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import os |
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import glob |
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import random |
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import pickle |
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from data import common |
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import imageio |
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import torch.utils.data as data |
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class SRData(data.Dataset): |
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def __init__(self, args, name='', benchmark=True): |
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self.args = args |
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self.name = name |
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self.benchmark = benchmark |
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self.input_large = False |
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self.scale = args.scale |
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self.idx_scale = 0 |
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self._set_filesystem(args.dir_data) |
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if args.ext.find('img') < 0: |
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path_bin = os.path.join(self.apath, 'bin') |
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os.makedirs(path_bin, exist_ok=True) |
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list_hr, list_lr = self._scan() |
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if args.ext.find('img') >= 0 or benchmark: |
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self.images_hr, self.images_lr = list_hr, list_lr |
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elif args.ext.find('sep') >= 0: |
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os.makedirs( |
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self.dir_hr.replace(self.apath, path_bin), |
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exist_ok=True |
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) |
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for s in self.scale: |
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os.makedirs( |
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os.path.join( |
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self.dir_lr.replace(self.apath, path_bin), |
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'X{}'.format(s) |
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), |
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exist_ok=True |
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) |
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self.images_hr, self.images_lr = [], [[] for _ in self.scale] |
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for h in list_hr: |
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b = h.replace(self.apath, path_bin) |
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b = b.replace(self.ext[0], '.pt') |
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self.images_hr.append(b) |
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self._check_and_load(args.ext, h, b, verbose=True) |
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for i, ll in enumerate(list_lr): |
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for l in ll: |
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b = l.replace(self.apath, path_bin) |
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b = b.replace(self.ext[1], '.pt') |
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self.images_lr[i].append(b) |
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self._check_and_load(args.ext, l, b, verbose=True) |
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def _scan(self): |
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names_hr = sorted( |
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glob.glob(os.path.join(self.dir_hr, '*' + self.ext[0])) |
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) |
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names_lr = [[] for _ in self.scale] |
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for f in names_hr: |
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filename, _ = os.path.splitext(os.path.basename(f)) |
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for si, s in enumerate(self.scale): |
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names_lr[si].append(os.path.join( |
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self.dir_lr, 'X{}/{}x{}{}'.format( |
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s, filename, s, self.ext[1] |
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) |
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)) |
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return names_hr, names_lr |
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def _set_filesystem(self, dir_data): |
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self.apath = os.path.join(dir_data, self.name) |
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self.dir_hr = os.path.join(self.apath, 'HR') |
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self.dir_lr = os.path.join(self.apath, 'LR_bicubic') |
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if self.input_large: self.dir_lr += 'L' |
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self.ext = ('.png', '.png') |
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def _check_and_load(self, ext, img, f, verbose=True): |
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if not os.path.isfile(f) or ext.find('reset') >= 0: |
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if verbose: |
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print('Making a binary: {}'.format(f)) |
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with open(f, 'wb') as _f: |
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pickle.dump(imageio.imread(img), _f) |
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def __getitem__(self, idx): |
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lr, hr, filename = self._load_file(idx) |
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pair = self.get_patch(lr, hr) |
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pair = common.set_channel(*pair, n_channels=self.args.n_colors) |
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pair_t = common.np2Tensor(*pair, rgb_range=self.args.rgb_range) |
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return pair_t[0], pair_t[1], filename |
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def __len__(self): |
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return len(self.images_hr) |
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def _get_index(self, idx): |
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return idx |
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def _load_file(self, idx): |
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idx = self._get_index(idx) |
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f_hr = self.images_hr[idx] |
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f_lr = self.images_lr[self.idx_scale][idx] |
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filename, _ = os.path.splitext(os.path.basename(f_hr)) |
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if self.args.ext == 'img' or self.benchmark: |
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hr = imageio.imread(f_hr) |
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lr = imageio.imread(f_lr) |
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elif self.args.ext.find('sep') >= 0: |
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with open(f_hr, 'rb') as _f: |
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hr = pickle.load(_f) |
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with open(f_lr, 'rb') as _f: |
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lr = pickle.load(_f) |
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return lr, hr, filename |
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def get_patch(self, lr, hr): |
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scale = self.scale[self.idx_scale] |
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ih, iw = lr.shape[:2] |
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hr = hr[0:ih * scale, 0:iw * scale] |
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return lr, hr |
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def set_scale(self, idx_scale): |
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if not self.input_large: |
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self.idx_scale = idx_scale |
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else: |
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self.idx_scale = random.randint(0, len(self.scale) - 1) |
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