveaBox: Beyond Anchor-based Object Detector
https://arxiv.org/abs/1904.03797
"""
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=4,
strides=(4, 8, 16, 32, 64),
base_edge_list=(16, 32, 64, 128, 256),
scale_ranges=((8, 32), (16, 64), (32, 128), (64, 256), (128,
512)),
sigma=0.4,
with_deform=False,
deformable_groups=4,
loss_cls=None,
loss_bbox=None,
conv_cfg=None,
norm_cfg=None):
super(FoveaHead, self).__init__()
self.num_classes = num_classes
self.cls_out_channels = num_classes - 1
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.strides = strides
self.base_edge_list = base_edge_list
self.scale_ranges = scale_ranges
self.sigma = sigma
self.with_deform = with_deform
self.deformable_groups = deformable_groups
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self._init_layers()
def _init_layers(self):
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
# box branch
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.fovea_reg = nn.Conv2d(self.feat_channels, 4, 3, padding=1)
# cls branch
if not self.with_deform:
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.fovea_cls = nn.Conv2d(
self.feat_channels, self.cls_out_channels, 3, padding=1)
else:
self.cls_convs.append(
ConvModule(
self.feat_channels, (self.feat_channels * 4),
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.cls_convs.append(
ConvModule((self.feat_channels * 4), (self.feat_channels * 4),
1,
stride=1,
padding=0,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
bias=self.norm_cfg is None))
self.feature_adaption = FeatureAlign(
self.feat_channels,
self.feat_channels,
kernel_size=3,
deformable_groups=self.deformable_groups)
self.fovea_cls = nn.Conv2d(
int(self.feat_channels * 4),
self.cls_out_channels,
3,
padding=1)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.fovea_cls, std=0.01, bias=bias_cls)
normal_init(self.fovea_reg, std=0.01)
if self.with_deform:
self.feature_adaption.init_weights()
def forward(self, feats):
return multi_apply(self.forward_single, feats)
def forward_single(self, x):
cls_feat = x
reg_feat = x
for reg_layer in self.reg_convs:
reg_feat = reg_layer(reg_feat)
bbox_pred = self.fovea_reg(reg_feat)
if self.with_deform:
cls_feat = self.feature_adaption(cls_feat, bbox_pred.exp())
for cls_layer in self.cls_convs:
cls_feat = cls_layer(cls_feat)
cls_score = self.fovea_cls(cls_feat)
return cls_score, bbox_pred
def get_points(self, featmap_sizes, dtype, device, flatten=False):
points = []
for featmap_size in featmap_sizes:
x_range = torch.arange(
featmap_size[1], dtype=dtype, device=device) + 0.5
y_range = torch.arange(
featmap_size[0], dtype=dtype, device=device) + 0.5
y, x = torch.meshgrid(y_range, x_range)
if flatten:
points.append((y.flatten(), x.flatten()))
else:
points.append((y, x))
return points
def loss(self,
cls_scores,
bbox_preds,
gt_bbox_list,
gt_label_list,
img_metas,
cfg,
gt_bboxes_ignore=None):
assert len(cls_scores) == len(bbox_preds)
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
points = self.get_points(featmap_sizes, bbox_preds[0].dtype,
bbox_preds[0].device)
num_imgs = cls_scores[0].size(0)
flatten_cls_scores = [
cls_score.permute(0, 2, 3, 1).reshape(-1, self.cls_out_channels)
for cls_score in cls_scores
]
flatten_bbox_preds = [
bbox_pred.permute(0, 2, 3, 1).reshape(-1, 4)
for bbox_pred in bbox_preds
]
flatten_cls_scores = torch.cat(flatten_cls_scores)
flatten_bbox_preds = torch.cat(flatten_bbox_preds)
flatten_labels, flatten_bbox_targets = self.fovea_target(
gt_bbox_list, gt_label_list, featmap_sizes, points)
pos_inds = (flatten_labels > 0).nonzero().view(-1)
num_pos = len(pos_inds)
loss_cls = self.loss_cls(
flatten_cls_scores, flatten_labels, avg_factor=num_pos + num_imgs)
if num_pos > 0:
pos_bbox_preds = flatten_bbox_preds[pos_inds]
pos_bbox_targets = flatten_bbox_targets[pos_inds]
pos_weights = pos_bbox_targets.new_zeros(
pos_bbox_targets.size()) + 1.0
loss_bbox = self.loss_bbox(
pos_bbox_preds,
pos_bbox_targets,
pos_weights,
avg_factor=num_pos)
else:
loss_bbox = torch.tensor([0],
dtype=flatten_bbox_preds.dtype,
device=flatten_bbox_preds.device)
return dict(loss_cls=loss_cls, loss_bbox=loss_bbox)
def fovea_target(self, gt_bbox_list, gt_label_list, featmap_sizes, points):
label_list, bbox_target_list = multi_apply(
self.fovea_target_single,
gt_bbox_list,
gt_label_list,
featmap_size_list=featmap_sizes,
point_list=points)
flatten_labels = [
torch.cat([
labels_level_img.flatten() for labels_level_img in labels_level
]) for labels_level in zip(*label_list)
]
flatten_bbox_targets = [
torch.cat([
bbox_targets_level_img.reshape(-1, 4)
for bbox_targets_level_img in bbox_targets_level
]) for bbox_targets_level in zip(*bbox_target_list)
]
flatten_labels = torch.cat(flatten_labels)
flatten_bbox_targets = torch.cat(flatten_bbox_targets)
return flatten_labels, flatten_bbox_targets
def fovea_target_single(self,
gt_bboxes_raw,
gt_labels_raw,
featmap_size_list=None,
point_list=None):
gt_areas = torch.sqrt((gt_bboxes_raw[:, 2] - gt_bboxes_raw[:, 0]) *
(gt_bboxes_raw[:, 3] - gt_bboxes_raw[:, 1]))
label_list = []
bbox_target_list = []
# for each pyramid, find the cls and box target
for base_len, (lower_bound, upper_bound), stride, featmap_size, \
(y, x) in zip(self.base_edge_list, self.scale_ranges,
self.strides, featmap_size_list, point_list):
labels = gt_labels_raw.new_zeros(featmap_size)
bbox_targets = gt_bboxes_raw.new(featmap_size[0], featmap_size[1],
4) + 1
# scale assignment
hit_indices = ((gt_areas >= lower_bound) &
(gt_areas <= upper_bound)).nonzero().flatten()
if len(hit_indices) == 0:
label_list.append(labels)
bbox_target_list.append(torch.log(bbox_targets))
continue
_, hit_index_order = torch.sort(-gt_areas[hit_indices])
hit_indices = hit_indices[hit_index_order]
gt_bboxes = gt_bboxes_raw[hit_indices, :] / stride
gt_labels = gt_labels_raw[hit_indices]
half_w = 0.5 * (gt_bboxes[:, 2] - gt_bboxes[:, 0])
half_h = 0.5 * (gt_bboxes[:, 3] - gt_bboxes[:, 1])
# valid fovea area: left, right, top, down
pos_left = torch.ceil(
gt_bboxes[:, 0] + (1 - self.sigma) * half_w - 0.5).long().\
clamp(0, featmap_size[1] - 1)
pos_right = torch.floor(
gt_bboxes[:, 0] + (1 + self.sigma) * half_w - 0.5).long().\
clamp(0, featmap_size[1] - 1)
pos_top = torch.ceil(
gt_bboxes[:, 1] + (1 - self.sigma) * half_h - 0.5).long().\
clamp(0, featmap_size[0] - 1)
pos_down = torch.floor(
gt_bboxes[:, 1] + (1 + self.sigma) * half_h - 0.5).long().\
clamp(0, featmap_size[0] - 1)
for px1, py1, px2, py2, label, (gt_x1, gt_y1, gt_x2, gt_y2) in \
zip(pos_left, pos_top, pos_right, pos_down, gt_labels,
gt_bboxes_raw[hit_indices, :]):
labels[py1:py2 + 1, px1:px2 + 1] = label
bbox_targets[py1:py2 + 1, px1:px2 + 1, 0] = \
(stride * x[py1:py2 + 1, px1:px2 + 1] - gt_x1) / base_len
bbox_targets[py1:py2 + 1, px1:px2 + 1, 1] = \
(stride * y[py1:py2 + 1, px1:px2 + 1] - gt_y1) / base_len
bbox_targets[py1:py2 + 1, px1:px2 + 1, 2] = \
(gt_x2 - stride * x[py1:py2 + 1, px1:px2 + 1]) / base_len
bbox_targets[py1:py2 + 1, px1:px2 + 1, 3] = \
(gt_y2 - stride * y[py1:py2 + 1, px1:px2 + 1]) / base_len
bbox_targets = bbox_targets.clamp(min=1. / 16, max=16.)
label_list.append(labels)
bbox_target_list.append(torch.log(bbox_targets))
return label_list, bbox_target_list
def get_bboxes(self, cls_scores, bbox_preds, img_metas, cfg, rescale=None):
assert len(cls_scores) == len(bbox_preds)
num_levels = len(cls_scores)
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
points = self.get_points(
featmap_sizes,
bbox_preds[0].dtype,
bbox_preds[0].device,
flatten=True)
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
det_bboxes = self.get_bboxes_single(cls_score_list, bbox_pred_list,
featmap_sizes, points,
img_shape, scale_factor, cfg,
rescale)
result_list.append(det_bboxes)
return result_list
def get_bboxes_single(self,
cls_scores,
bbox_preds,
featmap_sizes,
point_list,
img_shape,
scale_factor,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds) == len(point_list)
det_bboxes = []
det_scores = []
for cls_score, bbox_pred, featmap_size, stride, base_len, (y, x) \
in zip(cls_scores, bbox_preds, featmap_sizes, self.strides,
self.base_edge_list, point_list):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
scores = cls_score.permute(1, 2, 0).reshape(
-1, self.cls_out_channels).sigmoid()
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 4).exp()
nms_pre = cfg.get('nms_pre', -1)
if (nms_pre > 0) and (scores.shape[0] > nms_pre):
max_scores, _ = scores.max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
y = y[topk_inds]
x = x[topk_inds]
x1 = (stride * x - base_len * bbox_pred[:, 0]).\
clamp(min=0, max=img_shape[1] - 1)
y1 = (stride * y - base_len * bbox_pred[:, 1]).\
clamp(min=0, max=img_shape[0] - 1)
x2 = (stride * x + base_len * bbox_pred[:, 2]).\
clamp(min=0, max=img_shape[1] - 1)
y2 = (stride * y + base_len * bbox_pred[:, 3]).\
clamp(min=0, max=img_shape[0] - 1)
bboxes = torch.stack([x1, y1, x2, y2], -1)
det_bboxes.append(bboxes)
det_scores.append(scores)
det_bboxes = torch.cat(det_bboxes)
if rescale:
det_bboxes /= det_bboxes.new_tensor(scale_factor)
det_scores = torch.cat(det_scores)
padding = det_scores.new_zeros(det_scores.shape[0], 1)
det_scores = torch.cat([padding, det_scores], dim=1)
det_bboxes, det_labels = multiclass_nms(det_bboxes, det_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
| 16,360
| 41.167526
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads/bbox_head.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.nn.modules.utils import _pair
from mmdet.core import (auto_fp16, bbox_target, delta2bbox, force_fp32,
multiclass_nms)
from ..builder import build_loss
from ..losses import accuracy
from ..registry import HEADS
@HEADS.register_module
class BBoxHead(nn.Module):
"""Simplest RoI head, with only two fc layers for classification and
regression respectively"""
def __init__(self,
with_avg_pool=False,
with_cls=True,
with_reg=True,
roi_feat_size=7,
in_channels=256,
num_classes=81,
target_means=[0., 0., 0., 0.],
target_stds=[0.1, 0.1, 0.2, 0.2],
reg_class_agnostic=False,
loss_cls=dict(
type='CrossEntropyLoss',
use_sigmoid=False,
loss_weight=1.0),
loss_bbox=dict(
type='SmoothL1Loss', beta=1.0, loss_weight=1.0)):
super(BBoxHead, self).__init__()
assert with_cls or with_reg
self.with_avg_pool = with_avg_pool
self.with_cls = with_cls
self.with_reg = with_reg
self.roi_feat_size = _pair(roi_feat_size)
self.roi_feat_area = self.roi_feat_size[0] * self.roi_feat_size[1]
self.in_channels = in_channels
self.num_classes = num_classes
self.target_means = target_means
self.target_stds = target_stds
self.reg_class_agnostic = reg_class_agnostic
self.fp16_enabled = False
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
in_channels = self.in_channels
if self.with_avg_pool:
self.avg_pool = nn.AvgPool2d(self.roi_feat_size)
else:
in_channels *= self.roi_feat_area
if self.with_cls:
self.fc_cls = nn.Linear(in_channels, num_classes)
if self.with_reg:
out_dim_reg = 4 if reg_class_agnostic else 4 * num_classes
self.fc_reg = nn.Linear(in_channels, out_dim_reg)
self.debug_imgs = None
def init_weights(self):
if self.with_cls:
nn.init.normal_(self.fc_cls.weight, 0, 0.01)
nn.init.constant_(self.fc_cls.bias, 0)
if self.with_reg:
nn.init.normal_(self.fc_reg.weight, 0, 0.001)
nn.init.constant_(self.fc_reg.bias, 0)
@auto_fp16()
def forward(self, x):
if self.with_avg_pool:
x = self.avg_pool(x)
x = x.view(x.size(0), -1)
cls_score = self.fc_cls(x) if self.with_cls else None
bbox_pred = self.fc_reg(x) if self.with_reg else None
return cls_score, bbox_pred
def get_target(self, sampling_results, gt_bboxes, gt_labels,
rcnn_train_cfg):
pos_proposals = [res.pos_bboxes for res in sampling_results]
neg_proposals = [res.neg_bboxes for res in sampling_results]
pos_gt_bboxes = [res.pos_gt_bboxes for res in sampling_results]
pos_gt_labels = [res.pos_gt_labels for res in sampling_results]
reg_classes = 1 if self.reg_class_agnostic else self.num_classes
cls_reg_targets = bbox_target(
pos_proposals,
neg_proposals,
pos_gt_bboxes,
pos_gt_labels,
rcnn_train_cfg,
reg_classes,
target_means=self.target_means,
target_stds=self.target_stds)
return cls_reg_targets
@force_fp32(apply_to=('cls_score', 'bbox_pred'))
def loss(self,
cls_score,
bbox_pred,
labels,
label_weights,
bbox_targets,
bbox_weights,
reduction_override=None):
losses = dict()
if cls_score is not None:
avg_factor = max(torch.sum(label_weights > 0).float().item(), 1.)
losses['loss_cls'] = self.loss_cls(
cls_score,
labels,
label_weights,
avg_factor=avg_factor,
reduction_override=reduction_override)
losses['acc'] = accuracy(cls_score, labels)
if bbox_pred is not None:
pos_inds = labels > 0
if self.reg_class_agnostic:
pos_bbox_pred = bbox_pred.view(bbox_pred.size(0), 4)[pos_inds]
else:
pos_bbox_pred = bbox_pred.view(bbox_pred.size(0), -1,
4)[pos_inds, labels[pos_inds]]
losses['loss_bbox'] = self.loss_bbox(
pos_bbox_pred,
bbox_targets[pos_inds],
bbox_weights[pos_inds],
avg_factor=bbox_targets.size(0),
reduction_override=reduction_override)
return losses
@force_fp32(apply_to=('cls_score', 'bbox_pred'))
def get_det_bboxes(self,
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None):
if isinstance(cls_score, list):
cls_score = sum(cls_score) / float(len(cls_score))
scores = F.softmax(cls_score, dim=1) if cls_score is not None else None
if bbox_pred is not None:
bboxes = delta2bbox(rois[:, 1:], bbox_pred, self.target_means,
self.target_stds, img_shape)
else:
bboxes = rois[:, 1:].clone()
if img_shape is not None:
bboxes[:, [0, 2]].clamp_(min=0, max=img_shape[1] - 1)
bboxes[:, [1, 3]].clamp_(min=0, max=img_shape[0] - 1)
if rescale:
if isinstance(scale_factor, float):
bboxes /= scale_factor
else:
bboxes /= torch.from_numpy(scale_factor).to(bboxes.device)
if cfg is None:
return bboxes, scores
else:
det_bboxes, det_labels = multiclass_nms(bboxes, scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
@force_fp32(apply_to=('bbox_preds', ))
def refine_bboxes(self, rois, labels, bbox_preds, pos_is_gts, img_metas):
"""Refine bboxes during training.
Args:
rois (Tensor): Shape (n*bs, 5), where n is image number per GPU,
and bs is the sampled RoIs per image.
labels (Tensor): Shape (n*bs, ).
bbox_preds (Tensor): Shape (n*bs, 4) or (n*bs, 4*#class).
pos_is_gts (list[Tensor]): Flags indicating if each positive bbox
is a gt bbox.
img_metas (list[dict]): Meta info of each image.
Returns:
list[Tensor]: Refined bboxes of each image in a mini-batch.
"""
img_ids = rois[:, 0].long().unique(sorted=True)
assert img_ids.numel() == len(img_metas)
bboxes_list = []
for i in range(len(img_metas)):
inds = torch.nonzero(rois[:, 0] == i).squeeze()
num_rois = inds.numel()
bboxes_ = rois[inds, 1:]
label_ = labels[inds]
bbox_pred_ = bbox_preds[inds]
img_meta_ = img_metas[i]
pos_is_gts_ = pos_is_gts[i]
bboxes = self.regress_by_class(bboxes_, label_, bbox_pred_,
img_meta_)
# filter gt bboxes
pos_keep = 1 - pos_is_gts_
keep_inds = pos_is_gts_.new_ones(num_rois)
keep_inds[:len(pos_is_gts_)] = pos_keep
bboxes_list.append(bboxes[keep_inds])
return bboxes_list
@force_fp32(apply_to=('bbox_pred', ))
def regress_by_class(self, rois, label, bbox_pred, img_meta):
"""Regress the bbox for the predicted class. Used in Cascade R-CNN.
Args:
rois (Tensor): shape (n, 4) or (n, 5)
label (Tensor): shape (n, )
bbox_pred (Tensor): shape (n, 4*(#class+1)) or (n, 4)
img_meta (dict): Image meta info.
Returns:
Tensor: Regressed bboxes, the same shape as input rois.
"""
assert rois.size(1) == 4 or rois.size(1) == 5
if not self.reg_class_agnostic:
label = label * 4
inds = torch.stack((label, label + 1, label + 2, label + 3), 1)
bbox_pred = torch.gather(bbox_pred, 1, inds)
assert bbox_pred.size(1) == 4
if rois.size(1) == 4:
new_rois = delta2bbox(rois, bbox_pred, self.target_means,
self.target_stds, img_meta['img_shape'])
else:
bboxes = delta2bbox(rois[:, 1:], bbox_pred, self.target_means,
self.target_stds, img_meta['img_shape'])
new_rois = torch.cat((rois[:, [0]], bboxes), dim=1)
return new_rois
| 9,111
| 36.966667
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads/__init__.py
|
from .bbox_head import BBoxHead
from .convfc_bbox_head import ConvFCBBoxHead, SharedFCBBoxHead
from .double_bbox_head import DoubleConvFCBBoxHead
__all__ = [
'BBoxHead', 'ConvFCBBoxHead', 'SharedFCBBoxHead', 'DoubleConvFCBBoxHead'
]
| 238
| 28.875
| 76
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads/convfc_bbox_head.py
|
import torch.nn as nn
from ..registry import HEADS
from ..utils import ConvModule
from .bbox_head import BBoxHead
@HEADS.register_module
class ConvFCBBoxHead(BBoxHead):
r"""More general bbox head, with shared conv and fc layers and two optional
separated branches.
/-> cls convs -> cls fcs -> cls
shared convs -> shared fcs
\-> reg convs -> reg fcs -> reg
""" # noqa: W605
def __init__(self,
num_shared_convs=0,
num_shared_fcs=0,
num_cls_convs=0,
num_cls_fcs=0,
num_reg_convs=0,
num_reg_fcs=0,
conv_out_channels=256,
fc_out_channels=1024,
conv_cfg=None,
norm_cfg=None,
*args,
**kwargs):
super(ConvFCBBoxHead, self).__init__(*args, **kwargs)
assert (num_shared_convs + num_shared_fcs + num_cls_convs +
num_cls_fcs + num_reg_convs + num_reg_fcs > 0)
if num_cls_convs > 0 or num_reg_convs > 0:
assert num_shared_fcs == 0
if not self.with_cls:
assert num_cls_convs == 0 and num_cls_fcs == 0
if not self.with_reg:
assert num_reg_convs == 0 and num_reg_fcs == 0
self.num_shared_convs = num_shared_convs
self.num_shared_fcs = num_shared_fcs
self.num_cls_convs = num_cls_convs
self.num_cls_fcs = num_cls_fcs
self.num_reg_convs = num_reg_convs
self.num_reg_fcs = num_reg_fcs
self.conv_out_channels = conv_out_channels
self.fc_out_channels = fc_out_channels
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
# add shared convs and fcs
self.shared_convs, self.shared_fcs, last_layer_dim = \
self._add_conv_fc_branch(
self.num_shared_convs, self.num_shared_fcs, self.in_channels,
True)
self.shared_out_channels = last_layer_dim
# add cls specific branch
self.cls_convs, self.cls_fcs, self.cls_last_dim = \
self._add_conv_fc_branch(
self.num_cls_convs, self.num_cls_fcs, self.shared_out_channels)
# add reg specific branch
self.reg_convs, self.reg_fcs, self.reg_last_dim = \
self._add_conv_fc_branch(
self.num_reg_convs, self.num_reg_fcs, self.shared_out_channels)
if self.num_shared_fcs == 0 and not self.with_avg_pool:
if self.num_cls_fcs == 0:
self.cls_last_dim *= self.roi_feat_area
if self.num_reg_fcs == 0:
self.reg_last_dim *= self.roi_feat_area
self.relu = nn.ReLU(inplace=True)
# reconstruct fc_cls and fc_reg since input channels are changed
if self.with_cls:
self.fc_cls = nn.Linear(self.cls_last_dim, self.num_classes)
if self.with_reg:
out_dim_reg = (4 if self.reg_class_agnostic else 4 *
self.num_classes)
self.fc_reg = nn.Linear(self.reg_last_dim, out_dim_reg)
def _add_conv_fc_branch(self,
num_branch_convs,
num_branch_fcs,
in_channels,
is_shared=False):
"""Add shared or separable branch
convs -> avg pool (optional) -> fcs
"""
last_layer_dim = in_channels
# add branch specific conv layers
branch_convs = nn.ModuleList()
if num_branch_convs > 0:
for i in range(num_branch_convs):
conv_in_channels = (
last_layer_dim if i == 0 else self.conv_out_channels)
branch_convs.append(
ConvModule(
conv_in_channels,
self.conv_out_channels,
3,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
last_layer_dim = self.conv_out_channels
# add branch specific fc layers
branch_fcs = nn.ModuleList()
if num_branch_fcs > 0:
# for shared branch, only consider self.with_avg_pool
# for separated branches, also consider self.num_shared_fcs
if (is_shared
or self.num_shared_fcs == 0) and not self.with_avg_pool:
last_layer_dim *= self.roi_feat_area
for i in range(num_branch_fcs):
fc_in_channels = (
last_layer_dim if i == 0 else self.fc_out_channels)
branch_fcs.append(
nn.Linear(fc_in_channels, self.fc_out_channels))
last_layer_dim = self.fc_out_channels
return branch_convs, branch_fcs, last_layer_dim
def init_weights(self):
super(ConvFCBBoxHead, self).init_weights()
for module_list in [self.shared_fcs, self.cls_fcs, self.reg_fcs]:
for m in module_list.modules():
if isinstance(m, nn.Linear):
nn.init.xavier_uniform_(m.weight)
nn.init.constant_(m.bias, 0)
def forward(self, x):
# shared part
if self.num_shared_convs > 0:
for conv in self.shared_convs:
x = conv(x)
if self.num_shared_fcs > 0:
if self.with_avg_pool:
x = self.avg_pool(x)
x = x.view(x.size(0), -1)
for fc in self.shared_fcs:
x = self.relu(fc(x))
# separate branches
x_cls = x
x_reg = x
for conv in self.cls_convs:
x_cls = conv(x_cls)
if x_cls.dim() > 2:
if self.with_avg_pool:
x_cls = self.avg_pool(x_cls)
x_cls = x_cls.view(x_cls.size(0), -1)
for fc in self.cls_fcs:
x_cls = self.relu(fc(x_cls))
for conv in self.reg_convs:
x_reg = conv(x_reg)
if x_reg.dim() > 2:
if self.with_avg_pool:
x_reg = self.avg_pool(x_reg)
x_reg = x_reg.view(x_reg.size(0), -1)
for fc in self.reg_fcs:
x_reg = self.relu(fc(x_reg))
cls_score = self.fc_cls(x_cls) if self.with_cls else None
bbox_pred = self.fc_reg(x_reg) if self.with_reg else None
return cls_score, bbox_pred
@HEADS.register_module
class SharedFCBBoxHead(ConvFCBBoxHead):
def __init__(self, num_fcs=2, fc_out_channels=1024, *args, **kwargs):
assert num_fcs >= 1
super(SharedFCBBoxHead, self).__init__(
num_shared_convs=0,
num_shared_fcs=num_fcs,
num_cls_convs=0,
num_cls_fcs=0,
num_reg_convs=0,
num_reg_fcs=0,
fc_out_channels=fc_out_channels,
*args,
**kwargs)
| 6,943
| 36.333333
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads/double_bbox_head.py
|
import torch.nn as nn
from mmcv.cnn.weight_init import normal_init, xavier_init
from ..backbones.resnet import Bottleneck
from ..registry import HEADS
from ..utils import ConvModule
from .bbox_head import BBoxHead
class BasicResBlock(nn.Module):
"""Basic residual block.
This block is a little different from the block in the ResNet backbone.
The kernel size of conv1 is 1 in this block while 3 in ResNet BasicBlock.
Args:
in_channels (int): Channels of the input feature map.
out_channels (int): Channels of the output feature map.
conv_cfg (dict): The config dict for convolution layers.
norm_cfg (dict): The config dict for normalization layers.
"""
def __init__(self,
in_channels,
out_channels,
conv_cfg=None,
norm_cfg=dict(type='BN')):
super(BasicResBlock, self).__init__()
# main path
self.conv1 = ConvModule(
in_channels,
in_channels,
kernel_size=3,
padding=1,
bias=False,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg)
self.conv2 = ConvModule(
in_channels,
out_channels,
kernel_size=1,
bias=False,
activation=None,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg)
# identity path
self.conv_identity = ConvModule(
in_channels,
out_channels,
kernel_size=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
activation=None)
self.relu = nn.ReLU(inplace=True)
def forward(self, x):
identity = x
x = self.conv1(x)
x = self.conv2(x)
identity = self.conv_identity(identity)
out = x + identity
out = self.relu(out)
return out
@HEADS.register_module
class DoubleConvFCBBoxHead(BBoxHead):
r"""Bbox head used in Double-Head R-CNN
/-> cls
/-> shared convs ->
\-> reg
roi features
/-> cls
\-> shared fc ->
\-> reg
""" # noqa: W605
def __init__(self,
num_convs=0,
num_fcs=0,
conv_out_channels=1024,
fc_out_channels=1024,
conv_cfg=None,
norm_cfg=dict(type='BN'),
**kwargs):
kwargs.setdefault('with_avg_pool', True)
super(DoubleConvFCBBoxHead, self).__init__(**kwargs)
assert self.with_avg_pool
assert num_convs > 0
assert num_fcs > 0
self.num_convs = num_convs
self.num_fcs = num_fcs
self.conv_out_channels = conv_out_channels
self.fc_out_channels = fc_out_channels
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
# increase the channel of input features
self.res_block = BasicResBlock(self.in_channels,
self.conv_out_channels)
# add conv heads
self.conv_branch = self._add_conv_branch()
# add fc heads
self.fc_branch = self._add_fc_branch()
out_dim_reg = 4 if self.reg_class_agnostic else 4 * self.num_classes
self.fc_reg = nn.Linear(self.conv_out_channels, out_dim_reg)
self.fc_cls = nn.Linear(self.fc_out_channels, self.num_classes)
self.relu = nn.ReLU(inplace=True)
def _add_conv_branch(self):
"""Add the fc branch which consists of a sequential of conv layers"""
branch_convs = nn.ModuleList()
for i in range(self.num_convs):
branch_convs.append(
Bottleneck(
inplanes=self.conv_out_channels,
planes=self.conv_out_channels // 4,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
return branch_convs
def _add_fc_branch(self):
"""Add the fc branch which consists of a sequential of fc layers"""
branch_fcs = nn.ModuleList()
for i in range(self.num_fcs):
fc_in_channels = (
self.in_channels *
self.roi_feat_area if i == 0 else self.fc_out_channels)
branch_fcs.append(nn.Linear(fc_in_channels, self.fc_out_channels))
return branch_fcs
def init_weights(self):
normal_init(self.fc_cls, std=0.01)
normal_init(self.fc_reg, std=0.001)
for m in self.fc_branch.modules():
if isinstance(m, nn.Linear):
xavier_init(m, distribution='uniform')
def forward(self, x_cls, x_reg):
# conv head
x_conv = self.res_block(x_reg)
for conv in self.conv_branch:
x_conv = conv(x_conv)
if self.with_avg_pool:
x_conv = self.avg_pool(x_conv)
x_conv = x_conv.view(x_conv.size(0), -1)
bbox_pred = self.fc_reg(x_conv)
# fc head
x_fc = x_cls.view(x_cls.size(0), -1)
for fc in self.fc_branch:
x_fc = self.relu(fc(x_fc))
cls_score = self.fc_cls(x_fc)
return cls_score, bbox_pred
| 5,274
| 29.847953
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/shared_heads/res_layer.py
|
import logging
import torch.nn as nn
from mmcv.cnn import constant_init, kaiming_init
from mmcv.runner import load_checkpoint
from mmdet.core import auto_fp16
from ..backbones import ResNet, make_res_layer
from ..registry import SHARED_HEADS
@SHARED_HEADS.register_module
class ResLayer(nn.Module):
def __init__(self,
depth,
stage=3,
stride=2,
dilation=1,
style='pytorch',
norm_cfg=dict(type='BN', requires_grad=True),
norm_eval=True,
with_cp=False,
dcn=None):
super(ResLayer, self).__init__()
self.norm_eval = norm_eval
self.norm_cfg = norm_cfg
self.stage = stage
self.fp16_enabled = False
block, stage_blocks = ResNet.arch_settings[depth]
stage_block = stage_blocks[stage]
planes = 64 * 2**stage
inplanes = 64 * 2**(stage - 1) * block.expansion
res_layer = make_res_layer(
block,
inplanes,
planes,
stage_block,
stride=stride,
dilation=dilation,
style=style,
with_cp=with_cp,
norm_cfg=self.norm_cfg,
dcn=dcn)
self.add_module('layer{}'.format(stage + 1), res_layer)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
else:
raise TypeError('pretrained must be a str or None')
@auto_fp16()
def forward(self, x):
res_layer = getattr(self, 'layer{}'.format(self.stage + 1))
out = res_layer(x)
return out
def train(self, mode=True):
super(ResLayer, self).train(mode)
if self.norm_eval:
for m in self.modules():
if isinstance(m, nn.BatchNorm2d):
m.eval()
| 2,236
| 29.643836
| 74
|
py
|
s2anet
|
s2anet-master/mmdet/models/shared_heads/__init__.py
|
from .res_layer import ResLayer
__all__ = ['ResLayer']
| 56
| 13.25
| 31
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/weight_init.py
|
import numpy as np
import torch.nn as nn
def xavier_init(module, gain=1, bias=0, distribution='normal'):
assert distribution in ['uniform', 'normal']
if distribution == 'uniform':
nn.init.xavier_uniform_(module.weight, gain=gain)
else:
nn.init.xavier_normal_(module.weight, gain=gain)
if hasattr(module, 'bias'):
nn.init.constant_(module.bias, bias)
def normal_init(module, mean=0, std=1, bias=0):
nn.init.normal_(module.weight, mean, std)
if hasattr(module, 'bias'):
nn.init.constant_(module.bias, bias)
def uniform_init(module, a=0, b=1, bias=0):
nn.init.uniform_(module.weight, a, b)
if hasattr(module, 'bias'):
nn.init.constant_(module.bias, bias)
def kaiming_init(module,
mode='fan_out',
nonlinearity='relu',
bias=0,
distribution='normal'):
assert distribution in ['uniform', 'normal']
if distribution == 'uniform':
nn.init.kaiming_uniform_(
module.weight, mode=mode, nonlinearity=nonlinearity)
else:
nn.init.kaiming_normal_(
module.weight, mode=mode, nonlinearity=nonlinearity)
if hasattr(module, 'bias'):
nn.init.constant_(module.bias, bias)
def bias_init_with_prob(prior_prob):
""" initialize conv/fc bias value according to giving probablity"""
bias_init = float(-np.log((1 - prior_prob) / prior_prob))
return bias_init
| 1,455
| 29.978723
| 71
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/norm.py
|
import torch.nn as nn
norm_cfg = {
# format: layer_type: (abbreviation, module)
'BN': ('bn', nn.BatchNorm2d),
'SyncBN': ('bn', nn.SyncBatchNorm),
'GN': ('gn', nn.GroupNorm),
# and potentially 'SN'
}
def build_norm_layer(cfg, num_features, postfix=''):
""" Build normalization layer
Args:
cfg (dict): cfg should contain:
type (str): identify norm layer type.
layer args: args needed to instantiate a norm layer.
requires_grad (bool): [optional] whether stop gradient updates
num_features (int): number of channels from input.
postfix (int, str): appended into norm abbreviation to
create named layer.
Returns:
name (str): abbreviation + postfix
layer (nn.Module): created norm layer
"""
assert isinstance(cfg, dict) and 'type' in cfg
cfg_ = cfg.copy()
layer_type = cfg_.pop('type')
if layer_type not in norm_cfg:
raise KeyError('Unrecognized norm type {}'.format(layer_type))
else:
abbr, norm_layer = norm_cfg[layer_type]
if norm_layer is None:
raise NotImplementedError
assert isinstance(postfix, (int, str))
name = abbr + str(postfix)
requires_grad = cfg_.pop('requires_grad', True)
cfg_.setdefault('eps', 1e-5)
if layer_type != 'GN':
layer = norm_layer(num_features, **cfg_)
if layer_type == 'SyncBN':
layer._specify_ddp_gpu_num(1)
else:
assert 'num_groups' in cfg_
layer = norm_layer(num_channels=num_features, **cfg_)
for param in layer.parameters():
param.requires_grad = requires_grad
return name, layer
| 1,684
| 29.089286
| 74
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/scale.py
|
import torch
import torch.nn as nn
class Scale(nn.Module):
"""
A learnable scale parameter
"""
def __init__(self, scale=1.0):
super(Scale, self).__init__()
self.scale = nn.Parameter(torch.tensor(scale, dtype=torch.float))
def forward(self, x):
return x * self.scale
| 314
| 18.6875
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/conv_ws.py
|
import torch.nn as nn
import torch.nn.functional as F
def conv_ws_2d(input,
weight,
bias=None,
stride=1,
padding=0,
dilation=1,
groups=1,
eps=1e-5):
c_in = weight.size(0)
weight_flat = weight.view(c_in, -1)
mean = weight_flat.mean(dim=1, keepdim=True).view(c_in, 1, 1, 1)
std = weight_flat.std(dim=1, keepdim=True).view(c_in, 1, 1, 1)
weight = (weight - mean) / (std + eps)
return F.conv2d(input, weight, bias, stride, padding, dilation, groups)
class ConvWS2d(nn.Conv2d):
def __init__(self,
in_channels,
out_channels,
kernel_size,
stride=1,
padding=0,
dilation=1,
groups=1,
bias=True,
eps=1e-5):
super(ConvWS2d, self).__init__(
in_channels,
out_channels,
kernel_size,
stride=stride,
padding=padding,
dilation=dilation,
groups=groups,
bias=bias)
self.eps = eps
def forward(self, x):
return conv_ws_2d(x, self.weight, self.bias, self.stride, self.padding,
self.dilation, self.groups, self.eps)
| 1,335
| 27.425532
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/conv_module.py
|
import warnings
import torch.nn as nn
from mmcv.cnn import constant_init, kaiming_init
from .conv_ws import ConvWS2d
from .norm import build_norm_layer
conv_cfg = {
'Conv': nn.Conv2d,
'ConvWS': ConvWS2d,
# TODO: octave conv
}
def build_conv_layer(cfg, *args, **kwargs):
""" Build convolution layer
Args:
cfg (None or dict): cfg should contain:
type (str): identify conv layer type.
layer args: args needed to instantiate a conv layer.
Returns:
layer (nn.Module): created conv layer
"""
if cfg is None:
cfg_ = dict(type='Conv')
else:
assert isinstance(cfg, dict) and 'type' in cfg
cfg_ = cfg.copy()
layer_type = cfg_.pop('type')
if layer_type not in conv_cfg:
raise KeyError('Unrecognized norm type {}'.format(layer_type))
else:
conv_layer = conv_cfg[layer_type]
layer = conv_layer(*args, **kwargs, **cfg_)
return layer
class ConvModule(nn.Module):
"""A conv block that contains conv/norm/activation layers.
Args:
in_channels (int): Same as nn.Conv2d.
out_channels (int): Same as nn.Conv2d.
kernel_size (int or tuple[int]): Same as nn.Conv2d.
stride (int or tuple[int]): Same as nn.Conv2d.
padding (int or tuple[int]): Same as nn.Conv2d.
dilation (int or tuple[int]): Same as nn.Conv2d.
groups (int): Same as nn.Conv2d.
bias (bool or str): If specified as `auto`, it will be decided by the
norm_cfg. Bias will be set as True if norm_cfg is None, otherwise
False.
conv_cfg (dict): Config dict for convolution layer.
norm_cfg (dict): Config dict for normalization layer.
activation (str or None): Activation type, "ReLU" by default.
inplace (bool): Whether to use inplace mode for activation.
order (tuple[str]): The order of conv/norm/activation layers. It is a
sequence of "conv", "norm" and "act". Examples are
("conv", "norm", "act") and ("act", "conv", "norm").
"""
def __init__(self,
in_channels,
out_channels,
kernel_size,
stride=1,
padding=0,
dilation=1,
groups=1,
bias='auto',
conv_cfg=None,
norm_cfg=None,
activation='relu',
inplace=True,
order=('conv', 'norm', 'act')):
super(ConvModule, self).__init__()
assert conv_cfg is None or isinstance(conv_cfg, dict)
assert norm_cfg is None or isinstance(norm_cfg, dict)
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.activation = activation
self.inplace = inplace
self.order = order
assert isinstance(self.order, tuple) and len(self.order) == 3
assert set(order) == set(['conv', 'norm', 'act'])
self.with_norm = norm_cfg is not None
self.with_activatation = activation is not None
# if the conv layer is before a norm layer, bias is unnecessary.
if bias == 'auto':
bias = False if self.with_norm else True
self.with_bias = bias
if self.with_norm and self.with_bias:
warnings.warn('ConvModule has norm and bias at the same time')
# build convolution layer
self.conv = build_conv_layer(
conv_cfg,
in_channels,
out_channels,
kernel_size,
stride=stride,
padding=padding,
dilation=dilation,
groups=groups,
bias=bias)
# export the attributes of self.conv to a higher level for convenience
self.in_channels = self.conv.in_channels
self.out_channels = self.conv.out_channels
self.kernel_size = self.conv.kernel_size
self.stride = self.conv.stride
self.padding = self.conv.padding
self.dilation = self.conv.dilation
self.transposed = self.conv.transposed
self.output_padding = self.conv.output_padding
self.groups = self.conv.groups
# build normalization layers
if self.with_norm:
# norm layer is after conv layer
if order.index('norm') > order.index('conv'):
norm_channels = out_channels
else:
norm_channels = in_channels
self.norm_name, norm = build_norm_layer(norm_cfg, norm_channels)
self.add_module(self.norm_name, norm)
# build activation layer
if self.with_activatation:
# TODO: introduce `act_cfg` and supports more activation layers
if self.activation not in ['relu']:
raise ValueError('{} is currently not supported.'.format(
self.activation))
if self.activation == 'relu':
self.activate = nn.ReLU(inplace=inplace)
# Use msra init by default
self.init_weights()
@property
def norm(self):
return getattr(self, self.norm_name)
def init_weights(self):
nonlinearity = 'relu' if self.activation is None else self.activation
kaiming_init(self.conv, nonlinearity=nonlinearity)
if self.with_norm:
constant_init(self.norm, 1, bias=0)
def forward(self, x, activate=True, norm=True):
for layer in self.order:
if layer == 'conv':
x = self.conv(x)
elif layer == 'norm' and norm and self.with_norm:
x = self.norm(x)
elif layer == 'act' and activate and self.with_activatation:
x = self.activate(x)
return x
| 5,745
| 33.824242
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/utils/__init__.py
|
from .conv_module import ConvModule, build_conv_layer
from .conv_ws import ConvWS2d, conv_ws_2d
from .norm import build_norm_layer
from .scale import Scale
from .weight_init import (bias_init_with_prob, kaiming_init, normal_init,
uniform_init, xavier_init)
__all__ = [
'conv_ws_2d', 'ConvWS2d', 'build_conv_layer', 'ConvModule',
'build_norm_layer', 'xavier_init', 'normal_init', 'uniform_init',
'kaiming_init', 'bias_init_with_prob', 'Scale'
]
| 483
| 36.230769
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads_rotated/cascade_s2anet_head.py
|
from __future__ import division
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import (AnchorGeneratorRotated, anchor_target,
build_bbox_coder, delta2bbox_rotated, force_fp32,
images_to_levels, multi_apply, multiclass_nms_rotated)
from ...ops import DeformConv
from ..builder import build_loss
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
@HEADS.register_module
class CascadeS2ANetHead(nn.Module):
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=2,
with_align=True,
anchor_scales=[4],
anchor_ratios=[1.0],
anchor_strides=[8, 16, 32, 64, 128],
anchor_base_sizes=None,
target_means=(.0, .0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0, 1.0),
loss_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_bbox=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.0)):
super(CascadeS2ANetHead, self).__init__()
self.num_classes = num_classes
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.with_align = with_align
self.anchor_scales = anchor_scales
self.anchor_ratios = anchor_ratios
self.anchor_strides = anchor_strides
self.anchor_base_sizes = list(
anchor_strides) if anchor_base_sizes is None else anchor_base_sizes
self.target_means = target_means
self.target_stds = target_stds
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.sampling = loss_cls['type'] not in ['FocalLoss', 'GHMC']
if self.use_sigmoid_cls:
self.cls_out_channels = num_classes - 1
else:
self.cls_out_channels = num_classes
if self.cls_out_channels <= 0:
raise ValueError('num_classes={} is too small'.format(num_classes))
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.fp16_enabled = False
self.anchor_generators = []
for anchor_base in self.anchor_base_sizes:
self.anchor_generators.append(
AnchorGeneratorRotated(anchor_base, anchor_scales, anchor_ratios))
self._init_layers()
def _init_layers(self):
if self.with_align:
self.align_conv = AlignConv(
self.feat_channels, self.feat_channels, 3)
self.relu = nn.ReLU(inplace=True)
self.reg_convs = nn.ModuleList()
self.cls_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1))
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1))
self.bbox_cls = nn.Conv2d(
self.feat_channels, self.cls_out_channels, 3, padding=1)
self.bbox_reg = nn.Conv2d(self.feat_channels, 5, 3, padding=1)
def init_weights(self):
if self.with_align:
self.align_conv.init_weights()
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.bbox_reg, std=0.01)
normal_init(self.bbox_cls, std=0.01, bias=bias_cls)
def forward_single(self, x, anchors, stride):
# feature alignment
if self.with_align:
aligned_feat = self.align_conv(x, anchors, stride)
else:
aligned_feat = x
reg_feat = aligned_feat
for reg_conv in self.reg_convs:
reg_feat = reg_conv(reg_feat)
bbox_pred = self.bbox_reg(reg_feat)
cls_feat = aligned_feat
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
cls_score = self.bbox_cls(cls_feat)
return cls_score, bbox_pred
def forward(self, feats, anchor_list):
"""
The forward function should do two things:
1. anchor refinement by decoding the regressed box
2. feature alignment by alignment convolution
So it takes feats and anchors as input,
and outputs cls_score, bbox_pred and refined anchors
:param feats:
:param anchors:
:return:
"""
# Transform img level to feature level
num_imgs = len(anchor_list)
num_levels = len(anchor_list[0])
mlvl_anchor_list = [
[anchor_list[j][i] for j in range(num_imgs)]
for i in range(num_levels)
]
return multi_apply(self.forward_single, feats, mlvl_anchor_list, self.anchor_strides)
def get_init_anchors(self,
featmap_sizes,
img_metas,
device='cuda'):
"""Get anchors according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
img_metas (list[dict]): Image meta info.
device (torch.device | str): device for returned tensors
Returns:
tuple: anchors of each image, valid flags of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# anchors for one time
multi_level_anchors = []
for i in range(num_levels):
anchors = self.anchor_generators[i].grid_anchors(
featmap_sizes[i], self.anchor_strides[i], device=device)
multi_level_anchors.append(anchors)
anchor_list = [multi_level_anchors for _ in range(num_imgs)]
# for each image, we compute valid flags of multi level anchors
valid_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.anchor_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return anchor_list, valid_flag_list
def get_refine_anchors(self,
bbox_preds,
init_anchors,
featmap_sizes,
img_metas,
device='cuda'):
num_levels = len(featmap_sizes)
anchor_list = []
for img_id, img_meta in enumerate(img_metas):
mlvl_anchors_list = []
for i in range(num_levels):
# generate refined anchors
bbox_pred = bbox_preds[i].detach()
bbox_pred = bbox_pred[img_id].permute(1, 2, 0).reshape(-1, 5)
refined_anchor = delta2bbox_rotated(
init_anchors[img_id][i], bbox_pred,
self.target_means, self.target_stds, wh_ratio_clip=1e-6)
mlvl_anchors_list.append(refined_anchor)
anchor_list.append(mlvl_anchors_list)
valid_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.anchor_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return anchor_list, valid_flag_list
@force_fp32(apply_to=(
'cls_scores',
'bbox_preds'))
def loss(self,
cls_scores,
bbox_preds,
anchor_list,
valid_flag_list,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.anchor_generators)
device = cls_scores[0].device
# anchor number of multi levels
num_level_anchors = [anchors.size(0) for anchors in anchor_list[0]]
# concat all level anchors and flags to a single tensor
concat_anchor_list = []
for i in range(len(anchor_list)):
concat_anchor_list.append(torch.cat(anchor_list[i]))
all_anchor_list = images_to_levels(concat_anchor_list,
num_level_anchors)
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
anchor_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos + num_total_neg if self.sampling else num_total_pos)
losses_cls, losses_bbox = multi_apply(
self.loss_single,
cls_scores,
bbox_preds,
all_anchor_list,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg)
return dict(loss_cls=losses_cls, loss_bbox=losses_bbox)
def loss_single(self,
cls_score,
bbox_pred,
anchors,
labels,
label_weights,
bbox_targets,
bbox_weights,
num_total_samples,
cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
cls_score = cls_score.permute(
0, 2, 3, 1).reshape(-1, self.cls_out_channels)
loss_cls = self.loss_cls(
cls_score, labels, label_weights, avg_factor=num_total_samples)
# regression loss
bbox_targets = bbox_targets.reshape(-1, 5)
bbox_weights = bbox_weights.reshape(-1, 5)
bbox_pred = bbox_pred.permute(0, 2, 3, 1).reshape(-1, 5)
reg_decoded_bbox = cfg.get('reg_decoded_bbox', False)
if reg_decoded_bbox:
# When the regression loss (e.g. `IouLoss`, `GIouLoss`)
# is applied directly on the decoded bounding boxes, it
# decodes the already encoded coordinates to absolute format.
bbox_coder_cfg = cfg.get('bbox_coder', '')
if bbox_coder_cfg == '':
bbox_coder_cfg = dict(type='DeltaXYWHBBoxCoder')
bbox_coder = build_bbox_coder(bbox_coder_cfg)
anchors = anchors.reshape(-1, 5)
bbox_pred = bbox_coder.decode(anchors, bbox_pred)
loss_bbox = self.loss_bbox(
bbox_pred,
bbox_targets,
bbox_weights,
avg_factor=num_total_samples)
return loss_cls, loss_bbox
@force_fp32(apply_to=(
'cls_scores',
'bbox_preds'))
def get_bboxes(self,
cls_scores,
bbox_preds,
anchors_list,
valid_flag_list,
img_metas,
cfg,
rescale=False):
assert len(cls_scores) == len(bbox_preds)
num_levels = len(cls_scores)
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
bbox_preds[i][img_id].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
anchors_list[0], img_shape,
scale_factor, cfg, rescale)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_score_list,
bbox_pred_list,
mlvl_anchors,
img_shape,
scale_factor,
cfg,
rescale=False):
"""
Transform outputs for a single batch item into labeled boxes.
"""
assert len(cls_score_list) == len(bbox_pred_list) == len(mlvl_anchors)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, anchors in zip(cls_score_list,
bbox_pred_list, mlvl_anchors):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(
1, 2, 0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 5)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
# Get maximum scores for foreground classes.
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
anchors = anchors[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bboxes = delta2bbox_rotated(anchors, bbox_pred, self.target_means,
self.target_stds, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes[..., :4] /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
# Add a dummy background class to the front when using sigmoid
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
det_bboxes, det_labels = multiclass_nms_rotated(mlvl_bboxes,
mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
class AlignConv(nn.Module):
def __init__(self,
in_channels,
out_channels,
kernel_size=3,
deformable_groups=1):
super(AlignConv, self).__init__()
self.kernel_size = kernel_size
self.deform_conv = DeformConv(in_channels,
out_channels,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
deformable_groups=deformable_groups)
self.relu = nn.ReLU(inplace=True)
def init_weights(self):
normal_init(self.deform_conv, std=0.01)
@torch.no_grad()
def get_offset(self, anchors, featmap_size, stride):
dtype, device = anchors.dtype, anchors.device
feat_h, feat_w = featmap_size
pad = (self.kernel_size - 1) // 2
idx = torch.arange(-pad, pad + 1, dtype=dtype, device=device)
yy, xx = torch.meshgrid(idx, idx)
xx = xx.reshape(-1)
yy = yy.reshape(-1)
# get sampling locations of default conv
xc = torch.arange(0, feat_w, device=device, dtype=dtype)
yc = torch.arange(0, feat_h, device=device, dtype=dtype)
yc, xc = torch.meshgrid(yc, xc)
xc = xc.reshape(-1)
yc = yc.reshape(-1)
x_conv = xc[:, None] + xx
y_conv = yc[:, None] + yy
# get sampling locations of anchors
x_ctr, y_ctr, w, h, a = torch.unbind(anchors, dim=1)
x_ctr, y_ctr, w, h = x_ctr / stride, y_ctr / stride, w / stride, h / stride
cos, sin = torch.cos(a), torch.sin(a)
dw, dh = w / self.kernel_size, h / self.kernel_size
x, y = dw[:, None] * xx, dh[:, None] * yy
xr = cos[:, None] * x - sin[:, None] * y
yr = sin[:, None] * x + cos[:, None] * y
x_anchor, y_anchor = xr + x_ctr[:, None], yr + y_ctr[:, None]
# get offset filed
offset_x = x_anchor - x_conv
offset_y = y_anchor - y_conv
# x, y in anchors is opposite in image coordinates,
# so we stack them with y, x other than x, y
offset = torch.stack([offset_y, offset_x], dim=-1)
# NA,ks*ks*2
offset = offset.reshape(anchors.size(
0), -1).permute(1, 0).reshape(-1, feat_h, feat_w)
return offset
def forward(self, x, anchors, stride):
num_imgs, _, H, W = x.size()
offset_list = [
self.get_offset(anchors[i], (H, W), stride)
for i in range(num_imgs)
]
offset_tensor = torch.stack(offset_list, dim=0)
x = self.relu(self.deform_conv(x, offset_tensor))
return x
| 19,133
| 37.811359
| 93
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads_rotated/s2anet_head.py
|
from __future__ import division
import numpy as np
import torch
import torch.nn as nn
from mmcv.cnn import normal_init
from mmdet.core import (AnchorGeneratorRotated, anchor_target,
build_bbox_coder, delta2bbox_rotated, force_fp32,
images_to_levels, multi_apply, multiclass_nms_rotated)
from ...ops import DeformConv
from ...ops.orn import ORConv2d, RotationInvariantPooling
from ..builder import build_loss
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
@HEADS.register_module
class S2ANetHead(nn.Module):
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=2,
with_orconv=True,
anchor_scales=[4],
anchor_ratios=[1.0],
anchor_strides=[8, 16, 32, 64, 128],
anchor_base_sizes=None,
target_means=(.0, .0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0, 1.0),
loss_fam_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_fam_bbox=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.0),
loss_odm_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_odm_bbox=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.0)):
super(S2ANetHead, self).__init__()
self.num_classes = num_classes
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.with_orconv = with_orconv
self.anchor_scales = anchor_scales
self.anchor_ratios = anchor_ratios
self.anchor_strides = anchor_strides
self.anchor_base_sizes = list(
anchor_strides) if anchor_base_sizes is None else anchor_base_sizes
self.target_means = target_means
self.target_stds = target_stds
self.use_sigmoid_cls = loss_odm_cls.get('use_sigmoid', False)
self.sampling = loss_odm_cls['type'] not in ['FocalLoss', 'GHMC']
if self.use_sigmoid_cls:
self.cls_out_channels = num_classes - 1
else:
self.cls_out_channels = num_classes
if self.cls_out_channels <= 0:
raise ValueError('num_classes={} is too small'.format(num_classes))
self.loss_fam_cls = build_loss(loss_fam_cls)
self.loss_fam_bbox = build_loss(loss_fam_bbox)
self.loss_odm_cls = build_loss(loss_odm_cls)
self.loss_odm_bbox = build_loss(loss_odm_bbox)
self.fp16_enabled = False
self.anchor_generators = []
for anchor_base in self.anchor_base_sizes:
self.anchor_generators.append(
AnchorGeneratorRotated(anchor_base, anchor_scales, anchor_ratios))
# training mode
self.training = True
# anchor cache
self.base_anchors = dict()
self._init_layers()
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.fam_reg_convs = nn.ModuleList()
self.fam_cls_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.fam_reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1))
self.fam_cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1))
self.fam_reg = nn.Conv2d(self.feat_channels, 5, 1)
self.fam_cls = nn.Conv2d(self.feat_channels, self.cls_out_channels, 1)
self.align_conv = AlignConv(
self.feat_channels, self.feat_channels, kernel_size=3)
if self.with_orconv:
self.or_conv = ORConv2d(self.feat_channels, int(
self.feat_channels / 8), kernel_size=3, padding=1, arf_config=(1, 8))
else:
self.or_conv = nn.Conv2d(
self.feat_channels, self.feat_channels, 3, padding=1)
self.or_pool = RotationInvariantPooling(256, 8)
self.odm_reg_convs = nn.ModuleList()
self.odm_cls_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = int(self.feat_channels /
8) if i == 0 and self.with_orconv else self.feat_channels
self.odm_reg_convs.append(
ConvModule(
self.feat_channels,
self.feat_channels,
3,
stride=1,
padding=1))
self.odm_cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1))
self.odm_cls = nn.Conv2d(
self.feat_channels, self.cls_out_channels, 3, padding=1)
self.odm_reg = nn.Conv2d(self.feat_channels, 5, 3, padding=1)
def init_weights(self):
for m in self.fam_reg_convs:
normal_init(m.conv, std=0.01)
for m in self.fam_cls_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.fam_reg, std=0.01)
normal_init(self.fam_cls, std=0.01, bias=bias_cls)
self.align_conv.init_weights()
normal_init(self.or_conv, std=0.01)
for m in self.odm_reg_convs:
normal_init(m.conv, std=0.01)
for m in self.odm_cls_convs:
normal_init(m.conv, std=0.01)
normal_init(self.odm_cls, std=0.01, bias=bias_cls)
normal_init(self.odm_reg, std=0.01)
def forward_single(self, x, stride):
fam_reg_feat = x
for fam_reg_conv in self.fam_reg_convs:
fam_reg_feat = fam_reg_conv(fam_reg_feat)
fam_bbox_pred = self.fam_reg(fam_reg_feat)
# only forward during training
if self.training:
fam_cls_feat = x
for fam_cls_conv in self.fam_cls_convs:
fam_cls_feat = fam_cls_conv(fam_cls_feat)
fam_cls_score = self.fam_cls(fam_cls_feat)
else:
fam_cls_score = None
num_level = self.anchor_strides.index(stride)
featmap_size = fam_bbox_pred.shape[-2:]
if (num_level, featmap_size) in self.base_anchors:
init_anchors = self.base_anchors[(num_level, featmap_size)]
else:
device = fam_bbox_pred.device
init_anchors = self.anchor_generators[num_level].grid_anchors(
featmap_size, self.anchor_strides[num_level], device=device)
self.base_anchors[(num_level, featmap_size)] = init_anchors
refine_anchor = bbox_decode(
fam_bbox_pred.detach(),
init_anchors,
self.target_means,
self.target_stds)
align_feat = self.align_conv(x, refine_anchor.clone(), stride)
or_feat = self.or_conv(align_feat)
odm_reg_feat = or_feat
if self.with_orconv:
odm_cls_feat = self.or_pool(or_feat)
else:
odm_cls_feat = or_feat
for odm_reg_conv in self.odm_reg_convs:
odm_reg_feat = odm_reg_conv(odm_reg_feat)
for odm_cls_conv in self.odm_cls_convs:
odm_cls_feat = odm_cls_conv(odm_cls_feat)
odm_cls_score = self.odm_cls(odm_cls_feat)
odm_bbox_pred = self.odm_reg(odm_reg_feat)
return fam_cls_score, fam_bbox_pred, refine_anchor, odm_cls_score, odm_bbox_pred
def forward(self, feats):
return multi_apply(self.forward_single, feats, self.anchor_strides)
def get_init_anchors(self,
featmap_sizes,
img_metas,
device='cuda'):
"""Get anchors according to feature map sizes.
Args:
featmap_sizes (list[tuple]): Multi-level feature map sizes.
img_metas (list[dict]): Image meta info.
device (torch.device | str): device for returned tensors
Returns:
tuple: anchors of each image, valid flags of each image
"""
num_imgs = len(img_metas)
num_levels = len(featmap_sizes)
# since feature map sizes of all images are the same, we only compute
# anchors for one time
multi_level_anchors = []
for i in range(num_levels):
anchors = self.anchor_generators[i].grid_anchors(
featmap_sizes[i], self.anchor_strides[i], device=device)
multi_level_anchors.append(anchors)
anchor_list = [multi_level_anchors for _ in range(num_imgs)]
# for each image, we compute valid flags of multi level anchors
valid_flag_list = []
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.anchor_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return anchor_list, valid_flag_list
def get_refine_anchors(self,
featmap_sizes,
refine_anchors,
img_metas,
is_train=True,
device='cuda'):
num_levels = len(featmap_sizes)
refine_anchors_list = []
for img_id, img_meta in enumerate(img_metas):
mlvl_refine_anchors = []
for i in range(num_levels):
refine_anchor = refine_anchors[i][img_id].reshape(-1, 5)
mlvl_refine_anchors.append(refine_anchor)
refine_anchors_list.append(mlvl_refine_anchors)
valid_flag_list = []
if is_train:
for img_id, img_meta in enumerate(img_metas):
multi_level_flags = []
for i in range(num_levels):
anchor_stride = self.anchor_strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w, _ = img_meta['pad_shape']
valid_feat_h = min(int(np.ceil(h / anchor_stride)), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride)), feat_w)
flags = self.anchor_generators[i].valid_flags(
(feat_h, feat_w), (valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
valid_flag_list.append(multi_level_flags)
return refine_anchors_list, valid_flag_list
@force_fp32(apply_to=(
'fam_cls_scores',
'fam_bbox_preds',
'odm_cls_scores',
'odm_bbox_preds'))
def loss(self,
fam_cls_scores,
fam_bbox_preds,
refine_anchors,
odm_cls_scores,
odm_bbox_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in odm_cls_scores]
assert len(featmap_sizes) == len(self.anchor_generators)
device = odm_cls_scores[0].device
anchor_list, valid_flag_list = self.get_init_anchors(
featmap_sizes, img_metas, device=device)
# anchor number of multi levels
num_level_anchors = [anchors.size(0) for anchors in anchor_list[0]]
# concat all level anchors and flags to a single tensor
concat_anchor_list = []
for i in range(len(anchor_list)):
concat_anchor_list.append(torch.cat(anchor_list[i]))
all_anchor_list = images_to_levels(concat_anchor_list,
num_level_anchors)
# Feature Alignment Module
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
anchor_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg.fam_cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos + num_total_neg if self.sampling else num_total_pos)
losses_fam_cls, losses_fam_bbox = multi_apply(
self.loss_fam_single,
fam_cls_scores,
fam_bbox_preds,
all_anchor_list,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg.fam_cfg)
# Oriented Detection Module targets
refine_anchors_list, valid_flag_list = self.get_refine_anchors(
featmap_sizes, refine_anchors, img_metas, device=device)
# anchor number of multi levels
num_level_anchors = [anchors.size(0)
for anchors in refine_anchors_list[0]]
# concat all level anchors and flags to a single tensor
concat_anchor_list = []
for i in range(len(refine_anchors_list)):
concat_anchor_list.append(torch.cat(refine_anchors_list[i]))
all_anchor_list = images_to_levels(concat_anchor_list,
num_level_anchors)
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
refine_anchors_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg.odm_cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos + num_total_neg if self.sampling else num_total_pos)
losses_odm_cls, losses_odm_bbox = multi_apply(
self.loss_odm_single,
odm_cls_scores,
odm_bbox_preds,
all_anchor_list,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg.odm_cfg)
return dict(loss_fam_cls=losses_fam_cls,
loss_fam_bbox=losses_fam_bbox,
loss_odm_cls=losses_odm_cls,
loss_odm_bbox=losses_odm_bbox)
def loss_fam_single(self,
fam_cls_score,
fam_bbox_pred,
anchors,
labels,
label_weights,
bbox_targets,
bbox_weights,
num_total_samples,
cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
fam_cls_score = fam_cls_score.permute(
0, 2, 3, 1).reshape(-1, self.cls_out_channels)
loss_fam_cls = self.loss_fam_cls(
fam_cls_score, labels, label_weights, avg_factor=num_total_samples)
# regression loss
bbox_targets = bbox_targets.reshape(-1, 5)
bbox_weights = bbox_weights.reshape(-1, 5)
fam_bbox_pred = fam_bbox_pred.permute(0, 2, 3, 1).reshape(-1, 5)
reg_decoded_bbox = cfg.get('reg_decoded_bbox', False)
if reg_decoded_bbox:
# When the regression loss (e.g. `IouLoss`, `GIouLoss`)
# is applied directly on the decoded bounding boxes, it
# decodes the already encoded coordinates to absolute format.
bbox_coder_cfg = cfg.get('bbox_coder', '')
if bbox_coder_cfg == '':
bbox_coder_cfg = dict(type='DeltaXYWHBBoxCoder')
bbox_coder = build_bbox_coder(bbox_coder_cfg)
anchors = anchors.reshape(-1, 5)
fam_bbox_pred = bbox_coder.decode(anchors, fam_bbox_pred)
loss_fam_bbox = self.loss_fam_bbox(
fam_bbox_pred,
bbox_targets,
bbox_weights,
avg_factor=num_total_samples)
return loss_fam_cls, loss_fam_bbox
def loss_odm_single(self,
odm_cls_score,
odm_bbox_pred,
anchors,
labels,
label_weights,
bbox_targets,
bbox_weights,
num_total_samples,
cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
odm_cls_score = odm_cls_score.permute(0, 2, 3,
1).reshape(-1, self.cls_out_channels)
loss_odm_cls = self.loss_odm_cls(
odm_cls_score, labels, label_weights, avg_factor=num_total_samples)
# regression loss
bbox_targets = bbox_targets.reshape(-1, 5)
bbox_weights = bbox_weights.reshape(-1, 5)
odm_bbox_pred = odm_bbox_pred.permute(0, 2, 3, 1).reshape(-1, 5)
reg_decoded_bbox = cfg.get('reg_decoded_bbox', False)
if reg_decoded_bbox:
# When the regression loss (e.g. `IouLoss`, `GIouLoss`)
# is applied directly on the decoded bounding boxes, it
# decodes the already encoded coordinates to absolute format.
bbox_coder_cfg = cfg.get('bbox_coder', '')
if bbox_coder_cfg == '':
bbox_coder_cfg = dict(type='DeltaXYWHBBoxCoder')
bbox_coder = build_bbox_coder(bbox_coder_cfg)
anchors = anchors.reshape(-1, 5)
odm_bbox_pred = bbox_coder.decode(anchors, odm_bbox_pred)
loss_odm_bbox = self.loss_odm_bbox(
odm_bbox_pred,
bbox_targets,
bbox_weights,
avg_factor=num_total_samples)
return loss_odm_cls, loss_odm_bbox
@force_fp32(apply_to=(
'fam_cls_scores',
'fam_bbox_preds',
'odm_cls_scores',
'odm_bbox_preds'))
def get_bboxes(self,
fam_cls_scores,
fam_bbox_preds,
refine_anchors,
odm_cls_scores,
odm_bbox_preds,
img_metas,
cfg,
rescale=False):
assert len(odm_cls_scores) == len(odm_bbox_preds)
featmap_sizes = [featmap.size()[-2:] for featmap in odm_cls_scores]
num_levels = len(odm_cls_scores)
device = odm_cls_scores[0].device
refine_anchors = self.get_refine_anchors(
featmap_sizes, refine_anchors, img_metas, is_train=False, device=device)
result_list = []
for img_id in range(len(img_metas)):
cls_score_list = [
odm_cls_scores[i][img_id].detach() for i in range(num_levels)
]
bbox_pred_list = [
odm_bbox_preds[i][img_id].detach() for i in range(num_levels)
]
img_shape = img_metas[img_id]['img_shape']
scale_factor = img_metas[img_id]['scale_factor']
proposals = self.get_bboxes_single(cls_score_list, bbox_pred_list,
refine_anchors[0][0], img_shape,
scale_factor, cfg, rescale)
result_list.append(proposals)
return result_list
def get_bboxes_single(self,
cls_score_list,
bbox_pred_list,
mlvl_anchors,
img_shape,
scale_factor,
cfg,
rescale=False):
"""
Transform outputs for a single batch item into labeled boxes.
"""
assert len(cls_score_list) == len(bbox_pred_list) == len(mlvl_anchors)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, anchors in zip(cls_score_list,
bbox_pred_list, mlvl_anchors):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(
1, 2, 0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 5)
# anchors = rect2rbox(anchors)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
# Get maximum scores for foreground classes.
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
anchors = anchors[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bboxes = delta2bbox_rotated(anchors, bbox_pred, self.target_means,
self.target_stds, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes[..., :4] /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
# Add a dummy background class to the front when using sigmoid
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
det_bboxes, det_labels = multiclass_nms_rotated(mlvl_bboxes,
mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
def bbox_decode(
bbox_preds,
anchors,
means=[0, 0, 0, 0, 0],
stds=[1, 1, 1, 1, 1]):
"""
Decode bboxes from deltas
:param bbox_preds: [N,5,H,W]
:param anchors: [H*W,5]
:param means: mean value to decode bbox
:param stds: std value to decode bbox
:return: [N,H,W,5]
"""
num_imgs, _, H, W = bbox_preds.shape
bboxes_list = []
for img_id in range(num_imgs):
bbox_pred = bbox_preds[img_id]
# bbox_pred.shape=[5,H,W]
bbox_delta = bbox_pred.permute(1, 2, 0).reshape(-1, 5)
bboxes = delta2bbox_rotated(
anchors, bbox_delta, means, stds, wh_ratio_clip=1e-6)
bboxes = bboxes.reshape(H, W, 5)
bboxes_list.append(bboxes)
return torch.stack(bboxes_list, dim=0)
class AlignConv(nn.Module):
def __init__(self,
in_channels,
out_channels,
kernel_size=3,
deformable_groups=1):
super(AlignConv, self).__init__()
self.kernel_size = kernel_size
self.deform_conv = DeformConv(in_channels,
out_channels,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
deformable_groups=deformable_groups)
self.relu = nn.ReLU(inplace=True)
def init_weights(self):
normal_init(self.deform_conv, std=0.01)
@torch.no_grad()
def get_offset(self, anchors, featmap_size, stride):
dtype, device = anchors.dtype, anchors.device
feat_h, feat_w = featmap_size
pad = (self.kernel_size - 1) // 2
idx = torch.arange(-pad, pad + 1, dtype=dtype, device=device)
yy, xx = torch.meshgrid(idx, idx)
xx = xx.reshape(-1)
yy = yy.reshape(-1)
# get sampling locations of default conv
xc = torch.arange(0, feat_w, device=device, dtype=dtype)
yc = torch.arange(0, feat_h, device=device, dtype=dtype)
yc, xc = torch.meshgrid(yc, xc)
xc = xc.reshape(-1)
yc = yc.reshape(-1)
x_conv = xc[:, None] + xx
y_conv = yc[:, None] + yy
# get sampling locations of anchors
x_ctr, y_ctr, w, h, a = torch.unbind(anchors, dim=1)
x_ctr, y_ctr, w, h = x_ctr / stride, y_ctr / stride, w / stride, h / stride
cos, sin = torch.cos(a), torch.sin(a)
dw, dh = w / self.kernel_size, h / self.kernel_size
x, y = dw[:, None] * xx, dh[:, None] * yy
xr = cos[:, None] * x - sin[:, None] * y
yr = sin[:, None] * x + cos[:, None] * y
x_anchor, y_anchor = xr + x_ctr[:, None], yr + y_ctr[:, None]
# get offset filed
offset_x = x_anchor - x_conv
offset_y = y_anchor - y_conv
# x, y in anchors is opposite in image coordinates,
# so we stack them with y, x other than x, y
offset = torch.stack([offset_y, offset_x], dim=-1)
# NA,ks*ks*2
offset = offset.reshape(anchors.size(
0), -1).permute(1, 0).reshape(-1, feat_h, feat_w)
return offset
def forward(self, x, anchors, stride):
num_imgs, H, W = anchors.shape[:3]
offset_list = [
self.get_offset(anchors[i].reshape(-1, 5), (H, W), stride)
for i in range(num_imgs)
]
offset_tensor = torch.stack(offset_list, dim=0)
x = self.relu(self.deform_conv(x, offset_tensor))
return x
| 27,099
| 38.911635
| 88
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads_rotated/anchor_head_rotated.py
|
from __future__ import division
import torch
import torch.nn as nn
from mmdet.core import (AnchorGeneratorRotated, anchor_target,
delta2bbox_rotated, force_fp32, multi_apply,
multiclass_nms_rotated, images_to_levels, build_bbox_coder)
from ..anchor_heads import AnchorHead
from ..registry import HEADS
@HEADS.register_module
class AnchorHeadRotated(AnchorHead):
def __init__(self, *args, anchor_angles=[0., ], **kargs):
super(AnchorHeadRotated, self).__init__(*args, **kargs)
self.anchor_angles = anchor_angles
self.anchor_generators = []
for anchor_base in self.anchor_base_sizes:
self.anchor_generators.append(
AnchorGeneratorRotated(
anchor_base, self.anchor_scales, self.anchor_ratios, angles=anchor_angles))
self.num_anchors = len(self.anchor_ratios) * \
len(self.anchor_scales) * len(self.anchor_angles)
self._init_layers()
def _init_layers(self):
self.conv_cls = nn.Conv2d(self.in_channels,
self.num_anchors * self.cls_out_channels, 1)
self.conv_reg = nn.Conv2d(self.in_channels, self.num_anchors * 5, 1)
def loss_single(self, cls_score, bbox_pred, anchors, labels, label_weights,
bbox_targets, bbox_weights, num_total_samples, cfg):
# classification loss
labels = labels.reshape(-1)
label_weights = label_weights.reshape(-1)
cls_score = cls_score.permute(
0, 2, 3, 1).reshape(-1, self.cls_out_channels)
loss_cls = self.loss_cls(
cls_score, labels, label_weights, avg_factor=num_total_samples)
# regression loss
bbox_targets = bbox_targets.reshape(-1, 5)
bbox_weights = bbox_weights.reshape(-1, 5)
bbox_pred = bbox_pred.permute(0, 2, 3, 1).reshape(-1, 5)
reg_decoded_bbox = cfg.get('reg_decoded_bbox', False)
if reg_decoded_bbox:
# When the regression loss (e.g. `IouLoss`, `GIouLoss`)
# is applied directly on the decoded bounding boxes, it
# decodes the already encoded coordinates to absolute format.
bbox_coder_cfg = cfg.get('bbox_coder', '')
if bbox_coder_cfg == '':
bbox_coder_cfg = dict(type='DeltaXYWHBBoxCoder')
bbox_coder = build_bbox_coder(bbox_coder_cfg)
anchors = anchors.reshape(-1, 5)
bbox_pred = bbox_coder.decode(anchors, bbox_pred)
loss_bbox = self.loss_bbox(
bbox_pred,
bbox_targets,
bbox_weights,
avg_factor=num_total_samples)
return loss_cls, loss_bbox
@force_fp32(apply_to=('cls_scores', 'bbox_preds'))
def loss(self,
cls_scores,
bbox_preds,
gt_bboxes,
gt_labels,
img_metas,
cfg,
gt_bboxes_ignore=None):
featmap_sizes = [featmap.size()[-2:] for featmap in cls_scores]
assert len(featmap_sizes) == len(self.anchor_generators)
device = cls_scores[0].device
anchor_list, valid_flag_list = self.get_anchors(
featmap_sizes, img_metas, device=device)
# anchor number of multi levels
num_level_anchors = [anchors.size(0) for anchors in anchor_list[0]]
# concat all level anchors and flags to a single tensor
concat_anchor_list = []
for i in range(len(anchor_list)):
concat_anchor_list.append(torch.cat(anchor_list[i]))
all_anchor_list = images_to_levels(concat_anchor_list,
num_level_anchors)
label_channels = self.cls_out_channels if self.use_sigmoid_cls else 1
cls_reg_targets = anchor_target(
anchor_list,
valid_flag_list,
gt_bboxes,
img_metas,
self.target_means,
self.target_stds,
cfg,
gt_bboxes_ignore_list=gt_bboxes_ignore,
gt_labels_list=gt_labels,
label_channels=label_channels,
sampling=self.sampling)
if cls_reg_targets is None:
return None
(labels_list, label_weights_list, bbox_targets_list, bbox_weights_list,
num_total_pos, num_total_neg) = cls_reg_targets
num_total_samples = (
num_total_pos + num_total_neg if self.sampling else num_total_pos)
losses_cls, losses_bbox = multi_apply(
self.loss_single,
cls_scores,
bbox_preds,
all_anchor_list,
labels_list,
label_weights_list,
bbox_targets_list,
bbox_weights_list,
num_total_samples=num_total_samples,
cfg=cfg)
return dict(loss_cls=losses_cls, loss_bbox=losses_bbox)
def get_bboxes_single(self,
cls_score_list,
bbox_pred_list,
mlvl_anchors,
img_shape,
scale_factor,
cfg,
rescale=False):
"""
Transform outputs for a single batch item into labeled boxes.
"""
assert len(cls_score_list) == len(bbox_pred_list) == len(mlvl_anchors)
mlvl_bboxes = []
mlvl_scores = []
for cls_score, bbox_pred, anchors in zip(cls_score_list,
bbox_pred_list, mlvl_anchors):
assert cls_score.size()[-2:] == bbox_pred.size()[-2:]
cls_score = cls_score.permute(1, 2,
0).reshape(-1, self.cls_out_channels)
if self.use_sigmoid_cls:
scores = cls_score.sigmoid()
else:
scores = cls_score.softmax(-1)
bbox_pred = bbox_pred.permute(1, 2, 0).reshape(-1, 5)
nms_pre = cfg.get('nms_pre', -1)
if nms_pre > 0 and scores.shape[0] > nms_pre:
# Get maximum scores for foreground classes.
if self.use_sigmoid_cls:
max_scores, _ = scores.max(dim=1)
else:
max_scores, _ = scores[:, 1:].max(dim=1)
_, topk_inds = max_scores.topk(nms_pre)
anchors = anchors[topk_inds, :]
bbox_pred = bbox_pred[topk_inds, :]
scores = scores[topk_inds, :]
bboxes = delta2bbox_rotated(anchors, bbox_pred, self.target_means,
self.target_stds, img_shape)
mlvl_bboxes.append(bboxes)
mlvl_scores.append(scores)
mlvl_bboxes = torch.cat(mlvl_bboxes)
if rescale:
mlvl_bboxes[..., :4] /= mlvl_bboxes.new_tensor(scale_factor)
mlvl_scores = torch.cat(mlvl_scores)
if self.use_sigmoid_cls:
# Add a dummy background class to the front when using sigmoid
padding = mlvl_scores.new_zeros(mlvl_scores.shape[0], 1)
mlvl_scores = torch.cat([padding, mlvl_scores], dim=1)
det_bboxes, det_labels = multiclass_nms_rotated(mlvl_bboxes, mlvl_scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
| 7,452
| 40.636872
| 95
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads_rotated/__init__.py
|
from .anchor_head_rotated import AnchorHeadRotated
from .cascade_s2anet_head import CascadeS2ANetHead
from .retina_head_rotated import RetinaHeadRotated
from .s2anet_head import S2ANetHead
__all__ = [
'AnchorHeadRotated', 'RetinaHeadRotated', 'S2ANetHead', 'CascadeS2ANetHead'
]
| 284
| 30.666667
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/anchor_heads_rotated/retina_head_rotated.py
|
import numpy as np
import torch.nn as nn
from mmcv.cnn import normal_init
from ..registry import HEADS
from ..utils import ConvModule, bias_init_with_prob
from .anchor_head_rotated import AnchorHeadRotated
@HEADS.register_module
class RetinaHeadRotated(AnchorHeadRotated):
def __init__(self,
num_classes,
in_channels,
stacked_convs=4,
octave_base_scale=4,
scales_per_octave=3,
anchor_angles=[0.,],
conv_cfg=None,
norm_cfg=None,
**kwargs):
self.stacked_convs = stacked_convs
self.octave_base_scale = octave_base_scale
self.scales_per_octave = scales_per_octave
self.anchor_angles = anchor_angles
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
octave_scales = np.array(
[2**(i / scales_per_octave) for i in range(scales_per_octave)])
anchor_scales = octave_scales * octave_base_scale
super(RetinaHeadRotated, self).__init__(
num_classes, in_channels, anchor_scales=anchor_scales, anchor_angles=anchor_angles, **kwargs)
def _init_layers(self):
self.relu = nn.ReLU(inplace=True)
self.cls_convs = nn.ModuleList()
self.reg_convs = nn.ModuleList()
for i in range(self.stacked_convs):
chn = self.in_channels if i == 0 else self.feat_channels
self.cls_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.reg_convs.append(
ConvModule(
chn,
self.feat_channels,
3,
stride=1,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
self.retina_cls = nn.Conv2d(
self.feat_channels,
self.num_anchors * self.cls_out_channels,
3,
padding=1)
self.retina_reg = nn.Conv2d(
self.feat_channels, self.num_anchors * 5, 3, padding=1)
def init_weights(self):
for m in self.cls_convs:
normal_init(m.conv, std=0.01)
for m in self.reg_convs:
normal_init(m.conv, std=0.01)
bias_cls = bias_init_with_prob(0.01)
normal_init(self.retina_cls, std=0.01, bias=bias_cls)
normal_init(self.retina_reg, std=0.01)
def forward_single(self, x):
cls_feat = x
reg_feat = x
for cls_conv in self.cls_convs:
cls_feat = cls_conv(cls_feat)
for reg_conv in self.reg_convs:
reg_feat = reg_conv(reg_feat)
cls_score = self.retina_cls(cls_feat)
bbox_pred = self.retina_reg(reg_feat)
return cls_score, bbox_pred
| 3,012
| 34.034884
| 105
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads_rotated/bbox_head_rotated.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.nn.modules.utils import _pair
from mmdet.core import (auto_fp16, bbox_target_rotated, delta2bbox_rotated, force_fp32,
multiclass_nms_rotated, bbox_to_rotated_box, rotated_box_to_poly, poly_to_rotated_box)
from ..builder import build_loss
from ..losses import accuracy
from ..registry import HEADS
@HEADS.register_module
class BBoxHeadRotated(nn.Module):
"""Simplest RoI head, with only two fc layers for classification and
regression respectively"""
def __init__(self,
with_avg_pool=False,
with_cls=True,
with_reg=True,
roi_feat_size=7,
in_channels=256,
num_classes=81,
target_means=[0., 0., 0., 0., 0.],
target_stds=[0.1, 0.1, 0.2, 0.2, 0.1],
reg_class_agnostic=False,
loss_cls=dict(
type='CrossEntropyLoss',
use_sigmoid=False,
loss_weight=1.0),
loss_bbox=dict(
type='SmoothL1Loss', beta=1.0, loss_weight=1.0)):
super(BBoxHeadRotated, self).__init__()
assert with_cls or with_reg
self.with_avg_pool = with_avg_pool
self.with_cls = with_cls
self.with_reg = with_reg
self.roi_feat_size = _pair(roi_feat_size)
self.roi_feat_area = self.roi_feat_size[0] * self.roi_feat_size[1]
self.in_channels = in_channels
self.num_classes = num_classes
self.target_means = target_means
self.target_stds = target_stds
self.reg_class_agnostic = reg_class_agnostic
self.fp16_enabled = False
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
in_channels = self.in_channels
if self.with_avg_pool:
self.avg_pool = nn.AvgPool2d(self.roi_feat_size)
else:
in_channels *= self.roi_feat_area
if self.with_cls:
self.fc_cls = nn.Linear(in_channels, num_classes)
if self.with_reg:
out_dim_reg = 5 if reg_class_agnostic else 5 * num_classes
self.fc_reg = nn.Linear(in_channels, out_dim_reg)
self.debug_imgs = None
def init_weights(self):
if self.with_cls:
nn.init.normal_(self.fc_cls.weight, 0, 0.01)
nn.init.constant_(self.fc_cls.bias, 0)
if self.with_reg:
nn.init.normal_(self.fc_reg.weight, 0, 0.001)
nn.init.constant_(self.fc_reg.bias, 0)
@auto_fp16()
def forward(self, x):
if self.with_avg_pool:
x = self.avg_pool(x)
x = x.view(x.size(0), -1)
cls_score = self.fc_cls(x) if self.with_cls else None
bbox_pred = self.fc_reg(x) if self.with_reg else None
return cls_score, bbox_pred
def get_target(self, sampling_results, gt_bboxes, gt_labels,
rcnn_train_cfg):
pos_proposals = [res.pos_bboxes for res in sampling_results]
neg_proposals = [res.neg_bboxes for res in sampling_results]
pos_gt_bboxes = [res.pos_gt_bboxes for res in sampling_results]
pos_gt_labels = [res.pos_gt_labels for res in sampling_results]
reg_classes = 1 if self.reg_class_agnostic else self.num_classes
cls_reg_targets = bbox_target_rotated(
pos_proposals,
neg_proposals,
pos_gt_bboxes,
pos_gt_labels,
rcnn_train_cfg,
reg_classes,
target_means=self.target_means,
target_stds=self.target_stds)
return cls_reg_targets
@force_fp32(apply_to=('cls_score', 'bbox_pred'))
def loss(self,
cls_score,
bbox_pred,
labels,
label_weights,
bbox_targets,
bbox_weights,
reduction_override=None):
losses = dict()
if cls_score is not None:
avg_factor = max(torch.sum(label_weights > 0).float().item(), 1.)
losses['loss_cls'] = self.loss_cls(
cls_score,
labels,
label_weights,
avg_factor=avg_factor,
reduction_override=reduction_override)
losses['acc'] = accuracy(cls_score, labels)
if bbox_pred is not None:
pos_inds = labels > 0
if self.reg_class_agnostic:
pos_bbox_pred = bbox_pred.view(bbox_pred.size(0), 5)[pos_inds]
else:
pos_bbox_pred = bbox_pred.view(bbox_pred.size(0), -1,
5)[pos_inds, labels[pos_inds]]
losses['loss_bbox'] = self.loss_bbox(
pos_bbox_pred,
bbox_targets[pos_inds],
bbox_weights[pos_inds],
avg_factor=bbox_targets.size(0),
reduction_override=reduction_override)
return losses
@force_fp32(apply_to=('cls_score', 'bbox_pred'))
def get_det_bboxes(self,
rois,
cls_score,
bbox_pred,
img_shape,
scale_factor,
rescale=False,
cfg=None):
if isinstance(cls_score, list):
cls_score = sum(cls_score) / float(len(cls_score))
scores = F.softmax(cls_score, dim=1) if cls_score is not None else None
rotated_rois = bbox_to_rotated_box(rois[:, 1:])
if bbox_pred is not None:
bboxes = delta2bbox_rotated(rotated_rois, bbox_pred, self.target_means,
self.target_stds, img_shape)
else:
bboxes = rotated_rois.clone()
polys = rotated_box_to_poly(bboxes)
if img_shape is not None:
polys[:, 0::2].clamp_(min=0, max=img_shape[1] - 1)
polys[:, 1::2].clamp_(min=0, max=img_shape[0] - 1)
bboxes = poly_to_rotated_box(polys)
if rescale:
if isinstance(scale_factor, float):
bboxes[..., :4] /= scale_factor
else:
bboxes[..., :4] /= torch.from_numpy(scale_factor).to(bboxes.device)
if cfg is None:
return bboxes, scores
else:
det_bboxes, det_labels = multiclass_nms_rotated(bboxes, scores,
cfg.score_thr, cfg.nms,
cfg.max_per_img)
return det_bboxes, det_labels
@force_fp32(apply_to=('bbox_preds',))
def refine_bboxes(self, rois, labels, bbox_preds, pos_is_gts, img_metas):
"""Refine bboxes during training.
Args:
rois (Tensor): Shape (n*bs, 6), where n is image number per GPU,
and bs is the sampled RoIs per image.
labels (Tensor): Shape (n*bs, ).
bbox_preds (Tensor): Shape (n*bs, 5) or (n*bs, 5*#class).
pos_is_gts (list[Tensor]): Flags indicating if each positive bbox
is a gt bbox.
img_metas (list[dict]): Meta info of each image.
Returns:
list[Tensor]: Refined bboxes of each image in a mini-batch.
"""
img_ids = rois[:, 0].long().unique(sorted=True)
assert img_ids.numel() == len(img_metas)
bboxes_list = []
for i in range(len(img_metas)):
inds = torch.nonzero(rois[:, 0] == i).squeeze()
num_rois = inds.numel()
bboxes_ = rois[inds, 1:]
label_ = labels[inds]
bbox_pred_ = bbox_preds[inds]
img_meta_ = img_metas[i]
pos_is_gts_ = pos_is_gts[i]
bboxes = self.regress_by_class(bboxes_, label_, bbox_pred_,
img_meta_)
# filter gt bboxes
pos_keep = 1 - pos_is_gts_
keep_inds = pos_is_gts_.new_ones(num_rois)
keep_inds[:len(pos_is_gts_)] = pos_keep
bboxes_list.append(bboxes[keep_inds])
return bboxes_list
@force_fp32(apply_to=('bbox_pred',))
def regress_by_class(self, rois, label, bbox_pred, img_meta):
"""Regress the bbox for the predicted class. Used in Cascade R-CNN.
Args:
rois (Tensor): shape (n, 5) or (n, 6)
label (Tensor): shape (n, )
bbox_pred (Tensor): shape (n, 5*(#class+1)) or (n, 5)
img_meta (dict): Image meta info.
Returns:
Tensor: Regressed bboxes, the same shape as input rois.
"""
assert rois.size(1) == 5 or rois.size(1) == 6
if not self.reg_class_agnostic:
label = label * 5
inds = torch.stack((label, label + 1, label + 2, label + 3, label + 4), 1)
bbox_pred = torch.gather(bbox_pred, 1, inds)
assert bbox_pred.size(1) == 5
if rois.size(1) == 5:
new_rois = delta2bbox_rotated(rois, bbox_pred, self.target_means,
self.target_stds, img_meta['img_shape'])
else:
bboxes = delta2bbox_rotated(rois[:, 1:], bbox_pred, self.target_means,
self.target_stds, img_meta['img_shape'])
new_rois = torch.cat((rois[:, [0]], bboxes), dim=1)
return new_rois
| 9,476
| 38
| 110
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads_rotated/convfc_bbox_head_rotated.py
|
import torch.nn as nn
from .bbox_head_rotated import BBoxHeadRotated
from ..registry import HEADS
from ..utils import ConvModule
@HEADS.register_module
class ConvFCBBoxHeadRotated(BBoxHeadRotated):
r"""More general bbox head, with shared conv and fc layers and two optional
separated branches.
/-> cls convs -> cls fcs -> cls
shared convs -> shared fcs
\-> reg convs -> reg fcs -> reg
""" # noqa: W605
def __init__(self,
num_shared_convs=0,
num_shared_fcs=0,
num_cls_convs=0,
num_cls_fcs=0,
num_reg_convs=0,
num_reg_fcs=0,
conv_out_channels=256,
fc_out_channels=1024,
conv_cfg=None,
norm_cfg=None,
*args,
**kwargs):
super(ConvFCBBoxHeadRotated, self).__init__(*args, **kwargs)
assert (num_shared_convs + num_shared_fcs + num_cls_convs +
num_cls_fcs + num_reg_convs + num_reg_fcs > 0)
if num_cls_convs > 0 or num_reg_convs > 0:
assert num_shared_fcs == 0
if not self.with_cls:
assert num_cls_convs == 0 and num_cls_fcs == 0
if not self.with_reg:
assert num_reg_convs == 0 and num_reg_fcs == 0
self.num_shared_convs = num_shared_convs
self.num_shared_fcs = num_shared_fcs
self.num_cls_convs = num_cls_convs
self.num_cls_fcs = num_cls_fcs
self.num_reg_convs = num_reg_convs
self.num_reg_fcs = num_reg_fcs
self.conv_out_channels = conv_out_channels
self.fc_out_channels = fc_out_channels
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
# add shared convs and fcs
self.shared_convs, self.shared_fcs, last_layer_dim = \
self._add_conv_fc_branch(
self.num_shared_convs, self.num_shared_fcs, self.in_channels,
True)
self.shared_out_channels = last_layer_dim
# add cls specific branch
self.cls_convs, self.cls_fcs, self.cls_last_dim = \
self._add_conv_fc_branch(
self.num_cls_convs, self.num_cls_fcs, self.shared_out_channels)
# add reg specific branch
self.reg_convs, self.reg_fcs, self.reg_last_dim = \
self._add_conv_fc_branch(
self.num_reg_convs, self.num_reg_fcs, self.shared_out_channels)
if self.num_shared_fcs == 0 and not self.with_avg_pool:
if self.num_cls_fcs == 0:
self.cls_last_dim *= self.roi_feat_area
if self.num_reg_fcs == 0:
self.reg_last_dim *= self.roi_feat_area
self.relu = nn.ReLU(inplace=True)
# reconstruct fc_cls and fc_reg since input channels are changed
if self.with_cls:
self.fc_cls = nn.Linear(self.cls_last_dim, self.num_classes)
if self.with_reg:
out_dim_reg = (5 if self.reg_class_agnostic else 5 *
self.num_classes)
self.fc_reg = nn.Linear(self.reg_last_dim, out_dim_reg)
def _add_conv_fc_branch(self,
num_branch_convs,
num_branch_fcs,
in_channels,
is_shared=False):
"""Add shared or separable branch
convs -> avg pool (optional) -> fcs
"""
last_layer_dim = in_channels
# add branch specific conv layers
branch_convs = nn.ModuleList()
if num_branch_convs > 0:
for i in range(num_branch_convs):
conv_in_channels = (
last_layer_dim if i == 0 else self.conv_out_channels)
branch_convs.append(
ConvModule(
conv_in_channels,
self.conv_out_channels,
3,
padding=1,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
last_layer_dim = self.conv_out_channels
# add branch specific fc layers
branch_fcs = nn.ModuleList()
if num_branch_fcs > 0:
# for shared branch, only consider self.with_avg_pool
# for separated branches, also consider self.num_shared_fcs
if (is_shared
or self.num_shared_fcs == 0) and not self.with_avg_pool:
last_layer_dim *= self.roi_feat_area
for i in range(num_branch_fcs):
fc_in_channels = (
last_layer_dim if i == 0 else self.fc_out_channels)
branch_fcs.append(
nn.Linear(fc_in_channels, self.fc_out_channels))
last_layer_dim = self.fc_out_channels
return branch_convs, branch_fcs, last_layer_dim
def init_weights(self):
super(ConvFCBBoxHeadRotated, self).init_weights()
for module_list in [self.shared_fcs, self.cls_fcs, self.reg_fcs]:
for m in module_list.modules():
if isinstance(m, nn.Linear):
nn.init.xavier_uniform_(m.weight)
nn.init.constant_(m.bias, 0)
def forward(self, x):
# shared part
if self.num_shared_convs > 0:
for conv in self.shared_convs:
x = conv(x)
if self.num_shared_fcs > 0:
if self.with_avg_pool:
x = self.avg_pool(x)
x = x.view(x.size(0), -1)
for fc in self.shared_fcs:
x = self.relu(fc(x))
# separate branches
x_cls = x
x_reg = x
for conv in self.cls_convs:
x_cls = conv(x_cls)
if x_cls.dim() > 2:
if self.with_avg_pool:
x_cls = self.avg_pool(x_cls)
x_cls = x_cls.view(x_cls.size(0), -1)
for fc in self.cls_fcs:
x_cls = self.relu(fc(x_cls))
for conv in self.reg_convs:
x_reg = conv(x_reg)
if x_reg.dim() > 2:
if self.with_avg_pool:
x_reg = self.avg_pool(x_reg)
x_reg = x_reg.view(x_reg.size(0), -1)
for fc in self.reg_fcs:
x_reg = self.relu(fc(x_reg))
cls_score = self.fc_cls(x_cls) if self.with_cls else None
bbox_pred = self.fc_reg(x_reg) if self.with_reg else None
return cls_score, bbox_pred
@HEADS.register_module
class SharedFCBBoxHeadRotated(ConvFCBBoxHeadRotated):
def __init__(self, num_fcs=2, fc_out_channels=1024, *args, **kwargs):
assert num_fcs >= 1
super(SharedFCBBoxHeadRotated, self).__init__(
num_shared_convs=0,
num_shared_fcs=num_fcs,
num_cls_convs=0,
num_cls_fcs=0,
num_reg_convs=0,
num_reg_fcs=0,
fc_out_channels=fc_out_channels,
*args,
**kwargs)
| 7,037
| 36.83871
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads_rotated/double_bbox_head_rotated.py
|
import torch.nn as nn
from mmcv.cnn.weight_init import normal_init, xavier_init
from .bbox_head_rotated import BBoxHeadRotated
from ..backbones.resnet import Bottleneck
from ..registry import HEADS
from ..utils import ConvModule
class BasicResBlock(nn.Module):
"""Basic residual block.
This block is a little different from the block in the ResNet backbone.
The kernel size of conv1 is 1 in this block while 3 in ResNet BasicBlock.
Args:
in_channels (int): Channels of the input feature map.
out_channels (int): Channels of the output feature map.
conv_cfg (dict): The config dict for convolution layers.
norm_cfg (dict): The config dict for normalization layers.
"""
def __init__(self,
in_channels,
out_channels,
conv_cfg=None,
norm_cfg=dict(type='BN')):
super(BasicResBlock, self).__init__()
# main path
self.conv1 = ConvModule(
in_channels,
in_channels,
kernel_size=3,
padding=1,
bias=False,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg)
self.conv2 = ConvModule(
in_channels,
out_channels,
kernel_size=1,
bias=False,
activation=None,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg)
# identity path
self.conv_identity = ConvModule(
in_channels,
out_channels,
kernel_size=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
activation=None)
self.relu = nn.ReLU(inplace=True)
def forward(self, x):
identity = x
x = self.conv1(x)
x = self.conv2(x)
identity = self.conv_identity(identity)
out = x + identity
out = self.relu(out)
return out
@HEADS.register_module
class DoubleConvFCBBoxHeadRotated(BBoxHeadRotated):
r"""Bbox head used in Double-Head R-CNN
/-> cls
/-> shared convs ->
\-> reg
roi features
/-> cls
\-> shared fc ->
\-> reg
""" # noqa: W605
def __init__(self,
num_convs=0,
num_fcs=0,
conv_out_channels=1024,
fc_out_channels=1024,
conv_cfg=None,
norm_cfg=dict(type='BN'),
**kwargs):
kwargs.setdefault('with_avg_pool', True)
super(DoubleConvFCBBoxHeadRotated, self).__init__(**kwargs)
assert self.with_avg_pool
assert num_convs > 0
assert num_fcs > 0
self.num_convs = num_convs
self.num_fcs = num_fcs
self.conv_out_channels = conv_out_channels
self.fc_out_channels = fc_out_channels
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
# increase the channel of input features
self.res_block = BasicResBlock(self.in_channels,
self.conv_out_channels)
# add conv heads
self.conv_branch = self._add_conv_branch()
# add fc heads
self.fc_branch = self._add_fc_branch()
out_dim_reg = 5 if self.reg_class_agnostic else 5 * self.num_classes
self.fc_reg = nn.Linear(self.conv_out_channels, out_dim_reg)
self.fc_cls = nn.Linear(self.fc_out_channels, self.num_classes)
self.relu = nn.ReLU(inplace=True)
def _add_conv_branch(self):
"""Add the fc branch which consists of a sequential of conv layers"""
branch_convs = nn.ModuleList()
for i in range(self.num_convs):
branch_convs.append(
Bottleneck(
inplanes=self.conv_out_channels,
planes=self.conv_out_channels // 5,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg))
return branch_convs
def _add_fc_branch(self):
"""Add the fc branch which consists of a sequential of fc layers"""
branch_fcs = nn.ModuleList()
for i in range(self.num_fcs):
fc_in_channels = (
self.in_channels *
self.roi_feat_area if i == 0 else self.fc_out_channels)
branch_fcs.append(nn.Linear(fc_in_channels, self.fc_out_channels))
return branch_fcs
def init_weights(self):
normal_init(self.fc_cls, std=0.01)
normal_init(self.fc_reg, std=0.001)
for m in self.fc_branch.modules():
if isinstance(m, nn.Linear):
xavier_init(m, distribution='uniform')
def forward(self, x_cls, x_reg):
# conv head
x_conv = self.res_block(x_reg)
for conv in self.conv_branch:
x_conv = conv(x_conv)
if self.with_avg_pool:
x_conv = self.avg_pool(x_conv)
x_conv = x_conv.view(x_conv.size(0), -1)
bbox_pred = self.fc_reg(x_conv)
# fc head
x_fc = x_cls.view(x_cls.size(0), -1)
for fc in self.fc_branch:
x_fc = self.relu(fc(x_fc))
cls_score = self.fc_cls(x_fc)
return cls_score, bbox_pred
| 5,310
| 30.05848
| 78
|
py
|
s2anet
|
s2anet-master/mmdet/models/bbox_heads_rotated/__init__.py
|
from .bbox_head_rotated import BBoxHeadRotated
from .convfc_bbox_head_rotated import ConvFCBBoxHeadRotated, SharedFCBBoxHeadRotated
from .double_bbox_head_rotated import DoubleConvFCBBoxHeadRotated
__all__ = [
'BBoxHeadRotated', 'ConvFCBBoxHeadRotated', 'SharedFCBBoxHeadRotated', 'DoubleConvFCBBoxHeadRotated'
]
| 318
| 38.875
| 104
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/ghm_loss.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from ..registry import LOSSES
def _expand_binary_labels(labels, label_weights, label_channels):
bin_labels = labels.new_full((labels.size(0), label_channels), 0)
inds = torch.nonzero(labels >= 1).squeeze()
if inds.numel() > 0:
bin_labels[inds, labels[inds] - 1] = 1
bin_label_weights = label_weights.view(-1, 1).expand(
label_weights.size(0), label_channels)
return bin_labels, bin_label_weights
# TODO: code refactoring to make it consistent with other losses
@LOSSES.register_module
class GHMC(nn.Module):
"""GHM Classification Loss.
Details of the theorem can be viewed in the paper
"Gradient Harmonized Single-stage Detector".
https://arxiv.org/abs/1811.05181
Args:
bins (int): Number of the unit regions for distribution calculation.
momentum (float): The parameter for moving average.
use_sigmoid (bool): Can only be true for BCE based loss now.
loss_weight (float): The weight of the total GHM-C loss.
"""
def __init__(self, bins=10, momentum=0, use_sigmoid=True, loss_weight=1.0):
super(GHMC, self).__init__()
self.bins = bins
self.momentum = momentum
edges = torch.arange(bins + 1).float() / bins
self.register_buffer('edges', edges)
self.edges[-1] += 1e-6
if momentum > 0:
acc_sum = torch.zeros(bins)
self.register_buffer('acc_sum', acc_sum)
self.use_sigmoid = use_sigmoid
if not self.use_sigmoid:
raise NotImplementedError
self.loss_weight = loss_weight
def forward(self, pred, target, label_weight, *args, **kwargs):
"""Calculate the GHM-C loss.
Args:
pred (float tensor of size [batch_num, class_num]):
The direct prediction of classification fc layer.
target (float tensor of size [batch_num, class_num]):
Binary class target for each sample.
label_weight (float tensor of size [batch_num, class_num]):
the value is 1 if the sample is valid and 0 if ignored.
Returns:
The gradient harmonized loss.
"""
# the target should be binary class label
if pred.dim() != target.dim():
target, label_weight = _expand_binary_labels(
target, label_weight, pred.size(-1))
target, label_weight = target.float(), label_weight.float()
edges = self.edges
mmt = self.momentum
weights = torch.zeros_like(pred)
# gradient length
g = torch.abs(pred.sigmoid().detach() - target)
valid = label_weight > 0
tot = max(valid.float().sum().item(), 1.0)
n = 0 # n valid bins
for i in range(self.bins):
inds = (g >= edges[i]) & (g < edges[i + 1]) & valid
num_in_bin = inds.sum().item()
if num_in_bin > 0:
if mmt > 0:
self.acc_sum[i] = mmt * self.acc_sum[i] \
+ (1 - mmt) * num_in_bin
weights[inds] = tot / self.acc_sum[i]
else:
weights[inds] = tot / num_in_bin
n += 1
if n > 0:
weights = weights / n
loss = F.binary_cross_entropy_with_logits(
pred, target, weights, reduction='sum') / tot
return loss * self.loss_weight
# TODO: code refactoring to make it consistent with other losses
@LOSSES.register_module
class GHMR(nn.Module):
"""GHM Regression Loss.
Details of the theorem can be viewed in the paper
"Gradient Harmonized Single-stage Detector"
https://arxiv.org/abs/1811.05181
Args:
mu (float): The parameter for the Authentic Smooth L1 loss.
bins (int): Number of the unit regions for distribution calculation.
momentum (float): The parameter for moving average.
loss_weight (float): The weight of the total GHM-R loss.
"""
def __init__(self, mu=0.02, bins=10, momentum=0, loss_weight=1.0):
super(GHMR, self).__init__()
self.mu = mu
self.bins = bins
edges = torch.arange(bins + 1).float() / bins
self.register_buffer('edges', edges)
self.edges[-1] = 1e3
self.momentum = momentum
if momentum > 0:
acc_sum = torch.zeros(bins)
self.register_buffer('acc_sum', acc_sum)
self.loss_weight = loss_weight
# TODO: support reduction parameter
def forward(self, pred, target, label_weight, avg_factor=None):
"""Calculate the GHM-R loss.
Args:
pred (float tensor of size [batch_num, 4 (* class_num)]):
The prediction of box regression layer. Channel number can be 4
or 4 * class_num depending on whether it is class-agnostic.
target (float tensor of size [batch_num, 4 (* class_num)]):
The target regression values with the same size of pred.
label_weight (float tensor of size [batch_num, 4 (* class_num)]):
The weight of each sample, 0 if ignored.
Returns:
The gradient harmonized loss.
"""
mu = self.mu
edges = self.edges
mmt = self.momentum
# ASL1 loss
diff = pred - target
loss = torch.sqrt(diff * diff + mu * mu) - mu
# gradient length
g = torch.abs(diff / torch.sqrt(mu * mu + diff * diff)).detach()
weights = torch.zeros_like(g)
valid = label_weight > 0
tot = max(label_weight.float().sum().item(), 1.0)
n = 0 # n: valid bins
for i in range(self.bins):
inds = (g >= edges[i]) & (g < edges[i + 1]) & valid
num_in_bin = inds.sum().item()
if num_in_bin > 0:
n += 1
if mmt > 0:
self.acc_sum[i] = mmt * self.acc_sum[i] \
+ (1 - mmt) * num_in_bin
weights[inds] = tot / self.acc_sum[i]
else:
weights[inds] = tot / num_in_bin
if n > 0:
weights /= n
loss = loss * weights
loss = loss.sum() / tot
return loss * self.loss_weight
| 6,304
| 35.656977
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/mse_loss.py
|
import torch.nn as nn
import torch.nn.functional as F
from ..registry import LOSSES
from .utils import weighted_loss
mse_loss = weighted_loss(F.mse_loss)
@LOSSES.register_module
class MSELoss(nn.Module):
def __init__(self, reduction='mean', loss_weight=1.0):
super().__init__()
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self, pred, target, weight=None, avg_factor=None):
loss = self.loss_weight * mse_loss(
pred,
target,
weight,
reduction=self.reduction,
avg_factor=avg_factor)
return loss
| 632
| 23.346154
| 66
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/balanced_l1_loss.py
|
import numpy as np
import torch
import torch.nn as nn
from ..registry import LOSSES
from .utils import weighted_loss
@weighted_loss
def balanced_l1_loss(pred,
target,
beta=1.0,
alpha=0.5,
gamma=1.5,
reduction='mean'):
assert beta > 0
assert pred.size() == target.size() and target.numel() > 0
diff = torch.abs(pred - target)
b = np.e**(gamma / alpha) - 1
loss = torch.where(
diff < beta, alpha / b *
(b * diff + 1) * torch.log(b * diff / beta + 1) - alpha * diff,
gamma * diff + gamma / b - alpha * beta)
return loss
@LOSSES.register_module
class BalancedL1Loss(nn.Module):
"""Balanced L1 Loss
arXiv: https://arxiv.org/pdf/1904.02701.pdf (CVPR 2019)
"""
def __init__(self,
alpha=0.5,
gamma=1.5,
beta=1.0,
reduction='mean',
loss_weight=1.0):
super(BalancedL1Loss, self).__init__()
self.alpha = alpha
self.gamma = gamma
self.beta = beta
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss_bbox = self.loss_weight * balanced_l1_loss(
pred,
target,
weight,
alpha=self.alpha,
gamma=self.gamma,
beta=self.beta,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss_bbox
| 1,884
| 25.928571
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/iou_loss.py
|
import torch
import torch.nn as nn
from mmdet.core import bbox_overlaps
from ..registry import LOSSES
from .utils import weighted_loss
@weighted_loss
def iou_loss(pred, target, eps=1e-6):
"""IoU loss.
Computing the IoU loss between a set of predicted bboxes and target bboxes.
The loss is calculated as negative log of IoU.
Args:
pred (Tensor): Predicted bboxes of format (x1, y1, x2, y2),
shape (n, 4).
target (Tensor): Corresponding gt bboxes, shape (n, 4).
eps (float): Eps to avoid log(0).
Return:
Tensor: Loss tensor.
"""
ious = bbox_overlaps(pred, target, is_aligned=True).clamp(min=eps)
loss = -ious.log()
return loss
@weighted_loss
def bounded_iou_loss(pred, target, beta=0.2, eps=1e-3):
"""Improving Object Localization with Fitness NMS and Bounded IoU Loss,
https://arxiv.org/abs/1711.00164.
Args:
pred (tensor): Predicted bboxes.
target (tensor): Target bboxes.
beta (float): beta parameter in smoothl1.
eps (float): eps to avoid NaN.
"""
pred_ctrx = (pred[:, 0] + pred[:, 2]) * 0.5
pred_ctry = (pred[:, 1] + pred[:, 3]) * 0.5
pred_w = pred[:, 2] - pred[:, 0] + 1
pred_h = pred[:, 3] - pred[:, 1] + 1
with torch.no_grad():
target_ctrx = (target[:, 0] + target[:, 2]) * 0.5
target_ctry = (target[:, 1] + target[:, 3]) * 0.5
target_w = target[:, 2] - target[:, 0] + 1
target_h = target[:, 3] - target[:, 1] + 1
dx = target_ctrx - pred_ctrx
dy = target_ctry - pred_ctry
loss_dx = 1 - torch.max(
(target_w - 2 * dx.abs()) /
(target_w + 2 * dx.abs() + eps), torch.zeros_like(dx))
loss_dy = 1 - torch.max(
(target_h - 2 * dy.abs()) /
(target_h + 2 * dy.abs() + eps), torch.zeros_like(dy))
loss_dw = 1 - torch.min(target_w / (pred_w + eps), pred_w /
(target_w + eps))
loss_dh = 1 - torch.min(target_h / (pred_h + eps), pred_h /
(target_h + eps))
loss_comb = torch.stack([loss_dx, loss_dy, loss_dw, loss_dh],
dim=-1).view(loss_dx.size(0), -1)
loss = torch.where(loss_comb < beta, 0.5 * loss_comb * loss_comb / beta,
loss_comb - 0.5 * beta)
return loss
@weighted_loss
def giou_loss(pred, target, eps=1e-7):
"""
Generalized Intersection over Union: A Metric and A Loss for
Bounding Box Regression
https://arxiv.org/abs/1902.09630
code refer to:
https://github.com/sfzhang15/ATSS/blob/master/atss_core/modeling/rpn/atss/loss.py#L36
Args:
pred (Tensor): Predicted bboxes of format (x1, y1, x2, y2),
shape (n, 4).
target (Tensor): Corresponding gt bboxes, shape (n, 4).
eps (float): Eps to avoid log(0).
Return:
Tensor: Loss tensor.
"""
# overlap
lt = torch.max(pred[:, :2], target[:, :2])
rb = torch.min(pred[:, 2:], target[:, 2:])
wh = (rb - lt + 1).clamp(min=0)
overlap = wh[:, 0] * wh[:, 1]
# union
ap = (pred[:, 2] - pred[:, 0] + 1) * (pred[:, 3] - pred[:, 1] + 1)
ag = (target[:, 2] - target[:, 0] + 1) * (target[:, 3] - target[:, 1] + 1)
union = ap + ag - overlap + eps
# IoU
ious = overlap / union
# enclose area
enclose_x1y1 = torch.min(pred[:, :2], target[:, :2])
enclose_x2y2 = torch.max(pred[:, 2:], target[:, 2:])
enclose_wh = (enclose_x2y2 - enclose_x1y1 + 1).clamp(min=0)
enclose_area = enclose_wh[:, 0] * enclose_wh[:, 1] + eps
# GIoU
gious = ious - (enclose_area - union) / enclose_area
loss = 1 - gious
return loss
@LOSSES.register_module
class IoULoss(nn.Module):
def __init__(self, eps=1e-6, reduction='mean', loss_weight=1.0):
super(IoULoss, self).__init__()
self.eps = eps
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
if weight is not None and not torch.any(weight > 0):
return (pred * weight).sum() # 0
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss = self.loss_weight * iou_loss(
pred,
target,
weight,
eps=self.eps,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss
@LOSSES.register_module
class BoundedIoULoss(nn.Module):
def __init__(self, beta=0.2, eps=1e-3, reduction='mean', loss_weight=1.0):
super(BoundedIoULoss, self).__init__()
self.beta = beta
self.eps = eps
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
if weight is not None and not torch.any(weight > 0):
return (pred * weight).sum() # 0
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss = self.loss_weight * bounded_iou_loss(
pred,
target,
weight,
beta=self.beta,
eps=self.eps,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss
@LOSSES.register_module
class GIoULoss(nn.Module):
def __init__(self, eps=1e-6, reduction='mean', loss_weight=1.0):
super(GIoULoss, self).__init__()
self.eps = eps
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
if weight is not None and not torch.any(weight > 0):
return (pred * weight).sum() # 0
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss = self.loss_weight * giou_loss(
pred,
target,
weight,
eps=self.eps,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss
| 6,650
| 30.671429
| 89
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/smooth_l1_loss.py
|
import torch
import torch.nn as nn
from ..registry import LOSSES
from .utils import weighted_loss
@weighted_loss
def smooth_l1_loss(pred, target, beta=1.0):
assert beta > 0
assert pred.size() == target.size() and target.numel() > 0
diff = torch.abs(pred - target)
loss = torch.where(diff < beta, 0.5 * diff * diff / beta,
diff - 0.5 * beta)
return loss
@LOSSES.register_module
class SmoothL1Loss(nn.Module):
def __init__(self, beta=1.0, reduction='mean', loss_weight=1.0):
super(SmoothL1Loss, self).__init__()
self.beta = beta
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss_bbox = self.loss_weight * smooth_l1_loss(
pred,
target,
weight,
beta=self.beta,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss_bbox
| 1,288
| 27.021739
| 73
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/utils.py
|
import functools
import torch.nn.functional as F
def reduce_loss(loss, reduction):
"""Reduce loss as specified.
Args:
loss (Tensor): Elementwise loss tensor.
reduction (str): Options are "none", "mean" and "sum".
Return:
Tensor: Reduced loss tensor.
"""
reduction_enum = F._Reduction.get_enum(reduction)
# none: 0, elementwise_mean:1, sum: 2
if reduction_enum == 0:
return loss
elif reduction_enum == 1:
return loss.mean()
elif reduction_enum == 2:
return loss.sum()
def weight_reduce_loss(loss, weight=None, reduction='mean', avg_factor=None):
"""Apply element-wise weight and reduce loss.
Args:
loss (Tensor): Element-wise loss.
weight (Tensor): Element-wise weights.
reduction (str): Same as built-in losses of PyTorch.
avg_factor (float): Avarage factor when computing the mean of losses.
Returns:
Tensor: Processed loss values.
"""
# if weight is specified, apply element-wise weight
if weight is not None:
loss = loss * weight
# if avg_factor is not specified, just reduce the loss
if avg_factor is None:
loss = reduce_loss(loss, reduction)
else:
# if reduction is mean, then average the loss by avg_factor
if reduction == 'mean':
loss = loss.sum() / avg_factor
# if reduction is 'none', then do nothing, otherwise raise an error
elif reduction != 'none':
raise ValueError('avg_factor can not be used with reduction="sum"')
return loss
def weighted_loss(loss_func):
"""Create a weighted version of a given loss function.
To use this decorator, the loss function must have the signature like
`loss_func(pred, target, **kwargs)`. The function only needs to compute
element-wise loss without any reduction. This decorator will add weight
and reduction arguments to the function. The decorated function will have
the signature like `loss_func(pred, target, weight=None, reduction='mean',
avg_factor=None, **kwargs)`.
:Example:
>>> import torch
>>> @weighted_loss
>>> def l1_loss(pred, target):
>>> return (pred - target).abs()
>>> pred = torch.Tensor([0, 2, 3])
>>> target = torch.Tensor([1, 1, 1])
>>> weight = torch.Tensor([1, 0, 1])
>>> l1_loss(pred, target)
tensor(1.3333)
>>> l1_loss(pred, target, weight)
tensor(1.)
>>> l1_loss(pred, target, reduction='none')
tensor([1., 1., 2.])
>>> l1_loss(pred, target, weight, avg_factor=2)
tensor(1.5000)
"""
@functools.wraps(loss_func)
def wrapper(pred,
target,
weight=None,
reduction='mean',
avg_factor=None,
**kwargs):
# get element-wise loss
loss = loss_func(pred, target, **kwargs)
loss = weight_reduce_loss(loss, weight, reduction, avg_factor)
return loss
return wrapper
| 3,003
| 29.343434
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/accuracy.py
|
import torch.nn as nn
def accuracy(pred, target, topk=1):
assert isinstance(topk, (int, tuple))
if isinstance(topk, int):
topk = (topk, )
return_single = True
else:
return_single = False
maxk = max(topk)
_, pred_label = pred.topk(maxk, dim=1)
pred_label = pred_label.t()
correct = pred_label.eq(target.view(1, -1).expand_as(pred_label))
res = []
for k in topk:
correct_k = correct[:k].view(-1).float().sum(0, keepdim=True)
res.append(correct_k.mul_(100.0 / pred.size(0)))
return res[0] if return_single else res
class Accuracy(nn.Module):
def __init__(self, topk=(1, )):
super().__init__()
self.topk = topk
def forward(self, pred, target):
return accuracy(pred, target, self.topk)
| 801
| 24.0625
| 69
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/focal_loss.py
|
import torch.nn as nn
import torch.nn.functional as F
from mmdet.ops import sigmoid_focal_loss as _sigmoid_focal_loss
from ..registry import LOSSES
from .utils import weight_reduce_loss
# This method is only for debugging
def py_sigmoid_focal_loss(pred,
target,
weight=None,
gamma=2.0,
alpha=0.25,
reduction='mean',
avg_factor=None):
pred_sigmoid = pred.sigmoid()
target = target.type_as(pred)
pt = (1 - pred_sigmoid) * target + pred_sigmoid * (1 - target)
focal_weight = (alpha * target + (1 - alpha) *
(1 - target)) * pt.pow(gamma)
loss = F.binary_cross_entropy_with_logits(
pred, target, reduction='none') * focal_weight
loss = weight_reduce_loss(loss, weight, reduction, avg_factor)
return loss
def sigmoid_focal_loss(pred,
target,
weight=None,
gamma=2.0,
alpha=0.25,
reduction='mean',
avg_factor=None):
# Function.apply does not accept keyword arguments, so the decorator
# "weighted_loss" is not applicable
loss = _sigmoid_focal_loss(pred, target, gamma, alpha)
# TODO: find a proper way to handle the shape of weight
if weight is not None:
weight = weight.view(-1, 1)
loss = weight_reduce_loss(loss, weight, reduction, avg_factor)
return loss
@LOSSES.register_module
class FocalLoss(nn.Module):
def __init__(self,
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
reduction='mean',
loss_weight=1.0):
super(FocalLoss, self).__init__()
assert use_sigmoid is True, 'Only sigmoid focal loss supported now.'
self.use_sigmoid = use_sigmoid
self.gamma = gamma
self.alpha = alpha
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None):
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
if self.use_sigmoid:
loss_cls = self.loss_weight * sigmoid_focal_loss(
pred,
target,
weight,
gamma=self.gamma,
alpha=self.alpha,
reduction=reduction,
avg_factor=avg_factor)
else:
raise NotImplementedError
return loss_cls
| 2,783
| 32.95122
| 76
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/rotated_iou_loss.py
|
import torch
import torch.nn as nn
from mmdet.ops import box_iou_rotated_differentiable
from ..registry import LOSSES
from .utils import weighted_loss
@weighted_loss
def iou_loss(pred, target, linear=False, eps=1e-6):
"""IoU loss.
Computing the IoU loss between a set of predicted bboxes and target bboxes.
The loss is calculated as negative log of IoU.
Args:
pred (Tensor): Predicted bboxes of format (x, y, w, h, a),
shape (n, 5).
target (Tensor): Corresponding gt bboxes, shape (n, 5).
linear (bool): If True, use linear scale of loss instead of
log scale. Default: False.
eps (float): Eps to avoid log(0).
Return:
Tensor: Loss tensor.
"""
ious = box_iou_rotated_differentiable(pred, target).clamp(min=eps)
if linear:
loss = 1 - ious
else:
loss = -ious.log()
return loss
@LOSSES.register_module
class RotatedIoULoss(nn.Module):
def __init__(self, linear=False, eps=1e-6, reduction='mean', loss_weight=1.0):
super(RotatedIoULoss, self).__init__()
self.linear = linear
self.eps = eps
self.reduction = reduction
self.loss_weight = loss_weight
def forward(self,
pred,
target,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
if weight is not None and not torch.any(weight > 0):
return (pred * weight).sum() # 0
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
if (weight is not None) and (not torch.any(weight > 0)) and (
reduction != 'none'):
return (pred * weight).sum() # 0
if weight is not None and weight.dim() > 1:
# TODO: remove this in the future
# reduce the weight of shape (n, 4) to (n,) to match the
# iou_loss of shape (n,)
assert weight.shape == pred.shape
weight = weight.mean(-1)
loss = self.loss_weight * iou_loss(
pred,
target,
weight,
linear=self.linear,
eps=self.eps,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss
| 2,397
| 30.552632
| 82
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/cross_entropy_loss.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from ..registry import LOSSES
from .utils import weight_reduce_loss
def cross_entropy(pred, label, weight=None, reduction='mean', avg_factor=None):
# element-wise losses
loss = F.cross_entropy(pred, label, reduction='none')
# apply weights and do the reduction
if weight is not None:
weight = weight.float()
loss = weight_reduce_loss(
loss, weight=weight, reduction=reduction, avg_factor=avg_factor)
return loss
def _expand_binary_labels(labels, label_weights, label_channels):
bin_labels = labels.new_full((labels.size(0), label_channels), 0)
inds = torch.nonzero(labels >= 1).squeeze()
if inds.numel() > 0:
bin_labels[inds, labels[inds] - 1] = 1
if label_weights is None:
bin_label_weights = None
else:
bin_label_weights = label_weights.view(-1, 1).expand(
label_weights.size(0), label_channels)
return bin_labels, bin_label_weights
def binary_cross_entropy(pred,
label,
weight=None,
reduction='mean',
avg_factor=None):
if pred.dim() != label.dim():
label, weight = _expand_binary_labels(label, weight, pred.size(-1))
# weighted element-wise losses
if weight is not None:
weight = weight.float()
loss = F.binary_cross_entropy_with_logits(
pred, label.float(), weight, reduction='none')
# do the reduction for the weighted loss
loss = weight_reduce_loss(loss, reduction=reduction, avg_factor=avg_factor)
return loss
def mask_cross_entropy(pred, target, label, reduction='mean', avg_factor=None):
# TODO: handle these two reserved arguments
assert reduction == 'mean' and avg_factor is None
num_rois = pred.size()[0]
inds = torch.arange(0, num_rois, dtype=torch.long, device=pred.device)
pred_slice = pred[inds, label].squeeze(1)
return F.binary_cross_entropy_with_logits(
pred_slice, target, reduction='mean')[None]
@LOSSES.register_module
class CrossEntropyLoss(nn.Module):
def __init__(self,
use_sigmoid=False,
use_mask=False,
reduction='mean',
loss_weight=1.0):
super(CrossEntropyLoss, self).__init__()
assert (use_sigmoid is False) or (use_mask is False)
self.use_sigmoid = use_sigmoid
self.use_mask = use_mask
self.reduction = reduction
self.loss_weight = loss_weight
if self.use_sigmoid:
self.cls_criterion = binary_cross_entropy
elif self.use_mask:
self.cls_criterion = mask_cross_entropy
else:
self.cls_criterion = cross_entropy
def forward(self,
cls_score,
label,
weight=None,
avg_factor=None,
reduction_override=None,
**kwargs):
assert reduction_override in (None, 'none', 'mean', 'sum')
reduction = (
reduction_override if reduction_override else self.reduction)
loss_cls = self.loss_weight * self.cls_criterion(
cls_score,
label,
weight,
reduction=reduction,
avg_factor=avg_factor,
**kwargs)
return loss_cls
| 3,386
| 31.567308
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/losses/__init__.py
|
from .accuracy import Accuracy, accuracy
from .balanced_l1_loss import BalancedL1Loss, balanced_l1_loss
from .cross_entropy_loss import (CrossEntropyLoss, binary_cross_entropy,
cross_entropy, mask_cross_entropy)
from .focal_loss import FocalLoss, sigmoid_focal_loss
from .ghm_loss import GHMC, GHMR
from .iou_loss import (BoundedIoULoss, GIoULoss, IoULoss, bounded_iou_loss,
iou_loss, giou_loss)
from .mse_loss import MSELoss, mse_loss
from .smooth_l1_loss import SmoothL1Loss, smooth_l1_loss
from .utils import reduce_loss, weight_reduce_loss, weighted_loss
from .rotated_iou_loss import RotatedIoULoss
__all__ = [
'accuracy', 'Accuracy', 'cross_entropy', 'binary_cross_entropy',
'mask_cross_entropy', 'CrossEntropyLoss', 'sigmoid_focal_loss',
'FocalLoss', 'smooth_l1_loss', 'SmoothL1Loss', 'balanced_l1_loss',
'BalancedL1Loss', 'mse_loss', 'MSELoss', 'iou_loss', 'bounded_iou_loss',
'IoULoss', 'BoundedIoULoss', 'GHMC', 'GHMR', 'reduce_loss',
'weight_reduce_loss', 'weighted_loss', 'GIoULoss', 'RotatedIoULoss'
]
| 1,097
| 46.73913
| 76
|
py
|
s2anet
|
s2anet-master/mmdet/models/backbones/hrnet.py
|
import logging
import torch.nn as nn
from mmcv.cnn import constant_init, kaiming_init
from mmcv.runner import load_checkpoint
from torch.nn.modules.batchnorm import _BatchNorm
from ..registry import BACKBONES
from ..utils import build_conv_layer, build_norm_layer
from .resnet import BasicBlock, Bottleneck
class HRModule(nn.Module):
""" High-Resolution Module for HRNet. In this module, every branch
has 4 BasicBlocks/Bottlenecks. Fusion/Exchange is in this module.
"""
def __init__(self,
num_branches,
blocks,
num_blocks,
in_channels,
num_channels,
multiscale_output=True,
with_cp=False,
conv_cfg=None,
norm_cfg=dict(type='BN')):
super(HRModule, self).__init__()
self._check_branches(num_branches, num_blocks, in_channels,
num_channels)
self.in_channels = in_channels
self.num_branches = num_branches
self.multiscale_output = multiscale_output
self.norm_cfg = norm_cfg
self.conv_cfg = conv_cfg
self.with_cp = with_cp
self.branches = self._make_branches(num_branches, blocks, num_blocks,
num_channels)
self.fuse_layers = self._make_fuse_layers()
self.relu = nn.ReLU(inplace=False)
def _check_branches(self, num_branches, num_blocks, in_channels,
num_channels):
if num_branches != len(num_blocks):
error_msg = 'NUM_BRANCHES({}) <> NUM_BLOCKS({})'.format(
num_branches, len(num_blocks))
raise ValueError(error_msg)
if num_branches != len(num_channels):
error_msg = 'NUM_BRANCHES({}) <> NUM_CHANNELS({})'.format(
num_branches, len(num_channels))
raise ValueError(error_msg)
if num_branches != len(in_channels):
error_msg = 'NUM_BRANCHES({}) <> NUM_INCHANNELS({})'.format(
num_branches, len(in_channels))
raise ValueError(error_msg)
def _make_one_branch(self,
branch_index,
block,
num_blocks,
num_channels,
stride=1):
downsample = None
if stride != 1 or \
self.in_channels[branch_index] != \
num_channels[branch_index] * block.expansion:
downsample = nn.Sequential(
build_conv_layer(
self.conv_cfg,
self.in_channels[branch_index],
num_channels[branch_index] * block.expansion,
kernel_size=1,
stride=stride,
bias=False),
build_norm_layer(self.norm_cfg, num_channels[branch_index] *
block.expansion)[1])
layers = []
layers.append(
block(
self.in_channels[branch_index],
num_channels[branch_index],
stride,
downsample=downsample,
with_cp=self.with_cp,
norm_cfg=self.norm_cfg,
conv_cfg=self.conv_cfg))
self.in_channels[branch_index] = \
num_channels[branch_index] * block.expansion
for i in range(1, num_blocks[branch_index]):
layers.append(
block(
self.in_channels[branch_index],
num_channels[branch_index],
with_cp=self.with_cp,
norm_cfg=self.norm_cfg,
conv_cfg=self.conv_cfg))
return nn.Sequential(*layers)
def _make_branches(self, num_branches, block, num_blocks, num_channels):
branches = []
for i in range(num_branches):
branches.append(
self._make_one_branch(i, block, num_blocks, num_channels))
return nn.ModuleList(branches)
def _make_fuse_layers(self):
if self.num_branches == 1:
return None
num_branches = self.num_branches
in_channels = self.in_channels
fuse_layers = []
num_out_branches = num_branches if self.multiscale_output else 1
for i in range(num_out_branches):
fuse_layer = []
for j in range(num_branches):
if j > i:
fuse_layer.append(
nn.Sequential(
build_conv_layer(
self.conv_cfg,
in_channels[j],
in_channels[i],
kernel_size=1,
stride=1,
padding=0,
bias=False),
build_norm_layer(self.norm_cfg, in_channels[i])[1],
nn.Upsample(
scale_factor=2**(j - i), mode='nearest')))
elif j == i:
fuse_layer.append(None)
else:
conv_downsamples = []
for k in range(i - j):
if k == i - j - 1:
conv_downsamples.append(
nn.Sequential(
build_conv_layer(
self.conv_cfg,
in_channels[j],
in_channels[i],
kernel_size=3,
stride=2,
padding=1,
bias=False),
build_norm_layer(self.norm_cfg,
in_channels[i])[1]))
else:
conv_downsamples.append(
nn.Sequential(
build_conv_layer(
self.conv_cfg,
in_channels[j],
in_channels[j],
kernel_size=3,
stride=2,
padding=1,
bias=False),
build_norm_layer(self.norm_cfg,
in_channels[j])[1],
nn.ReLU(inplace=False)))
fuse_layer.append(nn.Sequential(*conv_downsamples))
fuse_layers.append(nn.ModuleList(fuse_layer))
return nn.ModuleList(fuse_layers)
def forward(self, x):
if self.num_branches == 1:
return [self.branches[0](x[0])]
for i in range(self.num_branches):
x[i] = self.branches[i](x[i])
x_fuse = []
for i in range(len(self.fuse_layers)):
y = 0
for j in range(self.num_branches):
if i == j:
y += x[j]
else:
y += self.fuse_layers[i][j](x[j])
x_fuse.append(self.relu(y))
return x_fuse
@BACKBONES.register_module
class HRNet(nn.Module):
"""HRNet backbone.
High-Resolution Representations for Labeling Pixels and Regions
arXiv: https://arxiv.org/abs/1904.04514
Args:
extra (dict): detailed configuration for each stage of HRNet.
in_channels (int): Number of input image channels. Normally 3.
conv_cfg (dict): dictionary to construct and config conv layer.
norm_cfg (dict): dictionary to construct and config norm layer.
norm_eval (bool): Whether to set norm layers to eval mode, namely,
freeze running stats (mean and var). Note: Effect on Batch Norm
and its variants only.
with_cp (bool): Use checkpoint or not. Using checkpoint will save some
memory while slowing down the training speed.
zero_init_residual (bool): whether to use zero init for last norm layer
in resblocks to let them behave as identity.
Example:
>>> from mmdet.models import HRNet
>>> import torch
>>> extra = dict(
>>> stage1=dict(
>>> num_modules=1,
>>> num_branches=1,
>>> block='BOTTLENECK',
>>> num_blocks=(4, ),
>>> num_channels=(64, )),
>>> stage2=dict(
>>> num_modules=1,
>>> num_branches=2,
>>> block='BASIC',
>>> num_blocks=(4, 4),
>>> num_channels=(32, 64)),
>>> stage3=dict(
>>> num_modules=4,
>>> num_branches=3,
>>> block='BASIC',
>>> num_blocks=(4, 4, 4),
>>> num_channels=(32, 64, 128)),
>>> stage4=dict(
>>> num_modules=3,
>>> num_branches=4,
>>> block='BASIC',
>>> num_blocks=(4, 4, 4, 4),
>>> num_channels=(32, 64, 128, 256)))
>>> self = HRNet(extra, in_channels=1)
>>> self.eval()
>>> inputs = torch.rand(1, 1, 32, 32)
>>> level_outputs = self.forward(inputs)
>>> for level_out in level_outputs:
... print(tuple(level_out.shape))
(1, 32, 8, 8)
(1, 64, 4, 4)
(1, 128, 2, 2)
(1, 256, 1, 1)
"""
blocks_dict = {'BASIC': BasicBlock, 'BOTTLENECK': Bottleneck}
def __init__(self,
extra,
in_channels=3,
conv_cfg=None,
norm_cfg=dict(type='BN'),
norm_eval=True,
with_cp=False,
zero_init_residual=False):
super(HRNet, self).__init__()
self.extra = extra
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.norm_eval = norm_eval
self.with_cp = with_cp
self.zero_init_residual = zero_init_residual
# stem net
self.norm1_name, norm1 = build_norm_layer(self.norm_cfg, 64, postfix=1)
self.norm2_name, norm2 = build_norm_layer(self.norm_cfg, 64, postfix=2)
self.conv1 = build_conv_layer(
self.conv_cfg,
in_channels,
64,
kernel_size=3,
stride=2,
padding=1,
bias=False)
self.add_module(self.norm1_name, norm1)
self.conv2 = build_conv_layer(
self.conv_cfg,
64,
64,
kernel_size=3,
stride=2,
padding=1,
bias=False)
self.add_module(self.norm2_name, norm2)
self.relu = nn.ReLU(inplace=True)
# stage 1
self.stage1_cfg = self.extra['stage1']
num_channels = self.stage1_cfg['num_channels'][0]
block_type = self.stage1_cfg['block']
num_blocks = self.stage1_cfg['num_blocks'][0]
block = self.blocks_dict[block_type]
stage1_out_channels = num_channels * block.expansion
self.layer1 = self._make_layer(block, 64, num_channels, num_blocks)
# stage 2
self.stage2_cfg = self.extra['stage2']
num_channels = self.stage2_cfg['num_channels']
block_type = self.stage2_cfg['block']
block = self.blocks_dict[block_type]
num_channels = [channel * block.expansion for channel in num_channels]
self.transition1 = self._make_transition_layer([stage1_out_channels],
num_channels)
self.stage2, pre_stage_channels = self._make_stage(
self.stage2_cfg, num_channels)
# stage 3
self.stage3_cfg = self.extra['stage3']
num_channels = self.stage3_cfg['num_channels']
block_type = self.stage3_cfg['block']
block = self.blocks_dict[block_type]
num_channels = [channel * block.expansion for channel in num_channels]
self.transition2 = self._make_transition_layer(pre_stage_channels,
num_channels)
self.stage3, pre_stage_channels = self._make_stage(
self.stage3_cfg, num_channels)
# stage 4
self.stage4_cfg = self.extra['stage4']
num_channels = self.stage4_cfg['num_channels']
block_type = self.stage4_cfg['block']
block = self.blocks_dict[block_type]
num_channels = [channel * block.expansion for channel in num_channels]
self.transition3 = self._make_transition_layer(pre_stage_channels,
num_channels)
self.stage4, pre_stage_channels = self._make_stage(
self.stage4_cfg, num_channels)
@property
def norm1(self):
return getattr(self, self.norm1_name)
@property
def norm2(self):
return getattr(self, self.norm2_name)
def _make_transition_layer(self, num_channels_pre_layer,
num_channels_cur_layer):
num_branches_cur = len(num_channels_cur_layer)
num_branches_pre = len(num_channels_pre_layer)
transition_layers = []
for i in range(num_branches_cur):
if i < num_branches_pre:
if num_channels_cur_layer[i] != num_channels_pre_layer[i]:
transition_layers.append(
nn.Sequential(
build_conv_layer(
self.conv_cfg,
num_channels_pre_layer[i],
num_channels_cur_layer[i],
kernel_size=3,
stride=1,
padding=1,
bias=False),
build_norm_layer(self.norm_cfg,
num_channels_cur_layer[i])[1],
nn.ReLU(inplace=True)))
else:
transition_layers.append(None)
else:
conv_downsamples = []
for j in range(i + 1 - num_branches_pre):
in_channels = num_channels_pre_layer[-1]
out_channels = num_channels_cur_layer[i] \
if j == i - num_branches_pre else in_channels
conv_downsamples.append(
nn.Sequential(
build_conv_layer(
self.conv_cfg,
in_channels,
out_channels,
kernel_size=3,
stride=2,
padding=1,
bias=False),
build_norm_layer(self.norm_cfg, out_channels)[1],
nn.ReLU(inplace=True)))
transition_layers.append(nn.Sequential(*conv_downsamples))
return nn.ModuleList(transition_layers)
def _make_layer(self, block, inplanes, planes, blocks, stride=1):
downsample = None
if stride != 1 or inplanes != planes * block.expansion:
downsample = nn.Sequential(
build_conv_layer(
self.conv_cfg,
inplanes,
planes * block.expansion,
kernel_size=1,
stride=stride,
bias=False),
build_norm_layer(self.norm_cfg, planes * block.expansion)[1])
layers = []
layers.append(
block(
inplanes,
planes,
stride,
downsample=downsample,
with_cp=self.with_cp,
norm_cfg=self.norm_cfg,
conv_cfg=self.conv_cfg))
inplanes = planes * block.expansion
for i in range(1, blocks):
layers.append(
block(
inplanes,
planes,
with_cp=self.with_cp,
norm_cfg=self.norm_cfg,
conv_cfg=self.conv_cfg))
return nn.Sequential(*layers)
def _make_stage(self, layer_config, in_channels, multiscale_output=True):
num_modules = layer_config['num_modules']
num_branches = layer_config['num_branches']
num_blocks = layer_config['num_blocks']
num_channels = layer_config['num_channels']
block = self.blocks_dict[layer_config['block']]
hr_modules = []
for i in range(num_modules):
# multi_scale_output is only used for the last module
if not multiscale_output and i == num_modules - 1:
reset_multiscale_output = False
else:
reset_multiscale_output = True
hr_modules.append(
HRModule(
num_branches,
block,
num_blocks,
in_channels,
num_channels,
reset_multiscale_output,
with_cp=self.with_cp,
norm_cfg=self.norm_cfg,
conv_cfg=self.conv_cfg))
return nn.Sequential(*hr_modules), in_channels
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (_BatchNorm, nn.GroupNorm)):
constant_init(m, 1)
if self.zero_init_residual:
for m in self.modules():
if isinstance(m, Bottleneck):
constant_init(m.norm3, 0)
elif isinstance(m, BasicBlock):
constant_init(m.norm2, 0)
else:
raise TypeError('pretrained must be a str or None')
def forward(self, x):
x = self.conv1(x)
x = self.norm1(x)
x = self.relu(x)
x = self.conv2(x)
x = self.norm2(x)
x = self.relu(x)
x = self.layer1(x)
x_list = []
for i in range(self.stage2_cfg['num_branches']):
if self.transition1[i] is not None:
x_list.append(self.transition1[i](x))
else:
x_list.append(x)
y_list = self.stage2(x_list)
x_list = []
for i in range(self.stage3_cfg['num_branches']):
if self.transition2[i] is not None:
x_list.append(self.transition2[i](y_list[-1]))
else:
x_list.append(y_list[i])
y_list = self.stage3(x_list)
x_list = []
for i in range(self.stage4_cfg['num_branches']):
if self.transition3[i] is not None:
x_list.append(self.transition3[i](y_list[-1]))
else:
x_list.append(y_list[i])
y_list = self.stage4(x_list)
return y_list
def train(self, mode=True):
super(HRNet, self).train(mode)
if mode and self.norm_eval:
for m in self.modules():
# trick: eval have effect on BatchNorm only
if isinstance(m, _BatchNorm):
m.eval()
| 19,868
| 36.773764
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/backbones/resnet.py
|
import logging
import torch.nn as nn
import torch.utils.checkpoint as cp
from mmcv.cnn import constant_init, kaiming_init
from mmcv.runner import load_checkpoint
from torch.nn.modules.batchnorm import _BatchNorm
from mmdet.models.plugins import GeneralizedAttention
from mmdet.ops import ContextBlock, DeformConv, ModulatedDeformConv
from ..registry import BACKBONES
from ..utils import build_conv_layer, build_norm_layer
class BasicBlock(nn.Module):
expansion = 1
def __init__(self,
inplanes,
planes,
stride=1,
dilation=1,
downsample=None,
style='pytorch',
with_cp=False,
conv_cfg=None,
norm_cfg=dict(type='BN'),
dcn=None,
gcb=None,
gen_attention=None):
super(BasicBlock, self).__init__()
assert dcn is None, "Not implemented yet."
assert gen_attention is None, "Not implemented yet."
assert gcb is None, "Not implemented yet."
self.norm1_name, norm1 = build_norm_layer(norm_cfg, planes, postfix=1)
self.norm2_name, norm2 = build_norm_layer(norm_cfg, planes, postfix=2)
self.conv1 = build_conv_layer(
conv_cfg,
inplanes,
planes,
3,
stride=stride,
padding=dilation,
dilation=dilation,
bias=False)
self.add_module(self.norm1_name, norm1)
self.conv2 = build_conv_layer(
conv_cfg, planes, planes, 3, padding=1, bias=False)
self.add_module(self.norm2_name, norm2)
self.relu = nn.ReLU(inplace=True)
self.downsample = downsample
self.stride = stride
self.dilation = dilation
assert not with_cp
@property
def norm1(self):
return getattr(self, self.norm1_name)
@property
def norm2(self):
return getattr(self, self.norm2_name)
def forward(self, x):
identity = x
out = self.conv1(x)
out = self.norm1(out)
out = self.relu(out)
out = self.conv2(out)
out = self.norm2(out)
if self.downsample is not None:
identity = self.downsample(x)
out += identity
out = self.relu(out)
return out
class Bottleneck(nn.Module):
expansion = 4
def __init__(self,
inplanes,
planes,
stride=1,
dilation=1,
downsample=None,
style='pytorch',
with_cp=False,
conv_cfg=None,
norm_cfg=dict(type='BN'),
dcn=None,
gcb=None,
gen_attention=None):
"""Bottleneck block for ResNet.
If style is "pytorch", the stride-two layer is the 3x3 conv layer,
if it is "caffe", the stride-two layer is the first 1x1 conv layer.
"""
super(Bottleneck, self).__init__()
assert style in ['pytorch', 'caffe']
assert dcn is None or isinstance(dcn, dict)
assert gcb is None or isinstance(gcb, dict)
assert gen_attention is None or isinstance(gen_attention, dict)
self.inplanes = inplanes
self.planes = planes
self.stride = stride
self.dilation = dilation
self.style = style
self.with_cp = with_cp
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.dcn = dcn
self.with_dcn = dcn is not None
self.gcb = gcb
self.with_gcb = gcb is not None
self.gen_attention = gen_attention
self.with_gen_attention = gen_attention is not None
if self.style == 'pytorch':
self.conv1_stride = 1
self.conv2_stride = stride
else:
self.conv1_stride = stride
self.conv2_stride = 1
self.norm1_name, norm1 = build_norm_layer(norm_cfg, planes, postfix=1)
self.norm2_name, norm2 = build_norm_layer(norm_cfg, planes, postfix=2)
self.norm3_name, norm3 = build_norm_layer(
norm_cfg, planes * self.expansion, postfix=3)
self.conv1 = build_conv_layer(
conv_cfg,
inplanes,
planes,
kernel_size=1,
stride=self.conv1_stride,
bias=False)
self.add_module(self.norm1_name, norm1)
fallback_on_stride = False
self.with_modulated_dcn = False
if self.with_dcn:
fallback_on_stride = dcn.get('fallback_on_stride', False)
self.with_modulated_dcn = dcn.get('modulated', False)
if not self.with_dcn or fallback_on_stride:
self.conv2 = build_conv_layer(
conv_cfg,
planes,
planes,
kernel_size=3,
stride=self.conv2_stride,
padding=dilation,
dilation=dilation,
bias=False)
else:
assert conv_cfg is None, 'conv_cfg must be None for DCN'
self.deformable_groups = dcn.get('deformable_groups', 1)
if not self.with_modulated_dcn:
conv_op = DeformConv
offset_channels = 18
else:
conv_op = ModulatedDeformConv
offset_channels = 27
self.conv2_offset = nn.Conv2d(
planes,
self.deformable_groups * offset_channels,
kernel_size=3,
stride=self.conv2_stride,
padding=dilation,
dilation=dilation)
self.conv2 = conv_op(
planes,
planes,
kernel_size=3,
stride=self.conv2_stride,
padding=dilation,
dilation=dilation,
deformable_groups=self.deformable_groups,
bias=False)
self.add_module(self.norm2_name, norm2)
self.conv3 = build_conv_layer(
conv_cfg,
planes,
planes * self.expansion,
kernel_size=1,
bias=False)
self.add_module(self.norm3_name, norm3)
self.relu = nn.ReLU(inplace=True)
self.downsample = downsample
if self.with_gcb:
gcb_inplanes = planes * self.expansion
self.context_block = ContextBlock(inplanes=gcb_inplanes, **gcb)
# gen_attention
if self.with_gen_attention:
self.gen_attention_block = GeneralizedAttention(
planes, **gen_attention)
@property
def norm1(self):
return getattr(self, self.norm1_name)
@property
def norm2(self):
return getattr(self, self.norm2_name)
@property
def norm3(self):
return getattr(self, self.norm3_name)
def forward(self, x):
def _inner_forward(x):
identity = x
out = self.conv1(x)
out = self.norm1(out)
out = self.relu(out)
if not self.with_dcn:
out = self.conv2(out)
elif self.with_modulated_dcn:
offset_mask = self.conv2_offset(out)
offset = offset_mask[:, :18 * self.deformable_groups, :, :]
mask = offset_mask[:, -9 * self.deformable_groups:, :, :]
mask = mask.sigmoid()
out = self.conv2(out, offset, mask)
else:
offset = self.conv2_offset(out)
out = self.conv2(out, offset)
out = self.norm2(out)
out = self.relu(out)
if self.with_gen_attention:
out = self.gen_attention_block(out)
out = self.conv3(out)
out = self.norm3(out)
if self.with_gcb:
out = self.context_block(out)
if self.downsample is not None:
identity = self.downsample(x)
out += identity
return out
if self.with_cp and x.requires_grad:
out = cp.checkpoint(_inner_forward, x)
else:
out = _inner_forward(x)
out = self.relu(out)
return out
def make_res_layer(block,
inplanes,
planes,
blocks,
stride=1,
dilation=1,
style='pytorch',
with_cp=False,
conv_cfg=None,
norm_cfg=dict(type='BN'),
dcn=None,
gcb=None,
gen_attention=None,
gen_attention_blocks=[]):
downsample = None
if stride != 1 or inplanes != planes * block.expansion:
downsample = nn.Sequential(
build_conv_layer(
conv_cfg,
inplanes,
planes * block.expansion,
kernel_size=1,
stride=stride,
bias=False),
build_norm_layer(norm_cfg, planes * block.expansion)[1],
)
layers = []
layers.append(
block(
inplanes=inplanes,
planes=planes,
stride=stride,
dilation=dilation,
downsample=downsample,
style=style,
with_cp=with_cp,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
dcn=dcn,
gcb=gcb,
gen_attention=gen_attention if
(0 in gen_attention_blocks) else None))
inplanes = planes * block.expansion
for i in range(1, blocks):
layers.append(
block(
inplanes=inplanes,
planes=planes,
stride=1,
dilation=dilation,
style=style,
with_cp=with_cp,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
dcn=dcn,
gcb=gcb,
gen_attention=gen_attention if
(i in gen_attention_blocks) else None))
return nn.Sequential(*layers)
@BACKBONES.register_module
class ResNet(nn.Module):
"""ResNet backbone.
Args:
depth (int): Depth of resnet, from {18, 34, 50, 101, 152}.
in_channels (int): Number of input image channels. Normally 3.
num_stages (int): Resnet stages, normally 4.
strides (Sequence[int]): Strides of the first block of each stage.
dilations (Sequence[int]): Dilation of each stage.
out_indices (Sequence[int]): Output from which stages.
style (str): `pytorch` or `caffe`. If set to "pytorch", the stride-two
layer is the 3x3 conv layer, otherwise the stride-two layer is
the first 1x1 conv layer.
frozen_stages (int): Stages to be frozen (stop grad and set eval mode).
-1 means not freezing any parameters.
norm_cfg (dict): dictionary to construct and config norm layer.
norm_eval (bool): Whether to set norm layers to eval mode, namely,
freeze running stats (mean and var). Note: Effect on Batch Norm
and its variants only.
with_cp (bool): Use checkpoint or not. Using checkpoint will save some
memory while slowing down the training speed.
zero_init_residual (bool): whether to use zero init for last norm layer
in resblocks to let them behave as identity.
Example:
>>> from mmdet.models import ResNet
>>> import torch
>>> self = ResNet(depth=18)
>>> self.eval()
>>> inputs = torch.rand(1, 3, 32, 32)
>>> level_outputs = self.forward(inputs)
>>> for level_out in level_outputs:
... print(tuple(level_out.shape))
(1, 64, 8, 8)
(1, 128, 4, 4)
(1, 256, 2, 2)
(1, 512, 1, 1)
"""
arch_settings = {
18: (BasicBlock, (2, 2, 2, 2)),
34: (BasicBlock, (3, 4, 6, 3)),
50: (Bottleneck, (3, 4, 6, 3)),
101: (Bottleneck, (3, 4, 23, 3)),
152: (Bottleneck, (3, 8, 36, 3))
}
def __init__(self,
depth,
in_channels=3,
num_stages=4,
strides=(1, 2, 2, 2),
dilations=(1, 1, 1, 1),
out_indices=(0, 1, 2, 3),
style='pytorch',
frozen_stages=-1,
conv_cfg=None,
norm_cfg=dict(type='BN', requires_grad=True),
norm_eval=True,
dcn=None,
stage_with_dcn=(False, False, False, False),
gcb=None,
stage_with_gcb=(False, False, False, False),
gen_attention=None,
stage_with_gen_attention=((), (), (), ()),
with_cp=False,
zero_init_residual=True):
super(ResNet, self).__init__()
if depth not in self.arch_settings:
raise KeyError('invalid depth {} for resnet'.format(depth))
self.depth = depth
self.num_stages = num_stages
assert num_stages >= 1 and num_stages <= 4
self.strides = strides
self.dilations = dilations
assert len(strides) == len(dilations) == num_stages
self.out_indices = out_indices
assert max(out_indices) < num_stages
self.style = style
self.frozen_stages = frozen_stages
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.with_cp = with_cp
self.norm_eval = norm_eval
self.dcn = dcn
self.stage_with_dcn = stage_with_dcn
if dcn is not None:
assert len(stage_with_dcn) == num_stages
self.gen_attention = gen_attention
self.gcb = gcb
self.stage_with_gcb = stage_with_gcb
if gcb is not None:
assert len(stage_with_gcb) == num_stages
self.zero_init_residual = zero_init_residual
self.block, stage_blocks = self.arch_settings[depth]
self.stage_blocks = stage_blocks[:num_stages]
self.inplanes = 64
self._make_stem_layer(in_channels)
self.res_layers = []
for i, num_blocks in enumerate(self.stage_blocks):
stride = strides[i]
dilation = dilations[i]
dcn = self.dcn if self.stage_with_dcn[i] else None
gcb = self.gcb if self.stage_with_gcb[i] else None
planes = 64 * 2**i
res_layer = make_res_layer(
self.block,
self.inplanes,
planes,
num_blocks,
stride=stride,
dilation=dilation,
style=self.style,
with_cp=with_cp,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
dcn=dcn,
gcb=gcb,
gen_attention=gen_attention,
gen_attention_blocks=stage_with_gen_attention[i])
self.inplanes = planes * self.block.expansion
layer_name = 'layer{}'.format(i + 1)
self.add_module(layer_name, res_layer)
self.res_layers.append(layer_name)
self._freeze_stages()
self.feat_dim = self.block.expansion * 64 * 2**(
len(self.stage_blocks) - 1)
@property
def norm1(self):
return getattr(self, self.norm1_name)
def _make_stem_layer(self, in_channels):
self.conv1 = build_conv_layer(
self.conv_cfg,
in_channels,
64,
kernel_size=7,
stride=2,
padding=3,
bias=False)
self.norm1_name, norm1 = build_norm_layer(self.norm_cfg, 64, postfix=1)
self.add_module(self.norm1_name, norm1)
self.relu = nn.ReLU(inplace=True)
self.maxpool = nn.MaxPool2d(kernel_size=3, stride=2, padding=1)
def _freeze_stages(self):
if self.frozen_stages >= 0:
self.norm1.eval()
for m in [self.conv1, self.norm1]:
for param in m.parameters():
param.requires_grad = False
for i in range(1, self.frozen_stages + 1):
m = getattr(self, 'layer{}'.format(i))
m.eval()
for param in m.parameters():
param.requires_grad = False
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (_BatchNorm, nn.GroupNorm)):
constant_init(m, 1)
if self.dcn is not None:
for m in self.modules():
if isinstance(m, Bottleneck) and hasattr(
m, 'conv2_offset'):
constant_init(m.conv2_offset, 0)
if self.zero_init_residual:
for m in self.modules():
if isinstance(m, Bottleneck):
constant_init(m.norm3, 0)
elif isinstance(m, BasicBlock):
constant_init(m.norm2, 0)
else:
raise TypeError('pretrained must be a str or None')
def forward(self, x):
x = self.conv1(x)
x = self.norm1(x)
x = self.relu(x)
x = self.maxpool(x)
outs = []
for i, layer_name in enumerate(self.res_layers):
res_layer = getattr(self, layer_name)
x = res_layer(x)
if i in self.out_indices:
outs.append(x)
return tuple(outs)
def train(self, mode=True):
super(ResNet, self).train(mode)
self._freeze_stages()
if mode and self.norm_eval:
for m in self.modules():
# trick: eval have effect on BatchNorm only
if isinstance(m, _BatchNorm):
m.eval()
| 18,098
| 32.331492
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/backbones/ssd_vgg.py
|
import logging
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import VGG, constant_init, kaiming_init, normal_init, xavier_init
from mmcv.runner import load_checkpoint
from ..registry import BACKBONES
@BACKBONES.register_module
class SSDVGG(VGG):
"""VGG Backbone network for single-shot-detection
Args:
input_size (int): width and height of input, from {300, 512}.
depth (int): Depth of vgg, from {11, 13, 16, 19}.
out_indices (Sequence[int]): Output from which stages.
Example:
>>> self = SSDVGG(input_size=300, depth=11)
>>> self.eval()
>>> inputs = torch.rand(1, 3, 300, 300)
>>> level_outputs = self.forward(inputs)
>>> for level_out in level_outputs:
... print(tuple(level_out.shape))
(1, 1024, 19, 19)
(1, 512, 10, 10)
(1, 256, 5, 5)
(1, 256, 3, 3)
(1, 256, 1, 1)
"""
extra_setting = {
300: (256, 'S', 512, 128, 'S', 256, 128, 256, 128, 256),
512: (256, 'S', 512, 128, 'S', 256, 128, 'S', 256, 128, 'S', 256, 128),
}
def __init__(self,
input_size,
depth,
with_last_pool=False,
ceil_mode=True,
out_indices=(3, 4),
out_feature_indices=(22, 34),
l2_norm_scale=20.):
# TODO: in_channels for mmcv.VGG
super(SSDVGG, self).__init__(
depth,
with_last_pool=with_last_pool,
ceil_mode=ceil_mode,
out_indices=out_indices)
assert input_size in (300, 512)
self.input_size = input_size
self.features.add_module(
str(len(self.features)),
nn.MaxPool2d(kernel_size=3, stride=1, padding=1))
self.features.add_module(
str(len(self.features)),
nn.Conv2d(512, 1024, kernel_size=3, padding=6, dilation=6))
self.features.add_module(
str(len(self.features)), nn.ReLU(inplace=True))
self.features.add_module(
str(len(self.features)), nn.Conv2d(1024, 1024, kernel_size=1))
self.features.add_module(
str(len(self.features)), nn.ReLU(inplace=True))
self.out_feature_indices = out_feature_indices
self.inplanes = 1024
self.extra = self._make_extra_layers(self.extra_setting[input_size])
self.l2_norm = L2Norm(
self.features[out_feature_indices[0] - 1].out_channels,
l2_norm_scale)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.features.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
else:
raise TypeError('pretrained must be a str or None')
for m in self.extra.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform')
constant_init(self.l2_norm, self.l2_norm.scale)
def forward(self, x):
outs = []
for i, layer in enumerate(self.features):
x = layer(x)
# out_feature_indices是为了从SDDVGG输出特定层，out_indices是为了从VGG输出特定层
if i in self.out_feature_indices:
outs.append(x)
for i, layer in enumerate(self.extra):
x = F.relu(layer(x), inplace=True)
if i % 2 == 1:
outs.append(x)
outs[0] = self.l2_norm(outs[0])
if len(outs) == 1:
return outs[0]
else:
return tuple(outs)
def _make_extra_layers(self, outplanes):
layers = []
kernel_sizes = (1, 3)
num_layers = 0
outplane = None
for i in range(len(outplanes)):
if self.inplanes == 'S':
self.inplanes = outplane
continue
k = kernel_sizes[num_layers % 2]
if outplanes[i] == 'S':
outplane = outplanes[i + 1]
conv = nn.Conv2d(
self.inplanes, outplane, k, stride=2, padding=1)
else:
outplane = outplanes[i]
conv = nn.Conv2d(
self.inplanes, outplane, k, stride=1, padding=0)
layers.append(conv)
self.inplanes = outplanes[i]
num_layers += 1
if self.input_size == 512:
layers.append(nn.Conv2d(self.inplanes, 256, 4, padding=1))
return nn.Sequential(*layers)
class L2Norm(nn.Module):
def __init__(self, n_dims, scale=20., eps=1e-10):
super(L2Norm, self).__init__()
self.n_dims = n_dims
self.weight = nn.Parameter(torch.Tensor(self.n_dims))
self.eps = eps
self.scale = scale
def forward(self, x):
# normalization layer convert to FP32 in FP16 training
x_float = x.float()
norm = x_float.pow(2).sum(1, keepdim=True).sqrt() + self.eps
return (self.weight[None, :, None, None].float().expand_as(x_float) *
x_float / norm).type_as(x)
| 5,408
| 33.673077
| 79
|
py
|
s2anet
|
s2anet-master/mmdet/models/backbones/resnext.py
|
import math
import torch.nn as nn
from mmdet.ops import DeformConv, ModulatedDeformConv
from ..registry import BACKBONES
from ..utils import build_conv_layer, build_norm_layer
from .resnet import Bottleneck as _Bottleneck
from .resnet import ResNet
class Bottleneck(_Bottleneck):
def __init__(self, inplanes, planes, groups=1, base_width=4, **kwargs):
"""Bottleneck block for ResNeXt.
If style is "pytorch", the stride-two layer is the 3x3 conv layer,
if it is "caffe", the stride-two layer is the first 1x1 conv layer.
"""
super(Bottleneck, self).__init__(inplanes, planes, **kwargs)
if groups == 1:
width = self.planes
else:
width = math.floor(self.planes * (base_width / 64)) * groups
self.norm1_name, norm1 = build_norm_layer(
self.norm_cfg, width, postfix=1)
self.norm2_name, norm2 = build_norm_layer(
self.norm_cfg, width, postfix=2)
self.norm3_name, norm3 = build_norm_layer(
self.norm_cfg, self.planes * self.expansion, postfix=3)
self.conv1 = build_conv_layer(
self.conv_cfg,
self.inplanes,
width,
kernel_size=1,
stride=self.conv1_stride,
bias=False)
self.add_module(self.norm1_name, norm1)
fallback_on_stride = False
self.with_modulated_dcn = False
if self.with_dcn:
fallback_on_stride = self.dcn.get('fallback_on_stride', False)
self.with_modulated_dcn = self.dcn.get('modulated', False)
if not self.with_dcn or fallback_on_stride:
self.conv2 = build_conv_layer(
self.conv_cfg,
width,
width,
kernel_size=3,
stride=self.conv2_stride,
padding=self.dilation,
dilation=self.dilation,
groups=groups,
bias=False)
else:
assert self.conv_cfg is None, 'conv_cfg must be None for DCN'
groups = self.dcn.get('groups', 1)
deformable_groups = self.dcn.get('deformable_groups', 1)
if not self.with_modulated_dcn:
conv_op = DeformConv
offset_channels = 18
else:
conv_op = ModulatedDeformConv
offset_channels = 27
self.conv2_offset = nn.Conv2d(
width,
deformable_groups * offset_channels,
kernel_size=3,
stride=self.conv2_stride,
padding=self.dilation,
dilation=self.dilation)
self.conv2 = conv_op(
width,
width,
kernel_size=3,
stride=self.conv2_stride,
padding=self.dilation,
dilation=self.dilation,
groups=groups,
deformable_groups=deformable_groups,
bias=False)
self.add_module(self.norm2_name, norm2)
self.conv3 = build_conv_layer(
self.conv_cfg,
width,
self.planes * self.expansion,
kernel_size=1,
bias=False)
self.add_module(self.norm3_name, norm3)
def make_res_layer(block,
inplanes,
planes,
blocks,
stride=1,
dilation=1,
groups=1,
base_width=4,
style='pytorch',
with_cp=False,
conv_cfg=None,
norm_cfg=dict(type='BN'),
dcn=None,
gcb=None):
downsample = None
if stride != 1 or inplanes != planes * block.expansion:
downsample = nn.Sequential(
build_conv_layer(
conv_cfg,
inplanes,
planes * block.expansion,
kernel_size=1,
stride=stride,
bias=False),
build_norm_layer(norm_cfg, planes * block.expansion)[1],
)
layers = []
layers.append(
block(
inplanes=inplanes,
planes=planes,
stride=stride,
dilation=dilation,
downsample=downsample,
groups=groups,
base_width=base_width,
style=style,
with_cp=with_cp,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
dcn=dcn,
gcb=gcb))
inplanes = planes * block.expansion
for i in range(1, blocks):
layers.append(
block(
inplanes=inplanes,
planes=planes,
stride=1,
dilation=dilation,
groups=groups,
base_width=base_width,
style=style,
with_cp=with_cp,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
dcn=dcn,
gcb=gcb))
return nn.Sequential(*layers)
@BACKBONES.register_module
class ResNeXt(ResNet):
"""ResNeXt backbone.
Args:
depth (int): Depth of resnet, from {18, 34, 50, 101, 152}.
in_channels (int): Number of input image channels. Normally 3.
num_stages (int): Resnet stages, normally 4.
groups (int): Group of resnext.
base_width (int): Base width of resnext.
strides (Sequence[int]): Strides of the first block of each stage.
dilations (Sequence[int]): Dilation of each stage.
out_indices (Sequence[int]): Output from which stages.
style (str): `pytorch` or `caffe`. If set to "pytorch", the stride-two
layer is the 3x3 conv layer, otherwise the stride-two layer is
the first 1x1 conv layer.
frozen_stages (int): Stages to be frozen (all param fixed). -1 means
not freezing any parameters.
norm_cfg (dict): dictionary to construct and config norm layer.
norm_eval (bool): Whether to set norm layers to eval mode, namely,
freeze running stats (mean and var). Note: Effect on Batch Norm
and its variants only.
with_cp (bool): Use checkpoint or not. Using checkpoint will save some
memory while slowing down the training speed.
zero_init_residual (bool): whether to use zero init for last norm layer
in resblocks to let them behave as identity.
Example:
>>> from mmdet.models import ResNeXt
>>> import torch
>>> self = ResNeXt(depth=50)
>>> self.eval()
>>> inputs = torch.rand(1, 3, 32, 32)
>>> level_outputs = self.forward(inputs)
>>> for level_out in level_outputs:
... print(tuple(level_out.shape))
(1, 256, 8, 8)
(1, 512, 4, 4)
(1, 1024, 2, 2)
(1, 2048, 1, 1)
"""
arch_settings = {
50: (Bottleneck, (3, 4, 6, 3)),
101: (Bottleneck, (3, 4, 23, 3)),
152: (Bottleneck, (3, 8, 36, 3))
}
def __init__(self, groups=1, base_width=4, **kwargs):
super(ResNeXt, self).__init__(**kwargs)
self.groups = groups
self.base_width = base_width
self.inplanes = 64
self.res_layers = []
for i, num_blocks in enumerate(self.stage_blocks):
stride = self.strides[i]
dilation = self.dilations[i]
dcn = self.dcn if self.stage_with_dcn[i] else None
gcb = self.gcb if self.stage_with_gcb[i] else None
planes = 64 * 2**i
res_layer = make_res_layer(
self.block,
self.inplanes,
planes,
num_blocks,
stride=stride,
dilation=dilation,
groups=self.groups,
base_width=self.base_width,
style=self.style,
with_cp=self.with_cp,
conv_cfg=self.conv_cfg,
norm_cfg=self.norm_cfg,
dcn=dcn,
gcb=gcb)
self.inplanes = planes * self.block.expansion
layer_name = 'layer{}'.format(i + 1)
self.add_module(layer_name, res_layer)
self.res_layers.append(layer_name)
self._freeze_stages()
| 8,336
| 33.882845
| 79
|
py
|
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