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7501dfb | 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 | import torchvision.transforms as transforms
import torch.nn as nn
import numpy as np
import torch
class Global_crops(nn.Module):
def __init__(self, n_crops, min_cover, last_transform, flip=False):
super().__init__()
self.n_crops = n_crops
self.min_cover = min_cover
transforms_lst = [last_transform]
if flip:
transforms_lst += [transforms.RandomHorizontalFlip()]
self.last_transform = transforms.Compose(transforms_lst)
def forward(self, img):
crops = []
h = img.size[1]
size = int(round(np.random.uniform(self.min_cover * h, h)))
t = transforms.Compose([transforms.RandomCrop(min(size, img.size[0])), self.last_transform])
for _ in range(self.n_crops):
crop = t(img)
crops.append(crop)
return torch.stack(crops)
dino_structure_transforms = transforms.Compose([
transforms.RandomHorizontalFlip(p=0.5),
transforms.RandomApply(
[transforms.ColorJitter(brightness=0.4, contrast=0.4, saturation=0.2, hue=0.1)],
p=0.5
),
transforms.RandomApply([transforms.GaussianBlur(kernel_size=3)], p=0.2)
])
dino_texture_transforms = transforms.Compose([
transforms.RandomHorizontalFlip(p=0.5)
])
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