File size: 1,559 Bytes
caf79e8 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 |
import cv2
from PIL import Image
import numpy as np
import torch
import torch.nn.functional as F
def gaussian_kernel(kernel_size=3, sigma=1.0, channels=3):
x_coord = torch.arange(kernel_size)
gaussian_1d = torch.exp(-(x_coord - (kernel_size - 1) / 2) ** 2 / (2 * sigma ** 2))
gaussian_1d = gaussian_1d / gaussian_1d.sum()
gaussian_2d = gaussian_1d[:, None] * gaussian_1d[None, :]
kernel = gaussian_2d[None, None, :, :].repeat(channels, 1, 1, 1)
return kernel
def gaussian_filter(latents, kernel_size=3, sigma=1.0):
channels = latents.shape[1]
kernel = gaussian_kernel(kernel_size, sigma, channels).to(latents.device, latents.dtype)
blurred_latents = F.conv2d(latents, kernel, padding=kernel_size//2, groups=channels)
return blurred_latents
def make_coord(shape, ranges=None, flatten=True, device='cpu'):
# Make coordinates at grid centers.
coord_seqs = []
for i, n in enumerate(shape):
if ranges is None:
v0, v1 = -1, 1
else:
v0, v1 = ranges[i]
r = (v1 - v0) / (2 * n)
seq = v0 + r + (2 * r) * torch.arange(n, device=device).float()
coord_seqs.append(seq)
ret = torch.stack(torch.meshgrid(*coord_seqs), dim=-1)
if flatten:
ret = ret.view(-1, ret.shape[-1])
return ret
def apply_canny_detection(image_np, low_threshold=100, high_threshold=200):
gray_image = cv2.cvtColor(image_np, cv2.COLOR_RGB2GRAY)
filtered_image = cv2.Canny(gray_image, low_threshold, high_threshold) # 0 or 255
return filtered_image |