File size: 9,152 Bytes
f7acea1 |
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 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 |
import cv2
import math
import numpy as np
import os.path as osp
import torch
import torch.utils.data as data
from basicsr.data import degradations as degradations
from basicsr.data.data_util import paths_from_folder
from basicsr.data.transforms import augment
from basicsr.utils import FileClient, get_root_logger, imfrombytes, img2tensor
from basicsr.utils.registry import DATASET_REGISTRY
from torchvision.transforms.functional import (adjust_brightness, adjust_contrast, adjust_hue, adjust_saturation,
normalize)
@DATASET_REGISTRY.register()
class FFHQDegradationDataset(data.Dataset):
def __init__(self, opt):
super(FFHQDegradationDataset, self).__init__()
self.opt = opt
# file client (io backend)
self.file_client = None
self.io_backend_opt = opt['io_backend']
self.gt_folder = opt['dataroot_gt']
self.mean = opt['mean']
self.std = opt['std']
self.out_size = opt['out_size']
self.crop_components = opt.get('crop_components', False) # facial components
self.eye_enlarge_ratio = opt.get('eye_enlarge_ratio', 1)
if self.crop_components:
self.components_list = torch.load(opt.get('component_path'))
if self.io_backend_opt['type'] == 'lmdb':
self.io_backend_opt['db_paths'] = self.gt_folder
if not self.gt_folder.endswith('.lmdb'):
raise ValueError(f"'dataroot_gt' should end with '.lmdb', but received {self.gt_folder}")
with open(osp.join(self.gt_folder, 'meta_info.txt')) as fin:
self.paths = [line.split('.')[0] for line in fin]
else:
self.paths = paths_from_folder(self.gt_folder)
# degradations
self.blur_kernel_size = opt['blur_kernel_size']
self.kernel_list = opt['kernel_list']
self.kernel_prob = opt['kernel_prob']
self.blur_sigma = opt['blur_sigma']
self.downsample_range = opt['downsample_range']
self.noise_range = opt['noise_range']
self.jpeg_range = opt['jpeg_range']
# color jitter
self.color_jitter_prob = opt.get('color_jitter_prob')
self.color_jitter_pt_prob = opt.get('color_jitter_pt_prob')
self.color_jitter_shift = opt.get('color_jitter_shift', 20)
# to gray
self.gray_prob = opt.get('gray_prob')
logger = get_root_logger()
logger.info(f'Blur: blur_kernel_size {self.blur_kernel_size}, '
f'sigma: [{", ".join(map(str, self.blur_sigma))}]')
logger.info(f'Downsample: downsample_range [{", ".join(map(str, self.downsample_range))}]')
logger.info(f'Noise: [{", ".join(map(str, self.noise_range))}]')
logger.info(f'JPEG compression: [{", ".join(map(str, self.jpeg_range))}]')
if self.color_jitter_prob is not None:
logger.info(f'Use random color jitter. Prob: {self.color_jitter_prob}, '
f'shift: {self.color_jitter_shift}')
if self.gray_prob is not None:
logger.info(f'Use random gray. Prob: {self.gray_prob}')
self.color_jitter_shift /= 255.
@staticmethod
def color_jitter(img, shift):
jitter_val = np.random.uniform(-shift, shift, 3).astype(np.float32)
img = img + jitter_val
img = np.clip(img, 0, 1)
return img
@staticmethod
def color_jitter_pt(img, brightness, contrast, saturation, hue):
fn_idx = torch.randperm(4)
for fn_id in fn_idx:
if fn_id == 0 and brightness is not None:
brightness_factor = torch.tensor(1.0).uniform_(brightness[0], brightness[1]).item()
img = adjust_brightness(img, brightness_factor)
if fn_id == 1 and contrast is not None:
contrast_factor = torch.tensor(1.0).uniform_(contrast[0], contrast[1]).item()
img = adjust_contrast(img, contrast_factor)
if fn_id == 2 and saturation is not None:
saturation_factor = torch.tensor(1.0).uniform_(saturation[0], saturation[1]).item()
img = adjust_saturation(img, saturation_factor)
if fn_id == 3 and hue is not None:
hue_factor = torch.tensor(1.0).uniform_(hue[0], hue[1]).item()
img = adjust_hue(img, hue_factor)
return img
def get_component_coordinates(self, index, status):
components_bbox = self.components_list[f'{index:08d}']
if status[0]: # hflip
# exchange right and left eye
tmp = components_bbox['left_eye']
components_bbox['left_eye'] = components_bbox['right_eye']
components_bbox['right_eye'] = tmp
# modify the width coordinate
components_bbox['left_eye'][0] = self.out_size - components_bbox['left_eye'][0]
components_bbox['right_eye'][0] = self.out_size - components_bbox['right_eye'][0]
components_bbox['mouth'][0] = self.out_size - components_bbox['mouth'][0]
# get coordinates
locations = []
for part in ['left_eye', 'right_eye', 'mouth']:
mean = components_bbox[part][0:2]
half_len = components_bbox[part][2]
if 'eye' in part:
half_len *= self.eye_enlarge_ratio
loc = np.hstack((mean - half_len + 1, mean + half_len))
loc = torch.from_numpy(loc).float()
locations.append(loc)
return locations
def __getitem__(self, index):
if self.file_client is None:
self.file_client = FileClient(self.io_backend_opt.pop('type'), **self.io_backend_opt)
# load gt image
gt_path = self.paths[index]
img_bytes = self.file_client.get(gt_path)
img_gt = imfrombytes(img_bytes, float32=True)
# random horizontal flip
img_gt, status = augment(img_gt, hflip=self.opt['use_hflip'], rotation=False, return_status=True)
h, w, _ = img_gt.shape
if self.crop_components:
locations = self.get_component_coordinates(index, status)
loc_left_eye, loc_right_eye, loc_mouth = locations
# ------------------------ generate lq image ------------------------ #
# blur
kernel = degradations.random_mixed_kernels(
self.kernel_list,
self.kernel_prob,
self.blur_kernel_size,
self.blur_sigma,
self.blur_sigma, [-math.pi, math.pi],
noise_range=None)
img_lq = cv2.filter2D(img_gt, -1, kernel)
# downsample
scale = np.random.uniform(self.downsample_range[0], self.downsample_range[1])
img_lq = cv2.resize(img_lq, (int(w // scale), int(h // scale)), interpolation=cv2.INTER_LINEAR)
# noise
if self.noise_range is not None:
img_lq = degradations.random_add_gaussian_noise(img_lq, self.noise_range)
# jpeg compression
if self.jpeg_range is not None:
img_lq = degradations.random_add_jpg_compression(img_lq, self.jpeg_range)
# resize to original size
img_lq = cv2.resize(img_lq, (w, h), interpolation=cv2.INTER_LINEAR)
# random color jitter (only for lq)
if self.color_jitter_prob is not None and (np.random.uniform() < self.color_jitter_prob):
img_lq = self.color_jitter(img_lq, self.color_jitter_shift)
# random to gray (only for lq)
if self.gray_prob and np.random.uniform() < self.gray_prob:
img_lq = cv2.cvtColor(img_lq, cv2.COLOR_BGR2GRAY)
img_lq = np.tile(img_lq[:, :, None], [1, 1, 3])
if self.opt.get('gt_gray'):
img_gt = cv2.cvtColor(img_gt, cv2.COLOR_BGR2GRAY)
img_gt = np.tile(img_gt[:, :, None], [1, 1, 3])
# BGR to RGB, HWC to CHW, numpy to tensor
img_gt, img_lq = img2tensor([img_gt, img_lq], bgr2rgb=True, float32=True)
# random color jitter (pytorch version) (only for lq)
if self.color_jitter_pt_prob is not None and (np.random.uniform() < self.color_jitter_pt_prob):
brightness = self.opt.get('brightness', (0.5, 1.5))
contrast = self.opt.get('contrast', (0.5, 1.5))
saturation = self.opt.get('saturation', (0, 1.5))
hue = self.opt.get('hue', (-0.1, 0.1))
img_lq = self.color_jitter_pt(img_lq, brightness, contrast, saturation, hue)
# round and clip
img_lq = torch.clamp((img_lq * 255.0).round(), 0, 255) / 255.
# normalize
normalize(img_gt, self.mean, self.std, inplace=True)
normalize(img_lq, self.mean, self.std, inplace=True)
if self.crop_components:
return_dict = {
'lq': img_lq,
'gt': img_gt,
'gt_path': gt_path,
'loc_left_eye': loc_left_eye,
'loc_right_eye': loc_right_eye,
'loc_mouth': loc_mouth
}
return return_dict
else:
return {'lq': img_lq, 'gt': img_gt, 'gt_path': gt_path}
def __len__(self):
return len(self.paths)
|