Upload edit\Qwen3-TTS-test\.venv\Lib\site-packages\transformers\models\groupvit\modeling_tf_groupvit.py with huggingface_hub
Browse files
edit//Qwen3-TTS-test//.venv//Lib//site-packages//transformers//models//groupvit//modeling_tf_groupvit.py
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|
| 1 |
+
# coding=utf-8
|
| 2 |
+
# Copyright 2022 NVIDIA and The HuggingFace Team. All rights reserved.
|
| 3 |
+
#
|
| 4 |
+
# Licensed under the Apache License, Version 2.0 (the "License");
|
| 5 |
+
# you may not use this file except in compliance with the License.
|
| 6 |
+
# You may obtain a copy of the License at
|
| 7 |
+
#
|
| 8 |
+
# http://www.apache.org/licenses/LICENSE-2.0
|
| 9 |
+
#
|
| 10 |
+
# Unless required by applicable law or agreed to in writing, software
|
| 11 |
+
# distributed under the License is distributed on an "AS IS" BASIS,
|
| 12 |
+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
| 13 |
+
# See the License for the specific language governing permissions and
|
| 14 |
+
# limitations under the License.
|
| 15 |
+
"""TF 2.0 GroupViT model."""
|
| 16 |
+
|
| 17 |
+
from __future__ import annotations
|
| 18 |
+
|
| 19 |
+
import collections.abc
|
| 20 |
+
import math
|
| 21 |
+
from dataclasses import dataclass
|
| 22 |
+
from typing import Any
|
| 23 |
+
|
| 24 |
+
import numpy as np
|
| 25 |
+
import tensorflow as tf
|
| 26 |
+
|
| 27 |
+
from ...activations_tf import get_tf_activation
|
| 28 |
+
from ...modeling_tf_outputs import TFBaseModelOutput, TFBaseModelOutputWithPooling
|
| 29 |
+
from ...modeling_tf_utils import (
|
| 30 |
+
TFModelInputType,
|
| 31 |
+
TFPreTrainedModel,
|
| 32 |
+
get_initializer,
|
| 33 |
+
keras,
|
| 34 |
+
keras_serializable,
|
| 35 |
+
unpack_inputs,
|
| 36 |
+
)
|
| 37 |
+
from ...tf_utils import check_embeddings_within_bounds, shape_list, stable_softmax
|
| 38 |
+
from ...utils import (
|
| 39 |
+
ModelOutput,
|
| 40 |
+
add_start_docstrings,
|
| 41 |
+
add_start_docstrings_to_model_forward,
|
| 42 |
+
is_tensorflow_probability_available,
|
| 43 |
+
logging,
|
| 44 |
+
replace_return_docstrings,
|
| 45 |
+
)
|
| 46 |
+
from .configuration_groupvit import GroupViTConfig, GroupViTTextConfig, GroupViTVisionConfig
|
| 47 |
+
|
| 48 |
+
|
| 49 |
+
logger = logging.get_logger(__name__)
|
| 50 |
+
|
| 51 |
+
# soft dependency
|
| 52 |
+
if is_tensorflow_probability_available():
|
| 53 |
+
try:
|
| 54 |
+
import tensorflow_probability as tfp
|
| 55 |
+
|
| 56 |
+
# On the first call, check whether a compatible version of TensorFlow is installed
|
| 57 |
+
# TensorFlow Probability depends on a recent stable release of TensorFlow
|
| 58 |
+
_ = tfp.distributions.Normal(loc=0.0, scale=1.0)
|
| 59 |
+
except ImportError:
|
| 60 |
+
logger.error(
|
| 61 |
+
"GroupViT models are not usable since `tensorflow_probability` can't be loaded. "
|
| 62 |
+
"It seems you have `tensorflow_probability` installed with the wrong tensorflow version."
|
| 63 |
+
"Please try to reinstall it following the instructions here: https://github.com/tensorflow/probability."
|
| 64 |
+
)
|
| 65 |
+
else:
|
| 66 |
+
try:
|
| 67 |
+
import tensorflow_probability as tfp
|
| 68 |
+
|
| 69 |
+
# On the first call, check whether a compatible version of TensorFlow is installed
|
| 70 |
+
# TensorFlow Probability depends on a recent stable release of TensorFlow
|
| 71 |
+
_ = tfp.distributions.Normal(loc=0.0, scale=1.0)
|
| 72 |
+
except ImportError:
|
| 73 |
+
pass
|
| 74 |
+
|
| 75 |
+
_CHECKPOINT_FOR_DOC = "nvidia/groupvit-gcc-yfcc"
|
| 76 |
+
|
| 77 |
+
|
| 78 |
+
LARGE_NEGATIVE = -1e8
|
| 79 |
+
|
| 80 |
+
|
| 81 |
+
# Copied from transformers.models.bart.modeling_tf_bart._expand_mask
|
| 82 |
+
def _expand_mask(mask: tf.Tensor, tgt_len: int | None = None):
|
| 83 |
+
"""
|
| 84 |
+
Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
|
| 85 |
+
"""
|
| 86 |
+
src_len = shape_list(mask)[1]
|
| 87 |
+
tgt_len = tgt_len if tgt_len is not None else src_len
|
| 88 |
+
one_cst = tf.constant(1.0)
|
| 89 |
+
mask = tf.cast(mask, dtype=one_cst.dtype)
|
| 90 |
+
expanded_mask = tf.tile(mask[:, None, None, :], (1, 1, tgt_len, 1))
|
| 91 |
+
|
| 92 |
+
return (one_cst - expanded_mask) * LARGE_NEGATIVE
|
| 93 |
+
|
| 94 |
+
|
| 95 |
+
# contrastive loss function, adapted from
|
| 96 |
+
# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIP.html
|
| 97 |
+
def contrastive_loss(logits: tf.Tensor) -> tf.Tensor:
|
| 98 |
+
return tf.math.reduce_mean(
|
| 99 |
+
keras.metrics.sparse_categorical_crossentropy(
|
| 100 |
+
y_true=tf.range(shape_list(logits)[0]), y_pred=logits, from_logits=True
|
| 101 |
+
)
|
| 102 |
+
)
|
| 103 |
+
|
| 104 |
+
|
| 105 |
+
# Copied from transformers.models.clip.modeling_tf_clip.clip_loss with clip->groupvit
|
| 106 |
+
def groupvit_loss(similarity: tf.Tensor) -> tf.Tensor:
|
| 107 |
+
caption_loss = contrastive_loss(similarity)
|
| 108 |
+
image_loss = contrastive_loss(tf.transpose(similarity))
|
| 109 |
+
return (caption_loss + image_loss) / 2.0
|
| 110 |
+
|
| 111 |
+
|
| 112 |
+
def hard_softmax(logits: tf.Tensor, dim: int) -> tf.Tensor:
|
| 113 |
+
y_soft = stable_softmax(logits, dim)
|
| 114 |
+
# Straight through.
|
| 115 |
+
index = tf.argmax(y_soft, dim)
|
| 116 |
+
y_hard = tf.one_hot(
|
| 117 |
+
index,
|
| 118 |
+
depth=shape_list(logits)[dim],
|
| 119 |
+
# TensorFlow expects axis to be -1 or between [0, 3). But received: -2
|
| 120 |
+
# This is why the following code snippet is used.
|
| 121 |
+
axis=range(len(shape_list(logits)))[dim],
|
| 122 |
+
dtype=y_soft.dtype,
|
| 123 |
+
)
|
| 124 |
+
ret = y_hard - tf.stop_gradient(y_soft) + y_soft
|
| 125 |
+
|
| 126 |
+
return ret
|
| 127 |
+
|
| 128 |
+
|
| 129 |
+
def gumbel_softmax(logits: tf.Tensor, tau: float = 1, hard: bool = False, dim: int = -1) -> tf.Tensor:
|
| 130 |
+
gumbel_dist = tfp.distributions.Gumbel(0.0, 1.0)
|
| 131 |
+
gumbels = gumbel_dist.sample(tf.shape(logits), dtype=logits.dtype)
|
| 132 |
+
|
| 133 |
+
gumbels = (logits + gumbels) / tau # ~Gumbel(logits,tau)
|
| 134 |
+
y_soft = stable_softmax(gumbels, dim)
|
| 135 |
+
|
| 136 |
+
if hard:
|
| 137 |
+
# Straight through.
|
| 138 |
+
index = tf.argmax(y_soft, dim)
|
| 139 |
+
y_hard = tf.one_hot(
|
| 140 |
+
index,
|
| 141 |
+
depth=shape_list(logits)[dim],
|
| 142 |
+
# TensorFlow expects axis to be -1 or between [0, 3). But received: -2
|
| 143 |
+
# This is why the following code snippet is used.
|
| 144 |
+
axis=range(len(shape_list(logits)))[dim],
|
| 145 |
+
dtype=y_soft.dtype,
|
| 146 |
+
)
|
| 147 |
+
ret = y_hard - tf.stop_gradient(y_soft) + y_soft
|
| 148 |
+
else:
|
| 149 |
+
# Reparametrization trick.
|
| 150 |
+
ret = y_soft
|
| 151 |
+
return ret
|
| 152 |
+
|
| 153 |
+
|
| 154 |
+
def resize_attention_map(attentions: tf.Tensor, height: int, width: int, align_corners: bool = False) -> tf.Tensor:
|
| 155 |
+
"""
|
| 156 |
+
Args:
|
| 157 |
+
attentions (`tf.Tensor`): attention map of shape [batch_size, groups, feat_height*feat_width]
|
| 158 |
+
height (`int`): height of the output attention map
|
| 159 |
+
width (`int`): width of the output attention map
|
| 160 |
+
align_corners (`bool`, *optional*): the `align_corner` argument for `nn.functional.interpolate`.
|
| 161 |
+
|
| 162 |
+
Returns:
|
| 163 |
+
`tf.Tensor`: resized attention map of shape [batch_size, groups, height, width]
|
| 164 |
+
"""
|
| 165 |
+
|
| 166 |
+
scale = (height * width // attentions.shape[2]) ** 0.5
|
| 167 |
+
if height > width:
|
| 168 |
+
feat_width = int(np.round(width / scale))
|
| 169 |
+
feat_height = shape_list(attentions)[2] // feat_width
|
| 170 |
+
else:
|
| 171 |
+
feat_height = int(np.round(height / scale))
|
| 172 |
+
feat_width = shape_list(attentions)[2] // feat_height
|
| 173 |
+
|
| 174 |
+
batch_size = shape_list(attentions)[0]
|
| 175 |
+
groups = shape_list(attentions)[1] # number of group token
|
| 176 |
+
# [batch_size, groups, height x width, groups] -> [batch_size, groups, height, width]
|
| 177 |
+
attentions = tf.reshape(attentions, (batch_size, groups, feat_height, feat_width))
|
| 178 |
+
attentions = tf.transpose(attentions, perm=(0, 2, 3, 1))
|
| 179 |
+
if align_corners:
|
| 180 |
+
attentions = tf.compat.v1.image.resize(
|
| 181 |
+
attentions,
|
| 182 |
+
size=(height, width),
|
| 183 |
+
method="bilinear",
|
| 184 |
+
align_corners=align_corners,
|
| 185 |
+
)
|
| 186 |
+
else:
|
| 187 |
+
attentions = tf.image.resize(attentions, size=(height, width), method="bilinear")
|
| 188 |
+
attentions = tf.transpose(attentions, perm=(0, 3, 1, 2))
|
| 189 |
+
return attentions
|
| 190 |
+
|
| 191 |
+
|
| 192 |
+
def get_grouping_from_attentions(attentions: tuple[tf.Tensor], hw_shape: tuple[int]) -> tf.Tensor:
|
| 193 |
+
"""
|
| 194 |
+
Args:
|
| 195 |
+
attentions (`tuple(tf.Tensor)`: tuple of attention maps returned by `TFGroupViTVisionTransformer`
|
| 196 |
+
hw_shape (`tuple(int)`): height and width of the output attention map
|
| 197 |
+
Returns:
|
| 198 |
+
`tf.Tensor`: the attention map of shape [batch_size, groups, height, width]
|
| 199 |
+
"""
|
| 200 |
+
|
| 201 |
+
attn_maps = []
|
| 202 |
+
prev_attn_masks = None
|
| 203 |
+
for attn_masks in attentions:
|
| 204 |
+
# [batch_size, num_groups, height x width] -> [batch_size, height x width, num_groups]
|
| 205 |
+
attn_masks = tf.transpose(attn_masks, perm=(0, 2, 1))
|
| 206 |
+
if prev_attn_masks is None:
|
| 207 |
+
prev_attn_masks = attn_masks
|
| 208 |
+
else:
|
| 209 |
+
prev_attn_masks = tf.matmul(prev_attn_masks, attn_masks)
|
| 210 |
+
# [batch_size, height x width, num_groups] -> [batch_size, num_groups, height x width] -> [batch_size, num_groups, height, width]
|
| 211 |
+
cur_attn_map = resize_attention_map(tf.transpose(prev_attn_masks, perm=(0, 2, 1)), *hw_shape)
|
| 212 |
+
attn_maps.append(cur_attn_map)
|
| 213 |
+
|
| 214 |
+
# [batch_size, num_groups, height, width]
|
| 215 |
+
final_grouping = attn_maps[-1]
|
| 216 |
+
|
| 217 |
+
return tf.stop_gradient(final_grouping)
|
| 218 |
+
|
| 219 |
+
|
| 220 |
+
@dataclass
|
| 221 |
+
class TFGroupViTModelOutput(ModelOutput):
|
| 222 |
+
"""
|
| 223 |
+
Args:
|
| 224 |
+
loss (`tf.Tensor` of shape `(1,)`, *optional*, returned when `return_loss` is `True`):
|
| 225 |
+
Contrastive loss for image-text similarity.
|
| 226 |
+
logits_per_image (`tf.Tensor` of shape `(image_batch_size, text_batch_size)`):
|
| 227 |
+
The scaled dot product scores between `image_embeds` and `text_embeds`. This represents the image-text
|
| 228 |
+
similarity scores.
|
| 229 |
+
logits_per_text (`tf.Tensor` of shape `(text_batch_size, image_batch_size)`):
|
| 230 |
+
The scaled dot product scores between `text_embeds` and `image_embeds`. This represents the text-image
|
| 231 |
+
similarity scores.
|
| 232 |
+
segmentation_logits (`tf.Tensor` of shape `(batch_size, config.num_labels, logits_height, logits_width)`):
|
| 233 |
+
Classification scores for each pixel.
|
| 234 |
+
|
| 235 |
+
<Tip warning={true}>
|
| 236 |
+
|
| 237 |
+
The logits returned do not necessarily have the same size as the `pixel_values` passed as inputs. This is
|
| 238 |
+
to avoid doing two interpolations and lose some quality when a user needs to resize the logits to the
|
| 239 |
+
original image size as post-processing. You should always check your logits shape and resize as needed.
|
| 240 |
+
|
| 241 |
+
</Tip>
|
| 242 |
+
|
| 243 |
+
text_embeds (`tf.Tensor` of shape `(batch_size, output_dim`):
|
| 244 |
+
The text embeddings obtained by applying the projection layer to the pooled output of
|
| 245 |
+
[`TFGroupViTTextModel`].
|
| 246 |
+
image_embeds (`tf.Tensor` of shape `(batch_size, output_dim`):
|
| 247 |
+
The image embeddings obtained by applying the projection layer to the pooled output of
|
| 248 |
+
[`TFGroupViTVisionModel`].
|
| 249 |
+
text_model_output (`TFBaseModelOutputWithPooling`):
|
| 250 |
+
The output of the [`TFGroupViTTextModel`].
|
| 251 |
+
vision_model_output (`TFBaseModelOutputWithPooling`):
|
| 252 |
+
The output of the [`TFGroupViTVisionModel`].
|
| 253 |
+
"""
|
| 254 |
+
|
| 255 |
+
loss: tf.Tensor | None = None
|
| 256 |
+
logits_per_image: tf.Tensor | None = None
|
| 257 |
+
logits_per_text: tf.Tensor | None = None
|
| 258 |
+
segmentation_logits: tf.Tensor | None = None
|
| 259 |
+
text_embeds: tf.Tensor | None = None
|
| 260 |
+
image_embeds: tf.Tensor | None = None
|
| 261 |
+
text_model_output: TFBaseModelOutputWithPooling = None
|
| 262 |
+
vision_model_output: TFBaseModelOutputWithPooling = None
|
| 263 |
+
|
| 264 |
+
def to_tuple(self) -> tuple[Any]:
|
| 265 |
+
return tuple(
|
| 266 |
+
self[k] if k not in ["text_model_output", "vision_model_output"] else getattr(self, k).to_tuple()
|
| 267 |
+
for k in self.keys()
|
| 268 |
+
)
|
| 269 |
+
|
| 270 |
+
|
| 271 |
+
class TFGroupViTCrossAttentionLayer(keras.layers.Layer):
|
| 272 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs):
|
| 273 |
+
super().__init__(**kwargs)
|
| 274 |
+
self.attn = TFGroupViTAttention(config, name="attn")
|
| 275 |
+
self.norm2 = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm2")
|
| 276 |
+
self.mlp = TFGroupViTMLP(config, name="mlp")
|
| 277 |
+
self.norm_post = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm_post")
|
| 278 |
+
self.config = config
|
| 279 |
+
|
| 280 |
+
def call(self, query: tf.Tensor, key: tf.Tensor, training: bool = False) -> tf.Tensor:
|
| 281 |
+
x = query
|
| 282 |
+
x = x + self.attn(query, encoder_hidden_states=key)[0]
|
| 283 |
+
x = x + self.mlp(self.norm2(x))
|
| 284 |
+
x = self.norm_post(x)
|
| 285 |
+
return x
|
| 286 |
+
|
| 287 |
+
def build(self, input_shape=None):
|
| 288 |
+
if self.built:
|
| 289 |
+
return
|
| 290 |
+
self.built = True
|
| 291 |
+
if getattr(self, "attn", None) is not None:
|
| 292 |
+
with tf.name_scope(self.attn.name):
|
| 293 |
+
self.attn.build(None)
|
| 294 |
+
if getattr(self, "norm2", None) is not None:
|
| 295 |
+
with tf.name_scope(self.norm2.name):
|
| 296 |
+
self.norm2.build([None, None, self.config.hidden_size])
|
| 297 |
+
if getattr(self, "mlp", None) is not None:
|
| 298 |
+
with tf.name_scope(self.mlp.name):
|
| 299 |
+
self.mlp.build(None)
|
| 300 |
+
if getattr(self, "norm_post", None) is not None:
|
| 301 |
+
with tf.name_scope(self.norm_post.name):
|
| 302 |
+
self.norm_post.build([None, None, self.config.hidden_size])
|
| 303 |
+
|
| 304 |
+
|
| 305 |
+
class TFGroupViTAssignAttention(keras.layers.Layer):
|
| 306 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs):
|
| 307 |
+
super().__init__(**kwargs)
|
| 308 |
+
self.scale = config.hidden_size**-0.5
|
| 309 |
+
|
| 310 |
+
self.q_proj = keras.layers.Dense(config.hidden_size, name="q_proj")
|
| 311 |
+
self.k_proj = keras.layers.Dense(config.hidden_size, name="k_proj")
|
| 312 |
+
self.v_proj = keras.layers.Dense(config.hidden_size, name="v_proj")
|
| 313 |
+
self.proj = keras.layers.Dense(config.hidden_size, name="proj")
|
| 314 |
+
self.assign_eps = config.assign_eps
|
| 315 |
+
self.config = config
|
| 316 |
+
|
| 317 |
+
def get_attn(self, attn: tf.Tensor, gumbel: bool = True, hard: bool = True, training: bool = False) -> tf.Tensor:
|
| 318 |
+
if gumbel and training:
|
| 319 |
+
attn = gumbel_softmax(attn, dim=-2, hard=hard)
|
| 320 |
+
else:
|
| 321 |
+
if hard:
|
| 322 |
+
attn = hard_softmax(attn, dim=-2)
|
| 323 |
+
else:
|
| 324 |
+
attn = stable_softmax(attn, axis=-2)
|
| 325 |
+
|
| 326 |
+
return attn
|
| 327 |
+
|
| 328 |
+
def call(self, query: tf.Tensor, key: tf.Tensor, training: bool = False):
|
| 329 |
+
value = key
|
| 330 |
+
# [batch_size, query_length, channels]
|
| 331 |
+
query = self.q_proj(query)
|
| 332 |
+
|
| 333 |
+
# [batch_size, key_length, channels]
|
| 334 |
+
key = self.k_proj(key)
|
| 335 |
+
|
| 336 |
+
# [batch_size, key_length, channels]
|
| 337 |
+
value = self.v_proj(value)
|
| 338 |
+
|
| 339 |
+
# [batch_size, query_length, key_length]
|
| 340 |
+
raw_attn = tf.matmul(query, key, transpose_b=True) * self.scale
|
| 341 |
+
|
| 342 |
+
attn = self.get_attn(raw_attn, training=training)
|
| 343 |
+
soft_attn = self.get_attn(raw_attn, training=training, gumbel=False, hard=False)
|
| 344 |
+
|
| 345 |
+
attn = attn / (tf.math.reduce_sum(attn, axis=-1, keepdims=True) + self.assign_eps)
|
| 346 |
+
|
| 347 |
+
out = tf.matmul(attn, value)
|
| 348 |
+
|
| 349 |
+
out = self.proj(out)
|
| 350 |
+
|
| 351 |
+
return out, soft_attn
|
| 352 |
+
|
| 353 |
+
def build(self, input_shape=None):
|
| 354 |
+
if self.built:
|
| 355 |
+
return
|
| 356 |
+
self.built = True
|
| 357 |
+
if getattr(self, "q_proj", None) is not None:
|
| 358 |
+
with tf.name_scope(self.q_proj.name):
|
| 359 |
+
self.q_proj.build([None, None, self.config.hidden_size])
|
| 360 |
+
if getattr(self, "k_proj", None) is not None:
|
| 361 |
+
with tf.name_scope(self.k_proj.name):
|
| 362 |
+
self.k_proj.build([None, None, self.config.hidden_size])
|
| 363 |
+
if getattr(self, "v_proj", None) is not None:
|
| 364 |
+
with tf.name_scope(self.v_proj.name):
|
| 365 |
+
self.v_proj.build([None, None, self.config.hidden_size])
|
| 366 |
+
if getattr(self, "proj", None) is not None:
|
| 367 |
+
with tf.name_scope(self.proj.name):
|
| 368 |
+
self.proj.build([None, None, self.config.hidden_size])
|
| 369 |
+
|
| 370 |
+
|
| 371 |
+
class TFGroupViTTokenAssign(keras.layers.Layer):
|
| 372 |
+
def __init__(self, config: GroupViTVisionConfig, num_group_token: int, num_output_group: int, **kwargs):
|
| 373 |
+
super().__init__(**kwargs)
|
| 374 |
+
self.num_output_group = num_output_group
|
| 375 |
+
# norm on group_tokens
|
| 376 |
+
self.norm_tokens = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm_tokens")
|
| 377 |
+
assign_mlp_ratio = (
|
| 378 |
+
config.assign_mlp_ratio
|
| 379 |
+
if isinstance(config.assign_mlp_ratio, collections.abc.Iterable)
|
| 380 |
+
else (config.assign_mlp_ratio, config.assign_mlp_ratio)
|
| 381 |
+
)
|
| 382 |
+
tokens_dim, channels_dim = [int(x * config.hidden_size) for x in assign_mlp_ratio]
|
| 383 |
+
self.mlp_inter = TFGroupViTMixerMLP(config, num_group_token, tokens_dim, num_output_group, name="mlp_inter")
|
| 384 |
+
self.norm_post_tokens = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm_post_tokens")
|
| 385 |
+
# norm on x
|
| 386 |
+
self.norm_x = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm_x")
|
| 387 |
+
self.pre_assign_attn = TFGroupViTCrossAttentionLayer(config, name="pre_assign_attn")
|
| 388 |
+
|
| 389 |
+
self.assign = TFGroupViTAssignAttention(config, name="assign")
|
| 390 |
+
self.norm_new_x = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="norm_new_x")
|
| 391 |
+
self.mlp_channels = TFGroupViTMLP(
|
| 392 |
+
config, config.hidden_size, channels_dim, config.hidden_size, name="mlp_channels"
|
| 393 |
+
)
|
| 394 |
+
self.config = config
|
| 395 |
+
|
| 396 |
+
def project_group_token(self, group_tokens: tf.Tensor) -> tf.Tensor:
|
| 397 |
+
"""
|
| 398 |
+
Args:
|
| 399 |
+
group_tokens (tf.Tensor): group tokens, [batch_size, num_group_tokens, channels]
|
| 400 |
+
|
| 401 |
+
Returns:
|
| 402 |
+
projected_group_tokens (tf.Tensor): [batch_size, num_output_groups, channels]
|
| 403 |
+
"""
|
| 404 |
+
# [B, num_output_groups, C] <- [B, num_group_tokens, C]
|
| 405 |
+
projected_group_tokens = self.mlp_inter(group_tokens)
|
| 406 |
+
projected_group_tokens = self.norm_post_tokens(projected_group_tokens)
|
| 407 |
+
return projected_group_tokens
|
| 408 |
+
|
| 409 |
+
def call(self, image_tokens: tf.Tensor, group_tokens: tf.Tensor, training: bool = False):
|
| 410 |
+
"""
|
| 411 |
+
Args:
|
| 412 |
+
image_tokens (`tf.Tensor`): image tokens, of shape [batch_size, input_length, channels]
|
| 413 |
+
group_tokens (`tf.Tensor`): group tokens, [batch_size, num_group_tokens, channels]
|
| 414 |
+
"""
|
| 415 |
+
|
| 416 |
+
group_tokens = self.norm_tokens(group_tokens)
|
| 417 |
+
image_tokens = self.norm_x(image_tokens)
|
| 418 |
+
# [batch_size, num_output_groups, channels]
|
| 419 |
+
projected_group_tokens = self.project_group_token(group_tokens)
|
| 420 |
+
projected_group_tokens = self.pre_assign_attn(projected_group_tokens, image_tokens)
|
| 421 |
+
new_image_tokens, attention = self.assign(projected_group_tokens, image_tokens)
|
| 422 |
+
new_image_tokens += projected_group_tokens
|
| 423 |
+
|
| 424 |
+
new_image_tokens = new_image_tokens + self.mlp_channels(self.norm_new_x(new_image_tokens))
|
| 425 |
+
|
| 426 |
+
return new_image_tokens, attention
|
| 427 |
+
|
| 428 |
+
def build(self, input_shape=None):
|
| 429 |
+
if self.built:
|
| 430 |
+
return
|
| 431 |
+
self.built = True
|
| 432 |
+
if getattr(self, "norm_tokens", None) is not None:
|
| 433 |
+
with tf.name_scope(self.norm_tokens.name):
|
| 434 |
+
self.norm_tokens.build([None, None, self.config.hidden_size])
|
| 435 |
+
if getattr(self, "mlp_inter", None) is not None:
|
| 436 |
+
with tf.name_scope(self.mlp_inter.name):
|
| 437 |
+
self.mlp_inter.build(None)
|
| 438 |
+
if getattr(self, "norm_post_tokens", None) is not None:
|
| 439 |
+
with tf.name_scope(self.norm_post_tokens.name):
|
| 440 |
+
self.norm_post_tokens.build([None, None, self.config.hidden_size])
|
| 441 |
+
if getattr(self, "norm_x", None) is not None:
|
| 442 |
+
with tf.name_scope(self.norm_x.name):
|
| 443 |
+
self.norm_x.build([None, None, self.config.hidden_size])
|
| 444 |
+
if getattr(self, "pre_assign_attn", None) is not None:
|
| 445 |
+
with tf.name_scope(self.pre_assign_attn.name):
|
| 446 |
+
self.pre_assign_attn.build(None)
|
| 447 |
+
if getattr(self, "assign", None) is not None:
|
| 448 |
+
with tf.name_scope(self.assign.name):
|
| 449 |
+
self.assign.build(None)
|
| 450 |
+
if getattr(self, "norm_new_x", None) is not None:
|
| 451 |
+
with tf.name_scope(self.norm_new_x.name):
|
| 452 |
+
self.norm_new_x.build([None, None, self.config.hidden_size])
|
| 453 |
+
if getattr(self, "mlp_channels", None) is not None:
|
| 454 |
+
with tf.name_scope(self.mlp_channels.name):
|
| 455 |
+
self.mlp_channels.build(None)
|
| 456 |
+
|
| 457 |
+
|
| 458 |
+
# Adapted from transformers.models.vit.modeling_tf_vit.TFViTPatchEmbeddings with ViT->GroupViT
|
| 459 |
+
class TFGroupViTPatchEmbeddings(keras.layers.Layer):
|
| 460 |
+
"""
|
| 461 |
+
This class turns `pixel_values` of shape `(batch_size, num_channels, height, width)` into the initial
|
| 462 |
+
`hidden_states` (patch embeddings) of shape `(batch_size, seq_length, hidden_size)` to be consumed by a
|
| 463 |
+
Transformer.
|
| 464 |
+
"""
|
| 465 |
+
|
| 466 |
+
def __init__(self, config: GroupViTConfig, **kwargs):
|
| 467 |
+
super().__init__(**kwargs)
|
| 468 |
+
image_size, patch_size = config.image_size, config.patch_size
|
| 469 |
+
num_channels = config.num_channels
|
| 470 |
+
# hidden_size is a member as it will be required in the call method
|
| 471 |
+
self.hidden_size = config.hidden_size
|
| 472 |
+
|
| 473 |
+
image_size = image_size if isinstance(image_size, collections.abc.Iterable) else (image_size, image_size)
|
| 474 |
+
patch_size = patch_size if isinstance(patch_size, collections.abc.Iterable) else (patch_size, patch_size)
|
| 475 |
+
num_patches = (image_size[1] // patch_size[1]) * (image_size[0] // patch_size[0])
|
| 476 |
+
self.image_size = image_size
|
| 477 |
+
self.patch_size = patch_size
|
| 478 |
+
self.num_patches = num_patches
|
| 479 |
+
self.num_channels = num_channels
|
| 480 |
+
self.config = config
|
| 481 |
+
|
| 482 |
+
self.projection = keras.layers.Conv2D(
|
| 483 |
+
filters=self.hidden_size,
|
| 484 |
+
kernel_size=patch_size,
|
| 485 |
+
strides=patch_size,
|
| 486 |
+
padding="valid",
|
| 487 |
+
data_format="channels_last",
|
| 488 |
+
use_bias=True,
|
| 489 |
+
kernel_initializer=get_initializer(self.config.initializer_range),
|
| 490 |
+
bias_initializer="zeros",
|
| 491 |
+
name="projection",
|
| 492 |
+
)
|
| 493 |
+
|
| 494 |
+
def call(
|
| 495 |
+
self, pixel_values: tf.Tensor, interpolate_pos_encoding: bool = False, training: bool = False
|
| 496 |
+
) -> tf.Tensor:
|
| 497 |
+
batch_size, num_channels, height, width = shape_list(pixel_values)
|
| 498 |
+
if tf.executing_eagerly() and num_channels != self.num_channels:
|
| 499 |
+
raise ValueError(
|
| 500 |
+
"Make sure that the channel dimension of the pixel values match with the one set in the configuration."
|
| 501 |
+
)
|
| 502 |
+
if (
|
| 503 |
+
not interpolate_pos_encoding
|
| 504 |
+
and tf.executing_eagerly()
|
| 505 |
+
and (height != self.image_size[0] or width != self.image_size[1])
|
| 506 |
+
):
|
| 507 |
+
raise ValueError(
|
| 508 |
+
f"Input image size ({height}*{width}) doesn't match model ({self.image_size[0]}*{self.image_size[1]})."
|
| 509 |
+
)
|
| 510 |
+
|
| 511 |
+
# When running on CPU, `keras.layers.Conv2D` doesn't support `NCHW` format.
|
| 512 |
+
# So change the input format from `NCHW` to `NHWC`.
|
| 513 |
+
# shape = (batch_size, in_height, in_width, in_channels=num_channels)
|
| 514 |
+
pixel_values = tf.transpose(pixel_values, perm=(0, 2, 3, 1))
|
| 515 |
+
|
| 516 |
+
projection = self.projection(pixel_values)
|
| 517 |
+
|
| 518 |
+
# Change the 2D spatial dimensions to a single temporal dimension.
|
| 519 |
+
# shape = (batch_size, num_patches, out_channels=embed_dim)
|
| 520 |
+
num_patches = (width // self.patch_size[1]) * (height // self.patch_size[0])
|
| 521 |
+
# In the TFGroupViTVisionEmbeddings the embeddings from this layer will be layer normalized
|
| 522 |
+
# LayerNormalization layer needs to have static last dimension (otherwise the test_keras_save_load fails with symbolic tensors)
|
| 523 |
+
# This is why we have used the hidden_size in the reshape method
|
| 524 |
+
embeddings = tf.reshape(tensor=projection, shape=(batch_size, num_patches, self.hidden_size))
|
| 525 |
+
|
| 526 |
+
return embeddings
|
| 527 |
+
|
| 528 |
+
def build(self, input_shape=None):
|
| 529 |
+
if self.built:
|
| 530 |
+
return
|
| 531 |
+
self.built = True
|
| 532 |
+
if getattr(self, "projection", None) is not None:
|
| 533 |
+
with tf.name_scope(self.projection.name):
|
| 534 |
+
self.projection.build([None, None, None, self.num_channels])
|
| 535 |
+
|
| 536 |
+
|
| 537 |
+
# Adapted from transformers.vit.modeling_tf_vit.TFViTEmbeddings
|
| 538 |
+
class TFGroupViTVisionEmbeddings(keras.layers.Layer):
|
| 539 |
+
"""
|
| 540 |
+
Construct the position and patch embeddings.
|
| 541 |
+
|
| 542 |
+
"""
|
| 543 |
+
|
| 544 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs):
|
| 545 |
+
super().__init__(**kwargs)
|
| 546 |
+
|
| 547 |
+
self.patch_embeddings = TFGroupViTPatchEmbeddings(config, name="patch_embeddings")
|
| 548 |
+
self.dropout = keras.layers.Dropout(rate=config.dropout, name="dropout")
|
| 549 |
+
self.layernorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layernorm")
|
| 550 |
+
self.config = config
|
| 551 |
+
|
| 552 |
+
def build(self, input_shape=None):
|
| 553 |
+
num_patches = self.patch_embeddings.num_patches
|
| 554 |
+
self.position_embeddings = self.add_weight(
|
| 555 |
+
shape=(1, num_patches, self.config.hidden_size),
|
| 556 |
+
initializer="zeros",
|
| 557 |
+
trainable=True,
|
| 558 |
+
name="position_embeddings",
|
| 559 |
+
)
|
| 560 |
+
|
| 561 |
+
if self.built:
|
| 562 |
+
return
|
| 563 |
+
self.built = True
|
| 564 |
+
if getattr(self, "patch_embeddings", None) is not None:
|
| 565 |
+
with tf.name_scope(self.patch_embeddings.name):
|
| 566 |
+
self.patch_embeddings.build(None)
|
| 567 |
+
if getattr(self, "dropout", None) is not None:
|
| 568 |
+
with tf.name_scope(self.dropout.name):
|
| 569 |
+
self.dropout.build(None)
|
| 570 |
+
if getattr(self, "layernorm", None) is not None:
|
| 571 |
+
with tf.name_scope(self.layernorm.name):
|
| 572 |
+
self.layernorm.build([None, None, self.config.hidden_size])
|
| 573 |
+
|
| 574 |
+
def interpolate_pos_encoding(self, embeddings, height, width) -> tf.Tensor:
|
| 575 |
+
"""
|
| 576 |
+
This method allows to interpolate the pre-trained position encodings, to be able to use the model on higher
|
| 577 |
+
resolution images.
|
| 578 |
+
|
| 579 |
+
Source:
|
| 580 |
+
https://github.com/facebookresearch/dino/blob/de9ee3df6cf39fac952ab558447af1fa1365362a/vision_transformer.py#L174
|
| 581 |
+
"""
|
| 582 |
+
|
| 583 |
+
batch_size, num_patches, dim = shape_list(embeddings)
|
| 584 |
+
num_positions = shape_list(self.position_embeddings)[1]
|
| 585 |
+
|
| 586 |
+
if num_patches == num_positions and height == width:
|
| 587 |
+
return self.position_embeddings
|
| 588 |
+
patch_pos_embed = self.position_embeddings
|
| 589 |
+
h0 = height // self.config.patch_size
|
| 590 |
+
w0 = width // self.config.patch_size
|
| 591 |
+
patch_pos_embed = tf.image.resize(
|
| 592 |
+
images=tf.reshape(
|
| 593 |
+
patch_pos_embed, shape=(1, int(math.sqrt(num_positions)), int(math.sqrt(num_positions)), dim)
|
| 594 |
+
),
|
| 595 |
+
size=(h0, w0),
|
| 596 |
+
method="bicubic",
|
| 597 |
+
)
|
| 598 |
+
patch_pos_embed = tf.reshape(tensor=patch_pos_embed, shape=(1, -1, dim))
|
| 599 |
+
return patch_pos_embed
|
| 600 |
+
|
| 601 |
+
def call(
|
| 602 |
+
self, pixel_values: tf.Tensor, interpolate_pos_encoding: bool = False, training: bool = False
|
| 603 |
+
) -> tf.Tensor:
|
| 604 |
+
_, _, height, width = shape_list(pixel_values)
|
| 605 |
+
embeddings = self.patch_embeddings(pixel_values, interpolate_pos_encoding=interpolate_pos_encoding)
|
| 606 |
+
embeddings = self.layernorm(embeddings)
|
| 607 |
+
|
| 608 |
+
# add positional encoding to each token
|
| 609 |
+
if interpolate_pos_encoding:
|
| 610 |
+
embeddings = embeddings + self.interpolate_pos_encoding(embeddings, height, width)
|
| 611 |
+
else:
|
| 612 |
+
embeddings = embeddings + self.position_embeddings
|
| 613 |
+
|
| 614 |
+
embeddings = self.dropout(embeddings)
|
| 615 |
+
|
| 616 |
+
return embeddings
|
| 617 |
+
|
| 618 |
+
|
| 619 |
+
# Copied from transformers.models.clip.modeling_tf_clip.TFCLIPTextEmbeddings with CLIP->GroupViT
|
| 620 |
+
class TFGroupViTTextEmbeddings(keras.layers.Layer):
|
| 621 |
+
def __init__(self, config: GroupViTTextConfig, **kwargs):
|
| 622 |
+
super().__init__(**kwargs)
|
| 623 |
+
|
| 624 |
+
self.embed_dim = config.hidden_size
|
| 625 |
+
|
| 626 |
+
self.config = config
|
| 627 |
+
|
| 628 |
+
def build(self, input_shape: tf.TensorShape = None):
|
| 629 |
+
with tf.name_scope("token_embedding"):
|
| 630 |
+
self.weight = self.add_weight(
|
| 631 |
+
shape=(self.config.vocab_size, self.embed_dim),
|
| 632 |
+
initializer=get_initializer(self.config.initializer_factor * self.config.initializer_range),
|
| 633 |
+
trainable=True,
|
| 634 |
+
name="weight",
|
| 635 |
+
)
|
| 636 |
+
|
| 637 |
+
with tf.name_scope("position_embedding"):
|
| 638 |
+
self.position_embedding = self.add_weight(
|
| 639 |
+
shape=(self.config.max_position_embeddings, self.embed_dim),
|
| 640 |
+
initializer=get_initializer(self.config.initializer_factor * self.config.initializer_range),
|
| 641 |
+
trainable=True,
|
| 642 |
+
name="embeddings",
|
| 643 |
+
)
|
| 644 |
+
|
| 645 |
+
super().build(input_shape)
|
| 646 |
+
|
| 647 |
+
def call(
|
| 648 |
+
self,
|
| 649 |
+
input_ids: tf.Tensor | None = None,
|
| 650 |
+
position_ids: tf.Tensor | None = None,
|
| 651 |
+
inputs_embeds: tf.Tensor | None = None,
|
| 652 |
+
) -> tf.Tensor:
|
| 653 |
+
"""
|
| 654 |
+
Applies embedding based on inputs tensor.
|
| 655 |
+
|
| 656 |
+
Returns:
|
| 657 |
+
final_embeddings (`tf.Tensor`): output embedding tensor.
|
| 658 |
+
"""
|
| 659 |
+
if input_ids is None and inputs_embeds is None:
|
| 660 |
+
raise ValueError("You have to specify either input_ids or inputs_embeds")
|
| 661 |
+
|
| 662 |
+
if inputs_embeds is None:
|
| 663 |
+
check_embeddings_within_bounds(input_ids, self.config.vocab_size)
|
| 664 |
+
inputs_embeds = tf.gather(params=self.weight, indices=input_ids)
|
| 665 |
+
|
| 666 |
+
input_shape = shape_list(inputs_embeds)[:-1]
|
| 667 |
+
|
| 668 |
+
if position_ids is None:
|
| 669 |
+
position_ids = tf.expand_dims(tf.range(start=0, limit=input_shape[-1]), axis=0)
|
| 670 |
+
|
| 671 |
+
position_embeds = tf.gather(params=self.position_embedding, indices=position_ids)
|
| 672 |
+
position_embeds = tf.tile(input=position_embeds, multiples=(input_shape[0], 1, 1))
|
| 673 |
+
final_embeddings = inputs_embeds + position_embeds
|
| 674 |
+
|
| 675 |
+
return final_embeddings
|
| 676 |
+
|
| 677 |
+
|
| 678 |
+
class TFGroupViTStage(keras.layers.Layer):
|
| 679 |
+
"""This corresponds to the `GroupingLayer` class in the GroupViT implementation."""
|
| 680 |
+
|
| 681 |
+
def __init__(
|
| 682 |
+
self,
|
| 683 |
+
config: GroupViTVisionConfig,
|
| 684 |
+
depth: int,
|
| 685 |
+
num_prev_group_token: int,
|
| 686 |
+
num_group_token: int,
|
| 687 |
+
num_output_group: int,
|
| 688 |
+
**kwargs,
|
| 689 |
+
):
|
| 690 |
+
super().__init__(**kwargs)
|
| 691 |
+
self.config = config
|
| 692 |
+
self.depth = depth
|
| 693 |
+
self.num_group_token = num_group_token
|
| 694 |
+
self.layers = [TFGroupViTEncoderLayer(config, name=f"layers_._{i}") for i in range(depth)]
|
| 695 |
+
|
| 696 |
+
if num_group_token > 0:
|
| 697 |
+
self.downsample = TFGroupViTTokenAssign(
|
| 698 |
+
config=config,
|
| 699 |
+
num_group_token=num_group_token,
|
| 700 |
+
num_output_group=num_output_group,
|
| 701 |
+
name="downsample",
|
| 702 |
+
)
|
| 703 |
+
else:
|
| 704 |
+
self.downsample = None
|
| 705 |
+
|
| 706 |
+
if num_prev_group_token > 0 and num_group_token > 0:
|
| 707 |
+
self.group_projector = [
|
| 708 |
+
keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="group_projector.0"),
|
| 709 |
+
TFGroupViTMixerMLP(
|
| 710 |
+
config, num_prev_group_token, config.hidden_size // 2, num_group_token, name="group_projector.1"
|
| 711 |
+
),
|
| 712 |
+
]
|
| 713 |
+
else:
|
| 714 |
+
self.group_projector = None
|
| 715 |
+
|
| 716 |
+
def build(self, input_shape=None):
|
| 717 |
+
if self.num_group_token > 0:
|
| 718 |
+
self.group_token = self.add_weight(
|
| 719 |
+
shape=(1, self.num_group_token, self.config.hidden_size),
|
| 720 |
+
initializer="zeros",
|
| 721 |
+
trainable=True,
|
| 722 |
+
name="group_token",
|
| 723 |
+
)
|
| 724 |
+
else:
|
| 725 |
+
self.group_token = None
|
| 726 |
+
|
| 727 |
+
if self.built:
|
| 728 |
+
return
|
| 729 |
+
self.built = True
|
| 730 |
+
if getattr(self, "downsample", None) is not None:
|
| 731 |
+
with tf.name_scope(self.downsample.name):
|
| 732 |
+
self.downsample.build(None)
|
| 733 |
+
if getattr(self, "layers", None) is not None:
|
| 734 |
+
for layer in self.layers:
|
| 735 |
+
with tf.name_scope(layer.name):
|
| 736 |
+
layer.build(None)
|
| 737 |
+
if getattr(self, "group_projector", None) is not None:
|
| 738 |
+
with tf.name_scope(self.group_projector[0].name):
|
| 739 |
+
self.group_projector[0].build([None, None, self.config.hidden_size])
|
| 740 |
+
with tf.name_scope(self.group_projector[1].name):
|
| 741 |
+
self.group_projector[1].build(None)
|
| 742 |
+
|
| 743 |
+
@property
|
| 744 |
+
def with_group_token(self):
|
| 745 |
+
return self.group_token is not None
|
| 746 |
+
|
| 747 |
+
def split_x(self, x: tf.Tensor) -> tf.Tensor:
|
| 748 |
+
if self.with_group_token:
|
| 749 |
+
return x[:, : -self.num_group_token], x[:, -self.num_group_token :]
|
| 750 |
+
else:
|
| 751 |
+
return x, None
|
| 752 |
+
|
| 753 |
+
def concat_x(self, x: tf.Tensor, group_token: tf.Tensor | None = None) -> tf.Tensor:
|
| 754 |
+
if group_token is None:
|
| 755 |
+
return x
|
| 756 |
+
return tf.concat([x, group_token], axis=1)
|
| 757 |
+
|
| 758 |
+
def call(
|
| 759 |
+
self,
|
| 760 |
+
hidden_states: tf.Tensor,
|
| 761 |
+
prev_group_token: tf.Tensor | None = None,
|
| 762 |
+
output_attentions: bool = False,
|
| 763 |
+
training: bool = False,
|
| 764 |
+
) -> tuple[tf.Tensor]:
|
| 765 |
+
"""
|
| 766 |
+
Args:
|
| 767 |
+
hidden_states (`tf.Tensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
| 768 |
+
attention_mask (`tf.Tensor`): attention mask of size
|
| 769 |
+
`(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
|
| 770 |
+
`(config.encoder_attention_heads,)`.
|
| 771 |
+
output_attentions (`bool`, *optional*):
|
| 772 |
+
Whether or not to return the grouping tensors of Grouping block.
|
| 773 |
+
"""
|
| 774 |
+
if self.with_group_token:
|
| 775 |
+
group_token = tf.tile(self.group_token, multiples=(shape_list(hidden_states)[0], 1, 1))
|
| 776 |
+
if self.group_projector is not None:
|
| 777 |
+
for layer in self.group_projector:
|
| 778 |
+
prev_group_token = layer(prev_group_token)
|
| 779 |
+
group_token = group_token + prev_group_token
|
| 780 |
+
else:
|
| 781 |
+
group_token = None
|
| 782 |
+
|
| 783 |
+
x = hidden_states
|
| 784 |
+
|
| 785 |
+
cat_x = self.concat_x(x, group_token)
|
| 786 |
+
for layer in self.layers:
|
| 787 |
+
layer_out = layer(
|
| 788 |
+
cat_x,
|
| 789 |
+
attention_mask=None,
|
| 790 |
+
causal_attention_mask=None,
|
| 791 |
+
output_attentions=None,
|
| 792 |
+
)
|
| 793 |
+
cat_x = layer_out[0]
|
| 794 |
+
|
| 795 |
+
x, group_token = self.split_x(cat_x)
|
| 796 |
+
|
| 797 |
+
attention = None
|
| 798 |
+
if self.downsample is not None:
|
| 799 |
+
x, attention = self.downsample(x, group_token)
|
| 800 |
+
|
| 801 |
+
outputs = (x, group_token)
|
| 802 |
+
if output_attentions:
|
| 803 |
+
outputs = outputs + (attention,)
|
| 804 |
+
|
| 805 |
+
return outputs
|
| 806 |
+
|
| 807 |
+
|
| 808 |
+
class TFGroupViTMLP(keras.layers.Layer):
|
| 809 |
+
def __init__(
|
| 810 |
+
self,
|
| 811 |
+
config: GroupViTVisionConfig,
|
| 812 |
+
hidden_size: int | None = None,
|
| 813 |
+
intermediate_size: int | None = None,
|
| 814 |
+
output_size: int | None = None,
|
| 815 |
+
**kwargs,
|
| 816 |
+
):
|
| 817 |
+
super().__init__(**kwargs)
|
| 818 |
+
self.config = config
|
| 819 |
+
self.activation_fn = get_tf_activation(config.hidden_act)
|
| 820 |
+
hidden_size = hidden_size if hidden_size is not None else config.hidden_size
|
| 821 |
+
intermediate_size = intermediate_size if intermediate_size is not None else config.intermediate_size
|
| 822 |
+
output_size = output_size if output_size is not None else hidden_size
|
| 823 |
+
self.fc1 = keras.layers.Dense(intermediate_size, name="fc1")
|
| 824 |
+
self.fc2 = keras.layers.Dense(output_size, name="fc2")
|
| 825 |
+
self.intermediate_size = intermediate_size
|
| 826 |
+
self.hidden_size = hidden_size
|
| 827 |
+
|
| 828 |
+
def call(self, hidden_states: tf.Tensor, training: bool = False) -> tf.Tensor:
|
| 829 |
+
hidden_states = self.fc1(hidden_states)
|
| 830 |
+
hidden_states = self.activation_fn(hidden_states)
|
| 831 |
+
hidden_states = self.fc2(hidden_states)
|
| 832 |
+
return hidden_states
|
| 833 |
+
|
| 834 |
+
def build(self, input_shape=None):
|
| 835 |
+
if self.built:
|
| 836 |
+
return
|
| 837 |
+
self.built = True
|
| 838 |
+
if getattr(self, "fc1", None) is not None:
|
| 839 |
+
with tf.name_scope(self.fc1.name):
|
| 840 |
+
self.fc1.build([None, None, self.hidden_size])
|
| 841 |
+
if getattr(self, "fc2", None) is not None:
|
| 842 |
+
with tf.name_scope(self.fc2.name):
|
| 843 |
+
self.fc2.build([None, None, self.intermediate_size])
|
| 844 |
+
|
| 845 |
+
|
| 846 |
+
class TFGroupViTMixerMLP(TFGroupViTMLP):
|
| 847 |
+
def call(self, x, training: bool = False):
|
| 848 |
+
x = super().call(hidden_states=tf.transpose(x, perm=(0, 2, 1)))
|
| 849 |
+
return tf.transpose(x, perm=(0, 2, 1))
|
| 850 |
+
|
| 851 |
+
|
| 852 |
+
# Adapted from transformers.models.clip.modeling_tf_clip.TFCLIPAttention
|
| 853 |
+
class TFGroupViTAttention(keras.layers.Layer):
|
| 854 |
+
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
| 855 |
+
|
| 856 |
+
def __init__(self, config: GroupViTConfig, **kwargs):
|
| 857 |
+
super().__init__(**kwargs)
|
| 858 |
+
|
| 859 |
+
self.embed_dim = config.hidden_size
|
| 860 |
+
self.num_attention_heads = config.num_attention_heads
|
| 861 |
+
self.attention_head_size = self.embed_dim // self.num_attention_heads
|
| 862 |
+
if self.attention_head_size * self.num_attention_heads != self.embed_dim:
|
| 863 |
+
raise ValueError(
|
| 864 |
+
f"embed_dim must be divisible by num_heads (got `embed_dim`: {self.embed_dim} and `num_heads`:"
|
| 865 |
+
f" {self.num_attention_heads})."
|
| 866 |
+
)
|
| 867 |
+
|
| 868 |
+
factor = config.initializer_factor
|
| 869 |
+
in_proj_std = (self.embed_dim**-0.5) * ((2 * config.num_hidden_layers) ** -0.5) * factor
|
| 870 |
+
out_proj_std = (self.embed_dim**-0.5) * factor
|
| 871 |
+
|
| 872 |
+
self.sqrt_att_head_size = math.sqrt(self.attention_head_size)
|
| 873 |
+
|
| 874 |
+
self.q_proj = keras.layers.Dense(
|
| 875 |
+
units=self.embed_dim, kernel_initializer=get_initializer(in_proj_std), name="q_proj"
|
| 876 |
+
)
|
| 877 |
+
self.k_proj = keras.layers.Dense(
|
| 878 |
+
units=self.embed_dim, kernel_initializer=get_initializer(in_proj_std), name="k_proj"
|
| 879 |
+
)
|
| 880 |
+
self.v_proj = keras.layers.Dense(
|
| 881 |
+
units=self.embed_dim, kernel_initializer=get_initializer(in_proj_std), name="v_proj"
|
| 882 |
+
)
|
| 883 |
+
|
| 884 |
+
self.dropout = keras.layers.Dropout(rate=config.attention_dropout)
|
| 885 |
+
|
| 886 |
+
self.out_proj = keras.layers.Dense(
|
| 887 |
+
units=self.embed_dim, kernel_initializer=get_initializer(out_proj_std), name="out_proj"
|
| 888 |
+
)
|
| 889 |
+
|
| 890 |
+
# Copied from transformers.models.bert.modeling_tf_bert.TFBertSelfAttention.transpose_for_scores
|
| 891 |
+
def transpose_for_scores(self, tensor: tf.Tensor, batch_size: int) -> tf.Tensor:
|
| 892 |
+
# Reshape from [batch_size, seq_length, all_head_size] to [batch_size, seq_length, num_attention_heads, attention_head_size]
|
| 893 |
+
tensor = tf.reshape(tensor=tensor, shape=(batch_size, -1, self.num_attention_heads, self.attention_head_size))
|
| 894 |
+
|
| 895 |
+
# Transpose the tensor from [batch_size, seq_length, num_attention_heads, attention_head_size] to [batch_size, num_attention_heads, seq_length, attention_head_size]
|
| 896 |
+
return tf.transpose(tensor, perm=[0, 2, 1, 3])
|
| 897 |
+
|
| 898 |
+
def call(
|
| 899 |
+
self,
|
| 900 |
+
hidden_states: tf.Tensor,
|
| 901 |
+
attention_mask: tf.Tensor | None = None,
|
| 902 |
+
causal_attention_mask: tf.Tensor | None = None,
|
| 903 |
+
output_attentions: bool | None = None,
|
| 904 |
+
encoder_hidden_states: tf.Tensor | None = None,
|
| 905 |
+
training: bool = False,
|
| 906 |
+
) -> tuple[tf.Tensor]:
|
| 907 |
+
"""Input shape: Batch x Time x Channel"""
|
| 908 |
+
|
| 909 |
+
batch_size = shape_list(hidden_states)[0]
|
| 910 |
+
is_cross_attention = encoder_hidden_states is not None
|
| 911 |
+
|
| 912 |
+
mixed_query_layer = self.q_proj(inputs=hidden_states)
|
| 913 |
+
if is_cross_attention:
|
| 914 |
+
mixed_key_layer = self.k_proj(inputs=encoder_hidden_states)
|
| 915 |
+
mixed_value_layer = self.v_proj(inputs=encoder_hidden_states)
|
| 916 |
+
else:
|
| 917 |
+
mixed_key_layer = self.k_proj(inputs=hidden_states)
|
| 918 |
+
mixed_value_layer = self.v_proj(inputs=hidden_states)
|
| 919 |
+
|
| 920 |
+
query_layer = self.transpose_for_scores(mixed_query_layer, batch_size)
|
| 921 |
+
key_layer = self.transpose_for_scores(mixed_key_layer, batch_size)
|
| 922 |
+
value_layer = self.transpose_for_scores(mixed_value_layer, batch_size)
|
| 923 |
+
|
| 924 |
+
# Take the dot product between "query" and "key" to get the raw attention scores.
|
| 925 |
+
# (batch size, num_heads, seq_len_q, seq_len_k)
|
| 926 |
+
attention_scores = tf.matmul(query_layer, key_layer, transpose_b=True)
|
| 927 |
+
dk = tf.cast(self.sqrt_att_head_size, dtype=attention_scores.dtype)
|
| 928 |
+
attention_scores = tf.divide(attention_scores, dk)
|
| 929 |
+
|
| 930 |
+
# apply the causal_attention_mask first
|
| 931 |
+
if causal_attention_mask is not None:
|
| 932 |
+
# Apply the causal attention mask (precomputed for all layers in TFCLIPModel call() function)
|
| 933 |
+
attention_scores = tf.add(attention_scores, causal_attention_mask)
|
| 934 |
+
|
| 935 |
+
if attention_mask is not None:
|
| 936 |
+
# Apply the attention mask (precomputed for all layers in TFCLIPModel call() function)
|
| 937 |
+
attention_scores = tf.add(attention_scores, attention_mask)
|
| 938 |
+
|
| 939 |
+
# Normalize the attention scores to probabilities.
|
| 940 |
+
_attention_probs = stable_softmax(logits=attention_scores, axis=-1)
|
| 941 |
+
|
| 942 |
+
# This is actually dropping out entire tokens to attend to, which might
|
| 943 |
+
# seem a bit unusual, but is taken from the original Transformer paper.
|
| 944 |
+
attention_probs = self.dropout(inputs=_attention_probs)
|
| 945 |
+
|
| 946 |
+
attention_output = tf.matmul(attention_probs, value_layer)
|
| 947 |
+
attention_output = tf.transpose(attention_output, perm=[0, 2, 1, 3])
|
| 948 |
+
|
| 949 |
+
# (batch_size, seq_len_q, embed_dim)
|
| 950 |
+
attention_output = tf.reshape(tensor=attention_output, shape=(batch_size, -1, self.embed_dim))
|
| 951 |
+
|
| 952 |
+
attention_output = self.out_proj(attention_output)
|
| 953 |
+
# In TFBert, attention weights are returned after dropout.
|
| 954 |
+
# However, in CLIP, they are returned before dropout.
|
| 955 |
+
outputs = (attention_output, _attention_probs) if output_attentions else (attention_output,)
|
| 956 |
+
|
| 957 |
+
return outputs
|
| 958 |
+
|
| 959 |
+
def build(self, input_shape=None):
|
| 960 |
+
if self.built:
|
| 961 |
+
return
|
| 962 |
+
self.built = True
|
| 963 |
+
if getattr(self, "q_proj", None) is not None:
|
| 964 |
+
with tf.name_scope(self.q_proj.name):
|
| 965 |
+
self.q_proj.build([None, None, self.embed_dim])
|
| 966 |
+
if getattr(self, "k_proj", None) is not None:
|
| 967 |
+
with tf.name_scope(self.k_proj.name):
|
| 968 |
+
self.k_proj.build([None, None, self.embed_dim])
|
| 969 |
+
if getattr(self, "v_proj", None) is not None:
|
| 970 |
+
with tf.name_scope(self.v_proj.name):
|
| 971 |
+
self.v_proj.build([None, None, self.embed_dim])
|
| 972 |
+
if getattr(self, "out_proj", None) is not None:
|
| 973 |
+
with tf.name_scope(self.out_proj.name):
|
| 974 |
+
self.out_proj.build([None, None, self.embed_dim])
|
| 975 |
+
|
| 976 |
+
|
| 977 |
+
# Copied from transformers.models.clip.modeling_tf_clip.TFCLIPEncoderLayer with CLIP->GroupViT
|
| 978 |
+
class TFGroupViTEncoderLayer(keras.layers.Layer):
|
| 979 |
+
def __init__(self, config: GroupViTConfig, **kwargs):
|
| 980 |
+
super().__init__(**kwargs)
|
| 981 |
+
|
| 982 |
+
self.embed_dim = config.hidden_size
|
| 983 |
+
self.self_attn = TFGroupViTAttention(config, name="self_attn")
|
| 984 |
+
self.layer_norm1 = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm1")
|
| 985 |
+
self.mlp = TFGroupViTMLP(config, name="mlp")
|
| 986 |
+
self.layer_norm2 = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm2")
|
| 987 |
+
|
| 988 |
+
def call(
|
| 989 |
+
self,
|
| 990 |
+
hidden_states: tf.Tensor,
|
| 991 |
+
attention_mask: tf.Tensor,
|
| 992 |
+
causal_attention_mask: tf.Tensor,
|
| 993 |
+
output_attentions: bool,
|
| 994 |
+
training: bool = False,
|
| 995 |
+
) -> tuple[tf.Tensor]:
|
| 996 |
+
"""
|
| 997 |
+
Args:
|
| 998 |
+
hidden_states (`tf.Tensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
| 999 |
+
attention_mask (`tf.Tensor`): attention mask of size
|
| 1000 |
+
`(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
|
| 1001 |
+
causal_attention_mask (`tf.Tensor`): causal attention mask of size
|
| 1002 |
+
`(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
|
| 1003 |
+
output_attentions (`bool`):
|
| 1004 |
+
Whether or not to return the attentions tensors of all attention layers. See `outputs` under returned
|
| 1005 |
+
tensors for more detail.
|
| 1006 |
+
"""
|
| 1007 |
+
residual = hidden_states
|
| 1008 |
+
|
| 1009 |
+
hidden_states = self.layer_norm1(inputs=hidden_states)
|
| 1010 |
+
attention_outputs = self.self_attn(
|
| 1011 |
+
hidden_states=hidden_states,
|
| 1012 |
+
attention_mask=attention_mask,
|
| 1013 |
+
causal_attention_mask=causal_attention_mask,
|
| 1014 |
+
output_attentions=output_attentions,
|
| 1015 |
+
training=training,
|
| 1016 |
+
)
|
| 1017 |
+
hidden_states = attention_outputs[0]
|
| 1018 |
+
hidden_states = residual + hidden_states
|
| 1019 |
+
|
| 1020 |
+
residual = hidden_states
|
| 1021 |
+
hidden_states = self.layer_norm2(inputs=hidden_states)
|
| 1022 |
+
hidden_states = self.mlp(hidden_states=hidden_states)
|
| 1023 |
+
hidden_states = residual + hidden_states
|
| 1024 |
+
|
| 1025 |
+
outputs = (hidden_states,) + attention_outputs[1:] # add attentions if we output them
|
| 1026 |
+
|
| 1027 |
+
return outputs
|
| 1028 |
+
|
| 1029 |
+
def build(self, input_shape=None):
|
| 1030 |
+
if self.built:
|
| 1031 |
+
return
|
| 1032 |
+
self.built = True
|
| 1033 |
+
if getattr(self, "self_attn", None) is not None:
|
| 1034 |
+
with tf.name_scope(self.self_attn.name):
|
| 1035 |
+
self.self_attn.build(None)
|
| 1036 |
+
if getattr(self, "layer_norm1", None) is not None:
|
| 1037 |
+
with tf.name_scope(self.layer_norm1.name):
|
| 1038 |
+
self.layer_norm1.build([None, None, self.embed_dim])
|
| 1039 |
+
if getattr(self, "mlp", None) is not None:
|
| 1040 |
+
with tf.name_scope(self.mlp.name):
|
| 1041 |
+
self.mlp.build(None)
|
| 1042 |
+
if getattr(self, "layer_norm2", None) is not None:
|
| 1043 |
+
with tf.name_scope(self.layer_norm2.name):
|
| 1044 |
+
self.layer_norm2.build([None, None, self.embed_dim])
|
| 1045 |
+
|
| 1046 |
+
|
| 1047 |
+
# Adapted from transformers.models.clip.modeling_tf_clip.TFGroupViTTextEncoder
|
| 1048 |
+
class TFGroupViTTextEncoder(keras.layers.Layer):
|
| 1049 |
+
def __init__(self, config: GroupViTTextConfig, **kwargs):
|
| 1050 |
+
super().__init__(**kwargs)
|
| 1051 |
+
|
| 1052 |
+
self.layers = [TFGroupViTEncoderLayer(config, name=f"layers_._{i}") for i in range(config.num_hidden_layers)]
|
| 1053 |
+
|
| 1054 |
+
def call(
|
| 1055 |
+
self,
|
| 1056 |
+
hidden_states,
|
| 1057 |
+
attention_mask: tf.Tensor,
|
| 1058 |
+
causal_attention_mask: tf.Tensor,
|
| 1059 |
+
output_attentions: bool,
|
| 1060 |
+
output_hidden_states: bool,
|
| 1061 |
+
return_dict: bool,
|
| 1062 |
+
training: bool = False,
|
| 1063 |
+
) -> tuple | TFBaseModelOutput:
|
| 1064 |
+
encoder_states = () if output_hidden_states else None
|
| 1065 |
+
all_attentions = () if output_attentions else None
|
| 1066 |
+
|
| 1067 |
+
for idx, encoder_layer in enumerate(self.layers):
|
| 1068 |
+
if output_hidden_states:
|
| 1069 |
+
encoder_states = encoder_states + (hidden_states,)
|
| 1070 |
+
|
| 1071 |
+
layer_outputs = encoder_layer(
|
| 1072 |
+
hidden_states,
|
| 1073 |
+
attention_mask,
|
| 1074 |
+
causal_attention_mask,
|
| 1075 |
+
output_attentions=output_attentions,
|
| 1076 |
+
)
|
| 1077 |
+
hidden_states = layer_outputs[0]
|
| 1078 |
+
|
| 1079 |
+
if output_attentions:
|
| 1080 |
+
all_attentions = all_attentions + (layer_outputs[1],)
|
| 1081 |
+
|
| 1082 |
+
if output_hidden_states:
|
| 1083 |
+
encoder_states = encoder_states + (hidden_states,)
|
| 1084 |
+
|
| 1085 |
+
if not return_dict:
|
| 1086 |
+
return tuple(v for v in [hidden_states, encoder_states, all_attentions] if v is not None)
|
| 1087 |
+
return TFBaseModelOutput(
|
| 1088 |
+
last_hidden_state=hidden_states, hidden_states=encoder_states, attentions=all_attentions
|
| 1089 |
+
)
|
| 1090 |
+
|
| 1091 |
+
def build(self, input_shape=None):
|
| 1092 |
+
if self.built:
|
| 1093 |
+
return
|
| 1094 |
+
self.built = True
|
| 1095 |
+
if getattr(self, "layers", None) is not None:
|
| 1096 |
+
for layer in self.layers:
|
| 1097 |
+
with tf.name_scope(layer.name):
|
| 1098 |
+
layer.build(None)
|
| 1099 |
+
|
| 1100 |
+
|
| 1101 |
+
class TFGroupViTVisionEncoder(keras.layers.Layer):
|
| 1102 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs) -> None:
|
| 1103 |
+
super().__init__(**kwargs)
|
| 1104 |
+
|
| 1105 |
+
self.stages = [
|
| 1106 |
+
TFGroupViTStage(
|
| 1107 |
+
config=config,
|
| 1108 |
+
depth=config.depths[i],
|
| 1109 |
+
num_group_token=config.num_group_tokens[i],
|
| 1110 |
+
num_output_group=config.num_output_groups[i],
|
| 1111 |
+
num_prev_group_token=config.num_output_groups[i - 1] if i > 0 else 0,
|
| 1112 |
+
name=f"stages_._{i}",
|
| 1113 |
+
)
|
| 1114 |
+
for i in range(len(config.depths))
|
| 1115 |
+
]
|
| 1116 |
+
|
| 1117 |
+
def call(
|
| 1118 |
+
self,
|
| 1119 |
+
hidden_states: tf.Tensor,
|
| 1120 |
+
output_hidden_states: bool,
|
| 1121 |
+
output_attentions: bool,
|
| 1122 |
+
return_dict: bool,
|
| 1123 |
+
training: bool = False,
|
| 1124 |
+
) -> tuple | TFBaseModelOutput:
|
| 1125 |
+
all_hidden_states = () if output_hidden_states else None
|
| 1126 |
+
all_groupings = () if output_attentions else None
|
| 1127 |
+
|
| 1128 |
+
group_tokens = None
|
| 1129 |
+
|
| 1130 |
+
for stage in self.stages:
|
| 1131 |
+
if output_hidden_states:
|
| 1132 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1133 |
+
|
| 1134 |
+
layer_outputs = stage(hidden_states, group_tokens, output_attentions)
|
| 1135 |
+
|
| 1136 |
+
hidden_states = layer_outputs[0]
|
| 1137 |
+
group_tokens = layer_outputs[1]
|
| 1138 |
+
|
| 1139 |
+
if output_attentions and layer_outputs[2] is not None:
|
| 1140 |
+
all_groupings = all_groupings + (layer_outputs[2],)
|
| 1141 |
+
|
| 1142 |
+
if output_hidden_states:
|
| 1143 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1144 |
+
|
| 1145 |
+
if not return_dict:
|
| 1146 |
+
return tuple(v for v in [hidden_states, all_hidden_states, all_groupings] if v is not None)
|
| 1147 |
+
return TFBaseModelOutput(
|
| 1148 |
+
last_hidden_state=hidden_states, hidden_states=all_hidden_states, attentions=all_groupings
|
| 1149 |
+
)
|
| 1150 |
+
|
| 1151 |
+
def build(self, input_shape=None):
|
| 1152 |
+
if self.built:
|
| 1153 |
+
return
|
| 1154 |
+
self.built = True
|
| 1155 |
+
if getattr(self, "stages", None) is not None:
|
| 1156 |
+
for layer in self.stages:
|
| 1157 |
+
with tf.name_scope(layer.name):
|
| 1158 |
+
layer.build(None)
|
| 1159 |
+
|
| 1160 |
+
|
| 1161 |
+
# Copied from transformers.models.clip.modeling_tf_clip.TFCLIPTextTransformer with CLIPText->GroupViTText, CLIPEncoder->GroupViTTextEncoder
|
| 1162 |
+
class TFGroupViTTextTransformer(keras.layers.Layer):
|
| 1163 |
+
def __init__(self, config: GroupViTTextConfig, **kwargs):
|
| 1164 |
+
super().__init__(**kwargs)
|
| 1165 |
+
|
| 1166 |
+
self.embeddings = TFGroupViTTextEmbeddings(config, name="embeddings")
|
| 1167 |
+
self.encoder = TFGroupViTTextEncoder(config, name="encoder")
|
| 1168 |
+
self.final_layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="final_layer_norm")
|
| 1169 |
+
|
| 1170 |
+
# For `pooled_output` computation
|
| 1171 |
+
self.eos_token_id = config.eos_token_id
|
| 1172 |
+
self.embed_dim = config.hidden_size
|
| 1173 |
+
|
| 1174 |
+
def call(
|
| 1175 |
+
self,
|
| 1176 |
+
input_ids: TFModelInputType,
|
| 1177 |
+
attention_mask: tf.Tensor,
|
| 1178 |
+
position_ids: tf.Tensor,
|
| 1179 |
+
output_attentions: bool,
|
| 1180 |
+
output_hidden_states: bool,
|
| 1181 |
+
return_dict: bool,
|
| 1182 |
+
training: bool = False,
|
| 1183 |
+
) -> TFBaseModelOutputWithPooling | tuple[tf.Tensor]:
|
| 1184 |
+
input_shape = shape_list(input_ids)
|
| 1185 |
+
|
| 1186 |
+
embedding_output = self.embeddings(input_ids=input_ids, position_ids=position_ids)
|
| 1187 |
+
|
| 1188 |
+
batch_size, seq_length = input_shape
|
| 1189 |
+
# CLIP's text model uses causal mask, prepare it here.
|
| 1190 |
+
# https://github.com/openai/CLIP/blob/cfcffb90e69f37bf2ff1e988237a0fbe41f33c04/clip/model.py#L324
|
| 1191 |
+
causal_attention_mask = self._build_causal_attention_mask(batch_size, seq_length, dtype=embedding_output.dtype)
|
| 1192 |
+
|
| 1193 |
+
# check attention mask and invert
|
| 1194 |
+
# [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
|
| 1195 |
+
attention_mask = _expand_mask(attention_mask)
|
| 1196 |
+
|
| 1197 |
+
encoder_outputs = self.encoder(
|
| 1198 |
+
hidden_states=embedding_output,
|
| 1199 |
+
attention_mask=attention_mask,
|
| 1200 |
+
causal_attention_mask=causal_attention_mask,
|
| 1201 |
+
output_attentions=output_attentions,
|
| 1202 |
+
output_hidden_states=output_hidden_states,
|
| 1203 |
+
return_dict=return_dict,
|
| 1204 |
+
training=training,
|
| 1205 |
+
)
|
| 1206 |
+
|
| 1207 |
+
sequence_output = encoder_outputs[0]
|
| 1208 |
+
sequence_output = self.final_layer_norm(inputs=sequence_output)
|
| 1209 |
+
|
| 1210 |
+
if self.eos_token_id == 2:
|
| 1211 |
+
# The `eos_token_id` was incorrect before PR #24773: Let's keep what have been done here.
|
| 1212 |
+
# A CLIP model with such `eos_token_id` in the config can't work correctly with extra new tokens added
|
| 1213 |
+
# ------------------------------------------------------------
|
| 1214 |
+
# text_embeds.shape = [batch_size, n_ctx, transformer.width]
|
| 1215 |
+
# take features from the eot embedding (eot_token is the highest number in each sequence)
|
| 1216 |
+
pooled_output = tf.gather_nd(
|
| 1217 |
+
params=sequence_output,
|
| 1218 |
+
indices=tf.stack(
|
| 1219 |
+
values=(tf.range(input_shape[0], dtype=tf.int64), tf.math.argmax(input_ids, axis=-1)), axis=1
|
| 1220 |
+
),
|
| 1221 |
+
)
|
| 1222 |
+
else:
|
| 1223 |
+
# The config gets updated `eos_token_id` from PR #24773 (so the use of extra new tokens is possible)
|
| 1224 |
+
pooled_output = tf.gather_nd(
|
| 1225 |
+
params=sequence_output,
|
| 1226 |
+
indices=tf.stack(
|
| 1227 |
+
values=(
|
| 1228 |
+
tf.range(input_shape[0], dtype=tf.int64),
|
| 1229 |
+
tf.math.argmax(tf.cast(input_ids == self.eos_token_id, dtype=tf.int8), axis=-1),
|
| 1230 |
+
),
|
| 1231 |
+
axis=1,
|
| 1232 |
+
),
|
| 1233 |
+
)
|
| 1234 |
+
|
| 1235 |
+
if not return_dict:
|
| 1236 |
+
return (sequence_output, pooled_output) + encoder_outputs[1:]
|
| 1237 |
+
|
| 1238 |
+
return TFBaseModelOutputWithPooling(
|
| 1239 |
+
last_hidden_state=sequence_output,
|
| 1240 |
+
pooler_output=pooled_output,
|
| 1241 |
+
hidden_states=encoder_outputs.hidden_states,
|
| 1242 |
+
attentions=encoder_outputs.attentions,
|
| 1243 |
+
)
|
| 1244 |
+
|
| 1245 |
+
def _build_causal_attention_mask(self, batch_size, seq_length, dtype=tf.float32):
|
| 1246 |
+
# It is possible with an unspecified sequence length for seq_length to be
|
| 1247 |
+
# a runtime value, which is unsupported by tf.constant. Per the TensorFlow
|
| 1248 |
+
# docs, tf.fill can handle runtime dynamic shapes:
|
| 1249 |
+
# https://www.tensorflow.org/api_docs/python/tf/fill
|
| 1250 |
+
diag = tf.cast(tf.fill((seq_length,), 0.0), dtype)
|
| 1251 |
+
|
| 1252 |
+
# set an additive 2D attention mask with all places being masked
|
| 1253 |
+
to_mask = tf.cast(tf.fill((seq_length, seq_length), -10000.0), dtype)
|
| 1254 |
+
|
| 1255 |
+
# set diagonal & lower triangular parts to 0 (i.e. the places not to be masked)
|
| 1256 |
+
# TIP: think the 2D matrix as the space of (query_seq, key_seq)
|
| 1257 |
+
to_mask = tf.linalg.band_part(to_mask, 0, -1)
|
| 1258 |
+
# to_mask = tf.linalg.band_part(to_mask, -1, 0)
|
| 1259 |
+
to_mask = tf.linalg.set_diag(to_mask, diagonal=diag)
|
| 1260 |
+
|
| 1261 |
+
return tf.broadcast_to(input=to_mask, shape=(batch_size, 1, seq_length, seq_length))
|
| 1262 |
+
|
| 1263 |
+
def build(self, input_shape=None):
|
| 1264 |
+
if self.built:
|
| 1265 |
+
return
|
| 1266 |
+
self.built = True
|
| 1267 |
+
if getattr(self, "embeddings", None) is not None:
|
| 1268 |
+
with tf.name_scope(self.embeddings.name):
|
| 1269 |
+
self.embeddings.build(None)
|
| 1270 |
+
if getattr(self, "encoder", None) is not None:
|
| 1271 |
+
with tf.name_scope(self.encoder.name):
|
| 1272 |
+
self.encoder.build(None)
|
| 1273 |
+
if getattr(self, "final_layer_norm", None) is not None:
|
| 1274 |
+
with tf.name_scope(self.final_layer_norm.name):
|
| 1275 |
+
self.final_layer_norm.build([None, None, self.embed_dim])
|
| 1276 |
+
|
| 1277 |
+
|
| 1278 |
+
# Adapted from transformers.models.clip.modeling_tf_clip.TFCLIPVisionTransformer
|
| 1279 |
+
class TFGroupViTVisionTransformer(keras.layers.Layer):
|
| 1280 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs):
|
| 1281 |
+
super().__init__(**kwargs)
|
| 1282 |
+
|
| 1283 |
+
self.embeddings = TFGroupViTVisionEmbeddings(config, name="embeddings")
|
| 1284 |
+
self.encoder = TFGroupViTVisionEncoder(config, name="encoder")
|
| 1285 |
+
self.layernorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layernorm")
|
| 1286 |
+
self.embed_dim = config.hidden_size
|
| 1287 |
+
|
| 1288 |
+
def call(
|
| 1289 |
+
self,
|
| 1290 |
+
pixel_values: TFModelInputType,
|
| 1291 |
+
output_attentions: bool,
|
| 1292 |
+
output_hidden_states: bool,
|
| 1293 |
+
return_dict: bool,
|
| 1294 |
+
training: bool = False,
|
| 1295 |
+
) -> tuple | TFBaseModelOutputWithPooling:
|
| 1296 |
+
embedding_output = self.embeddings(pixel_values)
|
| 1297 |
+
|
| 1298 |
+
encoder_outputs = self.encoder(
|
| 1299 |
+
hidden_states=embedding_output,
|
| 1300 |
+
output_hidden_states=output_hidden_states,
|
| 1301 |
+
output_attentions=output_attentions,
|
| 1302 |
+
return_dict=return_dict,
|
| 1303 |
+
)
|
| 1304 |
+
|
| 1305 |
+
last_hidden_state = encoder_outputs[0]
|
| 1306 |
+
|
| 1307 |
+
# normalize the last hidden state
|
| 1308 |
+
last_hidden_state = self.layernorm(last_hidden_state)
|
| 1309 |
+
pooled_output = tf.math.reduce_mean(last_hidden_state, axis=1)
|
| 1310 |
+
|
| 1311 |
+
if not return_dict:
|
| 1312 |
+
return (last_hidden_state, pooled_output) + encoder_outputs[1:]
|
| 1313 |
+
|
| 1314 |
+
return TFBaseModelOutputWithPooling(
|
| 1315 |
+
last_hidden_state=last_hidden_state,
|
| 1316 |
+
pooler_output=pooled_output,
|
| 1317 |
+
hidden_states=encoder_outputs.hidden_states,
|
| 1318 |
+
attentions=encoder_outputs.attentions,
|
| 1319 |
+
)
|
| 1320 |
+
|
| 1321 |
+
def build(self, input_shape=None):
|
| 1322 |
+
if self.built:
|
| 1323 |
+
return
|
| 1324 |
+
self.built = True
|
| 1325 |
+
if getattr(self, "embeddings", None) is not None:
|
| 1326 |
+
with tf.name_scope(self.embeddings.name):
|
| 1327 |
+
self.embeddings.build(None)
|
| 1328 |
+
if getattr(self, "encoder", None) is not None:
|
| 1329 |
+
with tf.name_scope(self.encoder.name):
|
| 1330 |
+
self.encoder.build(None)
|
| 1331 |
+
if getattr(self, "layernorm", None) is not None:
|
| 1332 |
+
with tf.name_scope(self.layernorm.name):
|
| 1333 |
+
self.layernorm.build([None, None, self.embed_dim])
|
| 1334 |
+
|
| 1335 |
+
|
| 1336 |
+
@keras_serializable
|
| 1337 |
+
# Copied from transformers.models.clip.modeling_tf_clip.TFCLIPTextMainLayer with CLIP->GroupViT
|
| 1338 |
+
class TFGroupViTTextMainLayer(keras.layers.Layer):
|
| 1339 |
+
config_class = GroupViTTextConfig
|
| 1340 |
+
|
| 1341 |
+
def __init__(self, config: GroupViTTextConfig, **kwargs):
|
| 1342 |
+
super().__init__(**kwargs)
|
| 1343 |
+
self.config = config
|
| 1344 |
+
self.text_model = TFGroupViTTextTransformer(config, name="text_model")
|
| 1345 |
+
|
| 1346 |
+
def get_input_embeddings(self) -> keras.layers.Layer:
|
| 1347 |
+
return self.text_model.embeddings
|
| 1348 |
+
|
| 1349 |
+
def set_input_embeddings(self, value: tf.Variable):
|
| 1350 |
+
self.text_model.embeddings.weight = value
|
| 1351 |
+
self.text_model.embeddings.vocab_size = shape_list(value)[0]
|
| 1352 |
+
|
| 1353 |
+
@unpack_inputs
|
| 1354 |
+
def call(
|
| 1355 |
+
self,
|
| 1356 |
+
input_ids: TFModelInputType | None = None,
|
| 1357 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 1358 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 1359 |
+
output_attentions: bool | None = None,
|
| 1360 |
+
output_hidden_states: bool | None = None,
|
| 1361 |
+
return_dict: bool | None = None,
|
| 1362 |
+
training: bool = False,
|
| 1363 |
+
) -> TFBaseModelOutputWithPooling | tuple[tf.Tensor]:
|
| 1364 |
+
if input_ids is None:
|
| 1365 |
+
raise ValueError("You have to specify input_ids")
|
| 1366 |
+
|
| 1367 |
+
input_shape = shape_list(input_ids)
|
| 1368 |
+
|
| 1369 |
+
if attention_mask is None:
|
| 1370 |
+
attention_mask = tf.fill(dims=input_shape, value=1)
|
| 1371 |
+
|
| 1372 |
+
text_model_outputs = self.text_model(
|
| 1373 |
+
input_ids=input_ids,
|
| 1374 |
+
attention_mask=attention_mask,
|
| 1375 |
+
position_ids=position_ids,
|
| 1376 |
+
output_attentions=output_attentions,
|
| 1377 |
+
output_hidden_states=output_hidden_states,
|
| 1378 |
+
return_dict=return_dict,
|
| 1379 |
+
training=training,
|
| 1380 |
+
)
|
| 1381 |
+
|
| 1382 |
+
return text_model_outputs
|
| 1383 |
+
|
| 1384 |
+
def build(self, input_shape=None):
|
| 1385 |
+
if self.built:
|
| 1386 |
+
return
|
| 1387 |
+
self.built = True
|
| 1388 |
+
if getattr(self, "text_model", None) is not None:
|
| 1389 |
+
with tf.name_scope(self.text_model.name):
|
| 1390 |
+
self.text_model.build(None)
|
| 1391 |
+
|
| 1392 |
+
|
| 1393 |
+
@keras_serializable
|
| 1394 |
+
# Copied from transformers.models.clip.modeling_tf_clip.TFCLIPVisionMainLayer with CLIP->GroupViT
|
| 1395 |
+
class TFGroupViTVisionMainLayer(keras.layers.Layer):
|
| 1396 |
+
config_class = GroupViTVisionConfig
|
| 1397 |
+
|
| 1398 |
+
def __init__(self, config: GroupViTVisionConfig, **kwargs):
|
| 1399 |
+
super().__init__(**kwargs)
|
| 1400 |
+
self.config = config
|
| 1401 |
+
self.vision_model = TFGroupViTVisionTransformer(config, name="vision_model")
|
| 1402 |
+
|
| 1403 |
+
def get_input_embeddings(self) -> keras.layers.Layer:
|
| 1404 |
+
return self.vision_model.embeddings
|
| 1405 |
+
|
| 1406 |
+
@unpack_inputs
|
| 1407 |
+
def call(
|
| 1408 |
+
self,
|
| 1409 |
+
pixel_values: TFModelInputType | None = None,
|
| 1410 |
+
output_attentions: bool | None = None,
|
| 1411 |
+
output_hidden_states: bool | None = None,
|
| 1412 |
+
return_dict: bool | None = None,
|
| 1413 |
+
training: bool = False,
|
| 1414 |
+
) -> TFBaseModelOutputWithPooling | tuple[tf.Tensor]:
|
| 1415 |
+
if pixel_values is None:
|
| 1416 |
+
raise ValueError("You have to specify pixel_values")
|
| 1417 |
+
|
| 1418 |
+
vision_model_outputs = self.vision_model(
|
| 1419 |
+
pixel_values=pixel_values,
|
| 1420 |
+
output_attentions=output_attentions,
|
| 1421 |
+
output_hidden_states=output_hidden_states,
|
| 1422 |
+
return_dict=return_dict,
|
| 1423 |
+
training=training,
|
| 1424 |
+
)
|
| 1425 |
+
|
| 1426 |
+
return vision_model_outputs
|
| 1427 |
+
|
| 1428 |
+
def build(self, input_shape=None):
|
| 1429 |
+
if self.built:
|
| 1430 |
+
return
|
| 1431 |
+
self.built = True
|
| 1432 |
+
if getattr(self, "vision_model", None) is not None:
|
| 1433 |
+
with tf.name_scope(self.vision_model.name):
|
| 1434 |
+
self.vision_model.build(None)
|
| 1435 |
+
|
| 1436 |
+
|
| 1437 |
+
@keras_serializable
|
| 1438 |
+
# Adapted from transformers.models.clip.modeling_tf_clip.TFCLIPMainLayer
|
| 1439 |
+
class TFGroupViTMainLayer(keras.layers.Layer):
|
| 1440 |
+
config_class = GroupViTConfig
|
| 1441 |
+
|
| 1442 |
+
def __init__(self, config: GroupViTConfig, **kwargs):
|
| 1443 |
+
super().__init__(**kwargs)
|
| 1444 |
+
|
| 1445 |
+
if not isinstance(config.text_config, GroupViTTextConfig):
|
| 1446 |
+
raise TypeError(
|
| 1447 |
+
"config.text_config is expected to be of type GroupViTTextConfig but is of type"
|
| 1448 |
+
f" {type(config.text_config)}."
|
| 1449 |
+
)
|
| 1450 |
+
|
| 1451 |
+
if not isinstance(config.vision_config, GroupViTVisionConfig):
|
| 1452 |
+
raise TypeError(
|
| 1453 |
+
"config.vision_config is expected to be of type GroupViTVisionConfig but is of type"
|
| 1454 |
+
f" {type(config.vision_config)}."
|
| 1455 |
+
)
|
| 1456 |
+
|
| 1457 |
+
self.config = config
|
| 1458 |
+
|
| 1459 |
+
text_config = config.text_config
|
| 1460 |
+
vision_config = config.vision_config
|
| 1461 |
+
|
| 1462 |
+
self.projection_dim = config.projection_dim
|
| 1463 |
+
self.projection_intermediate_dim = config.projection_intermediate_dim
|
| 1464 |
+
self.text_embed_dim = text_config.hidden_size
|
| 1465 |
+
self.vision_embed_dim = vision_config.hidden_size
|
| 1466 |
+
|
| 1467 |
+
self.text_model = TFGroupViTTextTransformer(text_config, name="text_model")
|
| 1468 |
+
self.vision_model = TFGroupViTVisionTransformer(vision_config, name="vision_model")
|
| 1469 |
+
|
| 1470 |
+
self.visual_projection = [
|
| 1471 |
+
keras.layers.Dense(self.projection_intermediate_dim, name="visual_projection.0"),
|
| 1472 |
+
keras.layers.BatchNormalization(name="visual_projection.1", momentum=0.9, epsilon=1e-5),
|
| 1473 |
+
keras.layers.ReLU(name="visual_projection.2"),
|
| 1474 |
+
keras.layers.Dense(self.projection_dim, name="visual_projection.3"),
|
| 1475 |
+
]
|
| 1476 |
+
self.text_projection = [
|
| 1477 |
+
keras.layers.Dense(self.projection_intermediate_dim, name="text_projection.0"),
|
| 1478 |
+
keras.layers.BatchNormalization(name="text_projection.1", momentum=0.9, epsilon=1e-5),
|
| 1479 |
+
keras.layers.ReLU(name="text_projection.2"),
|
| 1480 |
+
keras.layers.Dense(self.projection_dim, name="text_projection.3"),
|
| 1481 |
+
]
|
| 1482 |
+
|
| 1483 |
+
def build(self, input_shape=None):
|
| 1484 |
+
self.logit_scale = self.add_weight(
|
| 1485 |
+
shape=(1,),
|
| 1486 |
+
initializer=keras.initializers.Constant(self.config.logit_scale_init_value),
|
| 1487 |
+
trainable=True,
|
| 1488 |
+
name="logit_scale",
|
| 1489 |
+
)
|
| 1490 |
+
|
| 1491 |
+
if self.built:
|
| 1492 |
+
return
|
| 1493 |
+
self.built = True
|
| 1494 |
+
if getattr(self, "text_model", None) is not None:
|
| 1495 |
+
with tf.name_scope(self.text_model.name):
|
| 1496 |
+
self.text_model.build(None)
|
| 1497 |
+
if getattr(self, "vision_model", None) is not None:
|
| 1498 |
+
with tf.name_scope(self.vision_model.name):
|
| 1499 |
+
self.vision_model.build(None)
|
| 1500 |
+
if getattr(self, "visual_projection", None) is not None:
|
| 1501 |
+
with tf.name_scope(self.visual_projection[0].name):
|
| 1502 |
+
self.visual_projection[0].build([None, None, None, self.vision_embed_dim])
|
| 1503 |
+
with tf.name_scope(self.visual_projection[1].name):
|
| 1504 |
+
self.visual_projection[1].build((None, self.projection_intermediate_dim))
|
| 1505 |
+
with tf.name_scope(self.visual_projection[3].name):
|
| 1506 |
+
self.visual_projection[3].build([None, None, None, self.projection_intermediate_dim])
|
| 1507 |
+
if getattr(self, "text_projection", None) is not None:
|
| 1508 |
+
with tf.name_scope(self.text_projection[0].name):
|
| 1509 |
+
self.text_projection[0].build([None, None, None, self.text_embed_dim])
|
| 1510 |
+
with tf.name_scope(self.text_projection[1].name):
|
| 1511 |
+
self.text_projection[1].build((None, self.projection_intermediate_dim))
|
| 1512 |
+
with tf.name_scope(self.text_projection[3].name):
|
| 1513 |
+
self.text_projection[3].build([None, None, None, self.projection_intermediate_dim])
|
| 1514 |
+
|
| 1515 |
+
@unpack_inputs
|
| 1516 |
+
def get_text_features(
|
| 1517 |
+
self,
|
| 1518 |
+
input_ids: TFModelInputType | None = None,
|
| 1519 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 1520 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 1521 |
+
output_attentions: bool | None = None,
|
| 1522 |
+
output_hidden_states: bool | None = None,
|
| 1523 |
+
return_dict: bool | None = None,
|
| 1524 |
+
training: bool = False,
|
| 1525 |
+
) -> tf.Tensor:
|
| 1526 |
+
if input_ids is None:
|
| 1527 |
+
raise ValueError("You have to specify either input_ids")
|
| 1528 |
+
|
| 1529 |
+
input_shape = shape_list(input_ids)
|
| 1530 |
+
|
| 1531 |
+
if attention_mask is None:
|
| 1532 |
+
attention_mask = tf.fill(dims=input_shape, value=1)
|
| 1533 |
+
|
| 1534 |
+
text_outputs = self.text_model(
|
| 1535 |
+
input_ids=input_ids,
|
| 1536 |
+
attention_mask=attention_mask,
|
| 1537 |
+
position_ids=position_ids,
|
| 1538 |
+
output_attentions=output_attentions,
|
| 1539 |
+
output_hidden_states=output_hidden_states,
|
| 1540 |
+
return_dict=return_dict,
|
| 1541 |
+
training=training,
|
| 1542 |
+
)
|
| 1543 |
+
|
| 1544 |
+
pooled_output = text_outputs[1]
|
| 1545 |
+
for layer in self.text_projection:
|
| 1546 |
+
pooled_output = layer(pooled_output)
|
| 1547 |
+
|
| 1548 |
+
text_features = pooled_output
|
| 1549 |
+
return text_features
|
| 1550 |
+
|
| 1551 |
+
@unpack_inputs
|
| 1552 |
+
def get_image_features(
|
| 1553 |
+
self,
|
| 1554 |
+
pixel_values: TFModelInputType | None = None,
|
| 1555 |
+
output_attentions: bool | None = None,
|
| 1556 |
+
output_hidden_states: bool | None = None,
|
| 1557 |
+
return_dict: bool | None = None,
|
| 1558 |
+
training: bool = False,
|
| 1559 |
+
) -> tf.Tensor:
|
| 1560 |
+
if pixel_values is None:
|
| 1561 |
+
raise ValueError("You have to specify pixel_values")
|
| 1562 |
+
|
| 1563 |
+
vision_outputs = self.vision_model(
|
| 1564 |
+
pixel_values=pixel_values,
|
| 1565 |
+
output_attentions=output_attentions,
|
| 1566 |
+
output_hidden_states=output_hidden_states,
|
| 1567 |
+
return_dict=return_dict,
|
| 1568 |
+
training=training,
|
| 1569 |
+
)
|
| 1570 |
+
|
| 1571 |
+
pooled_output = vision_outputs[1]
|
| 1572 |
+
for layer in self.visual_projection:
|
| 1573 |
+
pooled_output = layer(pooled_output)
|
| 1574 |
+
|
| 1575 |
+
image_features = pooled_output
|
| 1576 |
+
return image_features
|
| 1577 |
+
|
| 1578 |
+
@unpack_inputs
|
| 1579 |
+
def call(
|
| 1580 |
+
self,
|
| 1581 |
+
input_ids: TFModelInputType | None = None,
|
| 1582 |
+
pixel_values: TFModelInputType | None = None,
|
| 1583 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 1584 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 1585 |
+
return_loss: bool | None = None,
|
| 1586 |
+
output_attentions: bool | None = None,
|
| 1587 |
+
output_hidden_states: bool | None = None,
|
| 1588 |
+
output_segmentation: bool | None = None,
|
| 1589 |
+
return_dict: bool | None = None,
|
| 1590 |
+
training: bool = False,
|
| 1591 |
+
) -> TFGroupViTModelOutput | tuple[tf.Tensor]:
|
| 1592 |
+
if input_ids is None:
|
| 1593 |
+
raise ValueError("You have to specify either input_ids")
|
| 1594 |
+
if pixel_values is None:
|
| 1595 |
+
raise ValueError("You have to specify pixel_values")
|
| 1596 |
+
|
| 1597 |
+
input_shape = shape_list(input_ids)
|
| 1598 |
+
|
| 1599 |
+
if attention_mask is None:
|
| 1600 |
+
attention_mask = tf.fill(dims=input_shape, value=1)
|
| 1601 |
+
if output_segmentation:
|
| 1602 |
+
output_attentions = True
|
| 1603 |
+
vision_outputs = self.vision_model(
|
| 1604 |
+
pixel_values=pixel_values,
|
| 1605 |
+
output_attentions=output_attentions,
|
| 1606 |
+
output_hidden_states=output_hidden_states,
|
| 1607 |
+
return_dict=return_dict,
|
| 1608 |
+
training=training,
|
| 1609 |
+
)
|
| 1610 |
+
|
| 1611 |
+
text_outputs = self.text_model(
|
| 1612 |
+
input_ids=input_ids,
|
| 1613 |
+
attention_mask=attention_mask,
|
| 1614 |
+
position_ids=position_ids,
|
| 1615 |
+
output_attentions=output_attentions,
|
| 1616 |
+
output_hidden_states=output_hidden_states,
|
| 1617 |
+
return_dict=return_dict,
|
| 1618 |
+
training=training,
|
| 1619 |
+
)
|
| 1620 |
+
|
| 1621 |
+
image_embeds = vision_outputs[1]
|
| 1622 |
+
for layer in self.visual_projection:
|
| 1623 |
+
image_embeds = layer(image_embeds)
|
| 1624 |
+
|
| 1625 |
+
text_embeds = text_outputs[1]
|
| 1626 |
+
for layer in self.text_projection:
|
| 1627 |
+
text_embeds = layer(text_embeds)
|
| 1628 |
+
|
| 1629 |
+
# normalized features
|
| 1630 |
+
image_embeds = image_embeds / tf.norm(image_embeds, axis=-1, keepdims=True)
|
| 1631 |
+
text_embeds = text_embeds / tf.norm(text_embeds, axis=-1, keepdims=True)
|
| 1632 |
+
|
| 1633 |
+
# cosine similarity as logits
|
| 1634 |
+
logit_scale = tf.math.exp(self.logit_scale)
|
| 1635 |
+
logits_per_text = tf.matmul(text_embeds, image_embeds, transpose_b=True) * logit_scale
|
| 1636 |
+
logits_per_image = tf.transpose(logits_per_text)
|
| 1637 |
+
|
| 1638 |
+
seg_logits = None
|
| 1639 |
+
if output_segmentation:
|
| 1640 |
+
# grouped features
|
| 1641 |
+
# [batch_size_image, num_group, hidden_size]
|
| 1642 |
+
image_group_embeds = vision_outputs[0]
|
| 1643 |
+
# [batch_size_image*num_group, hidden_size]
|
| 1644 |
+
image_group_embeds = tf.reshape(image_group_embeds, shape=(-1, shape_list(image_group_embeds)[-1]))
|
| 1645 |
+
for layer in self.visual_projection:
|
| 1646 |
+
image_group_embeds = layer(image_group_embeds)
|
| 1647 |
+
if output_hidden_states:
|
| 1648 |
+
attentions = vision_outputs[3]
|
| 1649 |
+
else:
|
| 1650 |
+
attentions = vision_outputs[2]
|
| 1651 |
+
# [batch_size_image, num_group, height, width]
|
| 1652 |
+
grouping = get_grouping_from_attentions(attentions, pixel_values.shape[2:])
|
| 1653 |
+
|
| 1654 |
+
# normalized features
|
| 1655 |
+
image_group_embeds = image_group_embeds / tf.norm(
|
| 1656 |
+
tensor=image_group_embeds, ord="euclidean", axis=-1, keepdims=True
|
| 1657 |
+
)
|
| 1658 |
+
# [batch_size_image x num_group, batch_size_text]
|
| 1659 |
+
logits_per_image_group = tf.matmul(image_group_embeds, text_embeds, transpose_b=True) * logit_scale
|
| 1660 |
+
# [batch_size_image, batch_size_text, num_group]
|
| 1661 |
+
logits_per_image_group = tf.reshape(
|
| 1662 |
+
logits_per_image_group, shape=(image_embeds.shape[0], -1, text_embeds.shape[0])
|
| 1663 |
+
)
|
| 1664 |
+
logits_per_image_group = tf.transpose(logits_per_image_group, perm=(0, 2, 1))
|
| 1665 |
+
|
| 1666 |
+
# [batch_size_image, batch_size_text, height x width]
|
| 1667 |
+
flatten_grouping = tf.reshape(grouping, shape=(shape_list(grouping)[0], shape_list(grouping)[1], -1))
|
| 1668 |
+
|
| 1669 |
+
# [batch_size_image, batch_size_text, height, width]
|
| 1670 |
+
seg_logits = tf.matmul(logits_per_image_group, flatten_grouping) * logit_scale
|
| 1671 |
+
seg_logits = tf.reshape(
|
| 1672 |
+
seg_logits, shape=(seg_logits.shape[0], seg_logits.shape[1], grouping.shape[2], grouping.shape[3])
|
| 1673 |
+
)
|
| 1674 |
+
|
| 1675 |
+
loss = None
|
| 1676 |
+
if return_loss:
|
| 1677 |
+
loss = groupvit_loss(logits_per_text)[None, ...]
|
| 1678 |
+
|
| 1679 |
+
if not return_dict:
|
| 1680 |
+
if seg_logits is not None:
|
| 1681 |
+
output = (
|
| 1682 |
+
logits_per_image,
|
| 1683 |
+
logits_per_text,
|
| 1684 |
+
seg_logits,
|
| 1685 |
+
text_embeds,
|
| 1686 |
+
image_embeds,
|
| 1687 |
+
text_outputs,
|
| 1688 |
+
vision_outputs,
|
| 1689 |
+
)
|
| 1690 |
+
else:
|
| 1691 |
+
output = (logits_per_image, logits_per_text, text_embeds, image_embeds, text_outputs, vision_outputs)
|
| 1692 |
+
return ((loss,) + output) if loss is not None else output
|
| 1693 |
+
|
| 1694 |
+
return TFGroupViTModelOutput(
|
| 1695 |
+
loss=loss,
|
| 1696 |
+
logits_per_image=logits_per_image,
|
| 1697 |
+
logits_per_text=logits_per_text,
|
| 1698 |
+
segmentation_logits=seg_logits,
|
| 1699 |
+
text_embeds=text_embeds,
|
| 1700 |
+
image_embeds=image_embeds,
|
| 1701 |
+
text_model_output=text_outputs,
|
| 1702 |
+
vision_model_output=vision_outputs,
|
| 1703 |
+
)
|
| 1704 |
+
|
| 1705 |
+
|
| 1706 |
+
class TFGroupViTPreTrainedModel(TFPreTrainedModel):
|
| 1707 |
+
"""
|
| 1708 |
+
An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
|
| 1709 |
+
models.
|
| 1710 |
+
"""
|
| 1711 |
+
|
| 1712 |
+
config_class = GroupViTConfig
|
| 1713 |
+
base_model_prefix = "groupvit"
|
| 1714 |
+
|
| 1715 |
+
|
| 1716 |
+
GROUPVIT_START_DOCSTRING = r"""
|
| 1717 |
+
This model inherits from [`TFPreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 1718 |
+
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 1719 |
+
etc.)
|
| 1720 |
+
|
| 1721 |
+
This model is also a [keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it
|
| 1722 |
+
as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and
|
| 1723 |
+
behavior.
|
| 1724 |
+
|
| 1725 |
+
<Tip>
|
| 1726 |
+
|
| 1727 |
+
TF 2.0 models accepts two formats as inputs:
|
| 1728 |
+
|
| 1729 |
+
- having all inputs as keyword arguments (like PyTorch models), or
|
| 1730 |
+
- having all inputs as a list, tuple or dict in the first positional arguments.
|
| 1731 |
+
|
| 1732 |
+
This second option is useful when using [`keras.Model.fit`] method which currently requires having all the
|
| 1733 |
+
tensors in the first argument of the model call function: `model(inputs)`.
|
| 1734 |
+
|
| 1735 |
+
If you choose this second option, there are three possibilities you can use to gather all the input Tensors in the
|
| 1736 |
+
first positional argument :
|
| 1737 |
+
|
| 1738 |
+
- a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
|
| 1739 |
+
- a list of varying length with one or several input Tensors IN THE ORDER given in the docstring:
|
| 1740 |
+
`model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
|
| 1741 |
+
- a dictionary with one or several input Tensors associated to the input names given in the docstring:
|
| 1742 |
+
`model({"input_ids": input_ids, "token_type_ids": token_type_ids})`
|
| 1743 |
+
|
| 1744 |
+
</Tip>
|
| 1745 |
+
|
| 1746 |
+
Args:
|
| 1747 |
+
config ([`GroupViTConfig`]): Model configuration class with all the parameters of the model.
|
| 1748 |
+
Initializing with a config file does not load the weights associated with the model, only the
|
| 1749 |
+
configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
| 1750 |
+
"""
|
| 1751 |
+
|
| 1752 |
+
GROUPVIT_TEXT_INPUTS_DOCSTRING = r"""
|
| 1753 |
+
Args:
|
| 1754 |
+
input_ids (`np.ndarray`, `tf.Tensor`, `list[tf.Tensor]` ``dict[str, tf.Tensor]` or `dict[str, np.ndarray]` and each example must have the shape `({0})`):
|
| 1755 |
+
Indices of input sequence tokens in the vocabulary.
|
| 1756 |
+
|
| 1757 |
+
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.__call__`] and
|
| 1758 |
+
[`PreTrainedTokenizer.encode`] for details.
|
| 1759 |
+
|
| 1760 |
+
[What are input IDs?](../glossary#input-ids)
|
| 1761 |
+
attention_mask (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1762 |
+
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
| 1763 |
+
|
| 1764 |
+
- 1 for tokens that are **not masked**,
|
| 1765 |
+
- 0 for tokens that are **masked**.
|
| 1766 |
+
|
| 1767 |
+
[What are attention masks?](../glossary#attention-mask)
|
| 1768 |
+
position_ids (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1769 |
+
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
| 1770 |
+
config.max_position_embeddings - 1]`.
|
| 1771 |
+
|
| 1772 |
+
[What are position IDs?](../glossary#position-ids)
|
| 1773 |
+
output_attentions (`bool`, *optional*):
|
| 1774 |
+
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
| 1775 |
+
tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the
|
| 1776 |
+
config will be used instead.
|
| 1777 |
+
output_hidden_states (`bool`, *optional*):
|
| 1778 |
+
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
| 1779 |
+
more detail. This argument can be used only in eager mode, in graph mode the value in the config will be
|
| 1780 |
+
used instead.
|
| 1781 |
+
return_dict (`bool`, *optional*):
|
| 1782 |
+
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. This argument can be used in
|
| 1783 |
+
eager mode, in graph mode the value will always be set to True.
|
| 1784 |
+
training (`bool`, *optional*, defaults to `False``):
|
| 1785 |
+
Whether or not to use the model in training mode (some modules like dropout modules have different
|
| 1786 |
+
behaviors between training and evaluation).
|
| 1787 |
+
"""
|
| 1788 |
+
|
| 1789 |
+
GROUPVIT_VISION_INPUTS_DOCSTRING = r"""
|
| 1790 |
+
Args:
|
| 1791 |
+
pixel_values (`np.ndarray`, `tf.Tensor`, `list[tf.Tensor]`, `dict[str, tf.Tensor]` or `dict[str, np.ndarray]` and each example must have the shape `(batch_size, num_channels, height, width)`):
|
| 1792 |
+
Pixel values. Pixel values can be obtained using [`AutoImageProcessor`]. See
|
| 1793 |
+
[`CLIPImageProcessor.__call__`] for details.
|
| 1794 |
+
output_attentions (`bool`, *optional*):
|
| 1795 |
+
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
| 1796 |
+
tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the
|
| 1797 |
+
config will be used instead.
|
| 1798 |
+
output_hidden_states (`bool`, *optional*):
|
| 1799 |
+
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
| 1800 |
+
more detail. This argument can be used only in eager mode, in graph mode the value in the config will be
|
| 1801 |
+
used instead.
|
| 1802 |
+
return_dict (`bool`, *optional*):
|
| 1803 |
+
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. This argument can be used in
|
| 1804 |
+
eager mode, in graph mode the value will always be set to True.
|
| 1805 |
+
training (`bool`, *optional*, defaults to `False``):
|
| 1806 |
+
Whether or not to use the model in training mode (some modules like dropout modules have different
|
| 1807 |
+
behaviors between training and evaluation).
|
| 1808 |
+
"""
|
| 1809 |
+
|
| 1810 |
+
GROUPVIT_INPUTS_DOCSTRING = r"""
|
| 1811 |
+
Args:
|
| 1812 |
+
input_ids (`np.ndarray`, `tf.Tensor`, `list[tf.Tensor]` ``dict[str, tf.Tensor]` or `dict[str, np.ndarray]` and each example must have the shape `({0})`):
|
| 1813 |
+
Indices of input sequence tokens in the vocabulary.
|
| 1814 |
+
|
| 1815 |
+
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.__call__`] and
|
| 1816 |
+
[`PreTrainedTokenizer.encode`] for details.
|
| 1817 |
+
|
| 1818 |
+
[What are input IDs?](../glossary#input-ids)
|
| 1819 |
+
pixel_values (`np.ndarray`, `tf.Tensor`, `list[tf.Tensor]` `dict[str, tf.Tensor]` or `dict[str, np.ndarray]` and each example must have the shape `(batch_size, num_channels, height, width)`):
|
| 1820 |
+
Pixel values. Pixel values can be obtained using [`AutoImageProcessor`]. See
|
| 1821 |
+
[`CLIPImageProcessor.__call__`] for details.
|
| 1822 |
+
attention_mask (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1823 |
+
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
| 1824 |
+
|
| 1825 |
+
- 1 for tokens that are **not masked**,
|
| 1826 |
+
- 0 for tokens that are **masked**.
|
| 1827 |
+
|
| 1828 |
+
[What are attention masks?](../glossary#attention-mask)
|
| 1829 |
+
position_ids (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1830 |
+
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
| 1831 |
+
config.max_position_embeddings - 1]`.
|
| 1832 |
+
|
| 1833 |
+
[What are position IDs?](../glossary#position-ids)
|
| 1834 |
+
return_loss (`bool`, *optional*):
|
| 1835 |
+
Whether or not to return the contrastive loss.
|
| 1836 |
+
output_attentions (`bool`, *optional*):
|
| 1837 |
+
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
| 1838 |
+
tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the
|
| 1839 |
+
config will be used instead.
|
| 1840 |
+
output_hidden_states (`bool`, *optional*):
|
| 1841 |
+
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
| 1842 |
+
more detail. This argument can be used only in eager mode, in graph mode the value in the config will be
|
| 1843 |
+
used instead.
|
| 1844 |
+
return_dict (`bool`, *optional*):
|
| 1845 |
+
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. This argument can be used in
|
| 1846 |
+
eager mode, in graph mode the value will always be set to True.
|
| 1847 |
+
training (`bool`, *optional*, defaults to `False``):
|
| 1848 |
+
Whether or not to use the model in training mode (some modules like dropout modules have different
|
| 1849 |
+
behaviors between training and evaluation).
|
| 1850 |
+
"""
|
| 1851 |
+
|
| 1852 |
+
|
| 1853 |
+
class TFGroupViTTextModel(TFGroupViTPreTrainedModel):
|
| 1854 |
+
config_class = GroupViTTextConfig
|
| 1855 |
+
main_input_name = "input_ids"
|
| 1856 |
+
|
| 1857 |
+
def __init__(self, config: GroupViTTextConfig, *inputs, **kwargs):
|
| 1858 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1859 |
+
|
| 1860 |
+
self.groupvit = TFGroupViTTextMainLayer(config, name="groupvit")
|
| 1861 |
+
|
| 1862 |
+
@unpack_inputs
|
| 1863 |
+
@add_start_docstrings_to_model_forward(GROUPVIT_TEXT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
|
| 1864 |
+
@replace_return_docstrings(output_type=TFBaseModelOutputWithPooling, config_class=GroupViTTextConfig)
|
| 1865 |
+
def call(
|
| 1866 |
+
self,
|
| 1867 |
+
input_ids: TFModelInputType | None = None,
|
| 1868 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 1869 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 1870 |
+
output_attentions: bool | None = None,
|
| 1871 |
+
output_hidden_states: bool | None = None,
|
| 1872 |
+
return_dict: bool | None = None,
|
| 1873 |
+
training: bool = False,
|
| 1874 |
+
) -> TFBaseModelOutputWithPooling | tuple[tf.Tensor]:
|
| 1875 |
+
r"""
|
| 1876 |
+
Returns:
|
| 1877 |
+
|
| 1878 |
+
Examples:
|
| 1879 |
+
|
| 1880 |
+
```python
|
| 1881 |
+
>>> from transformers import CLIPTokenizer, TFGroupViTTextModel
|
| 1882 |
+
|
| 1883 |
+
>>> tokenizer = CLIPTokenizer.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 1884 |
+
>>> model = TFGroupViTTextModel.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 1885 |
+
|
| 1886 |
+
>>> inputs = tokenizer(["a photo of a cat", "a photo of a dog"], padding=True, return_tensors="tf")
|
| 1887 |
+
|
| 1888 |
+
>>> outputs = model(**inputs)
|
| 1889 |
+
>>> last_hidden_state = outputs.last_hidden_state
|
| 1890 |
+
>>> pooled_output = outputs.pooler_output # pooled (EOS token) states
|
| 1891 |
+
```"""
|
| 1892 |
+
|
| 1893 |
+
outputs = self.groupvit(
|
| 1894 |
+
input_ids=input_ids,
|
| 1895 |
+
attention_mask=attention_mask,
|
| 1896 |
+
position_ids=position_ids,
|
| 1897 |
+
output_attentions=output_attentions,
|
| 1898 |
+
output_hidden_states=output_hidden_states,
|
| 1899 |
+
return_dict=return_dict,
|
| 1900 |
+
training=training,
|
| 1901 |
+
)
|
| 1902 |
+
|
| 1903 |
+
return outputs
|
| 1904 |
+
|
| 1905 |
+
def build(self, input_shape=None):
|
| 1906 |
+
if self.built:
|
| 1907 |
+
return
|
| 1908 |
+
self.built = True
|
| 1909 |
+
if getattr(self, "groupvit", None) is not None:
|
| 1910 |
+
with tf.name_scope(self.groupvit.name):
|
| 1911 |
+
self.groupvit.build(None)
|
| 1912 |
+
|
| 1913 |
+
|
| 1914 |
+
class TFGroupViTVisionModel(TFGroupViTPreTrainedModel):
|
| 1915 |
+
config_class = GroupViTVisionConfig
|
| 1916 |
+
main_input_name = "pixel_values"
|
| 1917 |
+
|
| 1918 |
+
def __init__(self, config: GroupViTVisionConfig, *inputs, **kwargs):
|
| 1919 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1920 |
+
|
| 1921 |
+
self.groupvit = TFGroupViTVisionMainLayer(config, name="groupvit")
|
| 1922 |
+
|
| 1923 |
+
@unpack_inputs
|
| 1924 |
+
@add_start_docstrings_to_model_forward(GROUPVIT_VISION_INPUTS_DOCSTRING)
|
| 1925 |
+
@replace_return_docstrings(output_type=TFBaseModelOutputWithPooling, config_class=GroupViTVisionConfig)
|
| 1926 |
+
def call(
|
| 1927 |
+
self,
|
| 1928 |
+
pixel_values: TFModelInputType | None = None,
|
| 1929 |
+
output_attentions: bool | None = None,
|
| 1930 |
+
output_hidden_states: bool | None = None,
|
| 1931 |
+
return_dict: bool | None = None,
|
| 1932 |
+
training: bool = False,
|
| 1933 |
+
) -> TFBaseModelOutputWithPooling | tuple[tf.Tensor]:
|
| 1934 |
+
r"""
|
| 1935 |
+
Returns:
|
| 1936 |
+
|
| 1937 |
+
Examples:
|
| 1938 |
+
|
| 1939 |
+
```python
|
| 1940 |
+
>>> from PIL import Image
|
| 1941 |
+
>>> import requests
|
| 1942 |
+
>>> from transformers import AutoProcessor, TFGroupViTVisionModel
|
| 1943 |
+
|
| 1944 |
+
>>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 1945 |
+
>>> model = TFGroupViTVisionModel.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 1946 |
+
|
| 1947 |
+
>>> url = "http://images.cocodataset.org/val2017/000000039769.jpg"
|
| 1948 |
+
>>> image = Image.open(requests.get(url, stream=True).raw)
|
| 1949 |
+
|
| 1950 |
+
>>> inputs = processor(images=image, return_tensors="tf")
|
| 1951 |
+
|
| 1952 |
+
>>> outputs = model(**inputs)
|
| 1953 |
+
>>> last_hidden_state = outputs.last_hidden_state
|
| 1954 |
+
>>> pooled_output = outputs.pooler_output # pooled CLS states
|
| 1955 |
+
```"""
|
| 1956 |
+
|
| 1957 |
+
outputs = self.groupvit(
|
| 1958 |
+
pixel_values=pixel_values,
|
| 1959 |
+
output_attentions=output_attentions,
|
| 1960 |
+
output_hidden_states=output_hidden_states,
|
| 1961 |
+
return_dict=return_dict,
|
| 1962 |
+
training=training,
|
| 1963 |
+
)
|
| 1964 |
+
|
| 1965 |
+
return outputs
|
| 1966 |
+
|
| 1967 |
+
def build(self, input_shape=None):
|
| 1968 |
+
if self.built:
|
| 1969 |
+
return
|
| 1970 |
+
self.built = True
|
| 1971 |
+
if getattr(self, "groupvit", None) is not None:
|
| 1972 |
+
with tf.name_scope(self.groupvit.name):
|
| 1973 |
+
self.groupvit.build(None)
|
| 1974 |
+
|
| 1975 |
+
|
| 1976 |
+
@add_start_docstrings(GROUPVIT_START_DOCSTRING)
|
| 1977 |
+
class TFGroupViTModel(TFGroupViTPreTrainedModel):
|
| 1978 |
+
config_class = GroupViTConfig
|
| 1979 |
+
|
| 1980 |
+
def __init__(self, config: GroupViTConfig, *inputs, **kwargs):
|
| 1981 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1982 |
+
|
| 1983 |
+
self.groupvit = TFGroupViTMainLayer(config, name="groupvit")
|
| 1984 |
+
|
| 1985 |
+
@unpack_inputs
|
| 1986 |
+
@add_start_docstrings_to_model_forward(GROUPVIT_TEXT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
|
| 1987 |
+
def get_text_features(
|
| 1988 |
+
self,
|
| 1989 |
+
input_ids: TFModelInputType | None = None,
|
| 1990 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 1991 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 1992 |
+
output_attentions: bool | None = None,
|
| 1993 |
+
output_hidden_states: bool | None = None,
|
| 1994 |
+
return_dict: bool | None = None,
|
| 1995 |
+
training: bool = False,
|
| 1996 |
+
) -> tf.Tensor:
|
| 1997 |
+
r"""
|
| 1998 |
+
Returns:
|
| 1999 |
+
text_features (`tf.Tensor` of shape `(batch_size, output_dim`): The text embeddings obtained by applying
|
| 2000 |
+
the projection layer to the pooled output of [`TFGroupViTTextModel`].
|
| 2001 |
+
|
| 2002 |
+
Examples:
|
| 2003 |
+
|
| 2004 |
+
```python
|
| 2005 |
+
>>> from transformers import CLIPTokenizer, TFGroupViTModel
|
| 2006 |
+
|
| 2007 |
+
>>> model = TFGroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2008 |
+
>>> tokenizer = CLIPTokenizer.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2009 |
+
|
| 2010 |
+
>>> inputs = tokenizer(["a photo of a cat", "a photo of a dog"], padding=True, return_tensors="tf")
|
| 2011 |
+
>>> text_features = model.get_text_features(**inputs)
|
| 2012 |
+
```"""
|
| 2013 |
+
|
| 2014 |
+
text_features = self.groupvit.get_text_features(
|
| 2015 |
+
input_ids=input_ids,
|
| 2016 |
+
attention_mask=attention_mask,
|
| 2017 |
+
position_ids=position_ids,
|
| 2018 |
+
output_attentions=output_attentions,
|
| 2019 |
+
output_hidden_states=output_hidden_states,
|
| 2020 |
+
return_dict=return_dict,
|
| 2021 |
+
training=training,
|
| 2022 |
+
)
|
| 2023 |
+
|
| 2024 |
+
return text_features
|
| 2025 |
+
|
| 2026 |
+
@unpack_inputs
|
| 2027 |
+
@add_start_docstrings_to_model_forward(GROUPVIT_VISION_INPUTS_DOCSTRING)
|
| 2028 |
+
def get_image_features(
|
| 2029 |
+
self,
|
| 2030 |
+
pixel_values: TFModelInputType | None = None,
|
| 2031 |
+
output_attentions: bool | None = None,
|
| 2032 |
+
output_hidden_states: bool | None = None,
|
| 2033 |
+
return_dict: bool | None = None,
|
| 2034 |
+
training: bool = False,
|
| 2035 |
+
) -> tf.Tensor:
|
| 2036 |
+
r"""
|
| 2037 |
+
Returns:
|
| 2038 |
+
image_features (`tf.Tensor` of shape `(batch_size, output_dim`): The image embeddings obtained by applying
|
| 2039 |
+
the projection layer to the pooled output of [`TFGroupViTVisionModel`].
|
| 2040 |
+
|
| 2041 |
+
Examples:
|
| 2042 |
+
|
| 2043 |
+
```python
|
| 2044 |
+
>>> from PIL import Image
|
| 2045 |
+
>>> import requests
|
| 2046 |
+
>>> from transformers import AutoProcessor, TFGroupViTModel
|
| 2047 |
+
|
| 2048 |
+
>>> model = TFGroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2049 |
+
>>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2050 |
+
|
| 2051 |
+
>>> url = "http://images.cocodataset.org/val2017/000000039769.jpg"
|
| 2052 |
+
>>> image = Image.open(requests.get(url, stream=True).raw)
|
| 2053 |
+
|
| 2054 |
+
>>> inputs = processor(images=image, return_tensors="tf")
|
| 2055 |
+
|
| 2056 |
+
>>> image_features = model.get_image_features(**inputs)
|
| 2057 |
+
```"""
|
| 2058 |
+
|
| 2059 |
+
image_features = self.groupvit.get_image_features(
|
| 2060 |
+
pixel_values=pixel_values,
|
| 2061 |
+
output_attentions=output_attentions,
|
| 2062 |
+
output_hidden_states=output_hidden_states,
|
| 2063 |
+
return_dict=return_dict,
|
| 2064 |
+
training=training,
|
| 2065 |
+
)
|
| 2066 |
+
|
| 2067 |
+
return image_features
|
| 2068 |
+
|
| 2069 |
+
@unpack_inputs
|
| 2070 |
+
@add_start_docstrings_to_model_forward(GROUPVIT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
|
| 2071 |
+
@replace_return_docstrings(output_type=TFGroupViTModelOutput, config_class=GroupViTConfig)
|
| 2072 |
+
def call(
|
| 2073 |
+
self,
|
| 2074 |
+
input_ids: TFModelInputType | None = None,
|
| 2075 |
+
pixel_values: TFModelInputType | None = None,
|
| 2076 |
+
attention_mask: np.ndarray | tf.Tensor | None = None,
|
| 2077 |
+
position_ids: np.ndarray | tf.Tensor | None = None,
|
| 2078 |
+
return_loss: bool | None = None,
|
| 2079 |
+
output_attentions: bool | None = None,
|
| 2080 |
+
output_hidden_states: bool | None = None,
|
| 2081 |
+
output_segmentation: bool | None = None,
|
| 2082 |
+
return_dict: bool | None = None,
|
| 2083 |
+
training: bool = False,
|
| 2084 |
+
) -> TFGroupViTModelOutput | tuple[tf.Tensor]:
|
| 2085 |
+
r"""
|
| 2086 |
+
Returns:
|
| 2087 |
+
|
| 2088 |
+
Examples:
|
| 2089 |
+
|
| 2090 |
+
```python
|
| 2091 |
+
>>> from PIL import Image
|
| 2092 |
+
>>> import requests
|
| 2093 |
+
>>> from transformers import AutoProcessor, TFGroupViTModel
|
| 2094 |
+
>>> import tensorflow as tf
|
| 2095 |
+
|
| 2096 |
+
>>> model = TFGroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2097 |
+
>>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc")
|
| 2098 |
+
|
| 2099 |
+
>>> url = "http://images.cocodataset.org/val2017/000000039769.jpg"
|
| 2100 |
+
>>> image = Image.open(requests.get(url, stream=True).raw)
|
| 2101 |
+
|
| 2102 |
+
>>> inputs = processor(
|
| 2103 |
+
... text=["a photo of a cat", "a photo of a dog"], images=image, return_tensors="tf", padding=True
|
| 2104 |
+
... )
|
| 2105 |
+
|
| 2106 |
+
>>> outputs = model(**inputs)
|
| 2107 |
+
>>> logits_per_image = outputs.logits_per_image # this is the image-text similarity score
|
| 2108 |
+
>>> probs = tf.math.softmax(logits_per_image, axis=1) # we can take the softmax to get the label probabilities
|
| 2109 |
+
```"""
|
| 2110 |
+
|
| 2111 |
+
outputs = self.groupvit(
|
| 2112 |
+
input_ids=input_ids,
|
| 2113 |
+
pixel_values=pixel_values,
|
| 2114 |
+
attention_mask=attention_mask,
|
| 2115 |
+
position_ids=position_ids,
|
| 2116 |
+
return_loss=return_loss,
|
| 2117 |
+
output_attentions=output_attentions,
|
| 2118 |
+
output_hidden_states=output_hidden_states,
|
| 2119 |
+
output_segmentation=output_segmentation,
|
| 2120 |
+
return_dict=return_dict,
|
| 2121 |
+
training=training,
|
| 2122 |
+
)
|
| 2123 |
+
|
| 2124 |
+
return outputs
|
| 2125 |
+
|
| 2126 |
+
def serving_output(self, output: TFGroupViTModelOutput) -> TFGroupViTModelOutput:
|
| 2127 |
+
# TODO: As is this currently fails with saved_model=True, because
|
| 2128 |
+
# TensorFlow cannot trace through nested dataclasses. Reference:
|
| 2129 |
+
# https://github.com/huggingface/transformers/pull/16886
|
| 2130 |
+
return output
|
| 2131 |
+
|
| 2132 |
+
def build(self, input_shape=None):
|
| 2133 |
+
if self.built:
|
| 2134 |
+
return
|
| 2135 |
+
self.built = True
|
| 2136 |
+
if getattr(self, "groupvit", None) is not None:
|
| 2137 |
+
with tf.name_scope(self.groupvit.name):
|
| 2138 |
+
self.groupvit.build(None)
|
| 2139 |
+
|
| 2140 |
+
|
| 2141 |
+
__all__ = ["TFGroupViTModel", "TFGroupViTPreTrainedModel", "TFGroupViTTextModel", "TFGroupViTVisionModel"]
|