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data/__init__.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+
+from importlib import import_module
+#from dataloader import MSDataLoader
+from torch.utils.data import dataloader
+from torch.utils.data import ConcatDataset
+
+# This is a simple wrapper function for ConcatDataset
+class MyConcatDataset(ConcatDataset):
+    def __init__(self, datasets):
+        super(MyConcatDataset, self).__init__(datasets)
+        self.train = datasets[0].train
+
+    def set_scale(self, idx_scale):
+        for d in self.datasets:
+            if hasattr(d, 'set_scale'): d.set_scale(idx_scale)
+
+class Data:
+    def __init__(self, args):
+        self.loader_train = None
+        if not args.test_only:
+            datasets = []
+            for d in args.data_train:
+                module_name = d if d.find('DIV2K-Q') < 0 else 'DIV2KJPEG'
+                m = import_module('data.' + module_name.lower())
+                datasets.append(getattr(m, module_name)(args, name=d))
+
+            self.loader_train = dataloader.DataLoader(
+                MyConcatDataset(datasets),
+                batch_size=args.batch_size,
+                shuffle=True,
+                pin_memory=not args.cpu,
+                num_workers=args.n_threads,
+            )
+
+        self.loader_test = []
+        for d in args.data_test:
+            if d in ['Set5', 'Set14', 'B100', 'Urban100', 'Manga109','CBSD68','Rain100L','GOPRO_Large']:
+                m = import_module('data.benchmark')
+                testset = getattr(m, 'Benchmark')(args, train=False, name=d)
+            else:
+                module_name = d if d.find('DIV2K-Q') < 0 else 'DIV2KJPEG'
+                m = import_module('data.' + module_name.lower())
+                testset = getattr(m, module_name)(args, train=False, name=d)
+
+            self.loader_test.append(
+                dataloader.DataLoader(
+                    testset,
+                    batch_size=args.test_batch_size,
+                    shuffle=False,
+                    pin_memory=not args.cpu,
+                    num_workers=args.n_threads,
+                )
+            )

data/benchmark.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+import os
+
+from data import common
+from data import srdata
+
+import numpy as np
+
+import torch
+import torch.utils.data as data
+
+class Benchmark(srdata.SRData):
+    def __init__(self, args, name='', train=True, benchmark=True):
+        super(Benchmark, self).__init__(
+            args, name=name, train=train, benchmark=True
+        )
+
+    def _set_filesystem(self, dir_data):
+        self.apath = os.path.join(dir_data, 'benchmark', self.name)
+        self.dir_hr = os.path.join(self.apath, 'HR')
+        if self.input_large:
+            self.dir_lr = os.path.join(self.apath, 'LR_bicubicL')
+        else:
+            self.dir_lr = os.path.join(self.apath, 'LR_bicubic')
+        self.ext = ('', '.png')
+

data/common.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+import random
+
+import numpy as np
+import skimage.color as sc
+
+import torch
+
+def get_patch(*args, patch_size=96, scale=2, multi=False, input_large=False):
+    ih, iw = args[0].shape[:2]
+
+    tp = patch_size
+    ip = tp // scale
+
+    ix = random.randrange(0, iw - ip + 1)
+    iy = random.randrange(0, ih - ip + 1)
+
+    if not input_large:
+        tx, ty = scale * ix, scale * iy
+    else:
+        tx, ty = ix, iy
+
+    ret = [
+        args[0][iy:iy + ip, ix:ix + ip, :],
+        *[a[ty:ty + tp, tx:tx + tp, :] for a in args[1:]]
+    ]
+
+    return ret
+
+def set_channel(*args, n_channels=3):
+    def _set_channel(img):
+        if img.ndim == 2:
+            img = np.expand_dims(img, axis=2)
+
+        c = img.shape[2]
+        if n_channels == 1 and c == 3:
+            img = np.expand_dims(sc.rgb2ycbcr(img)[:, :, 0], 2)
+        elif n_channels == 3 and c == 1:
+            img = np.concatenate([img] * n_channels, 2)
+
+        return img[:,:,:n_channels]
+
+    return [_set_channel(a) for a in args]
+
+def np2Tensor(*args, rgb_range=255):
+    def _np2Tensor(img):
+        np_transpose = np.ascontiguousarray(img.transpose((2, 0, 1)))
+        tensor = torch.from_numpy(np_transpose).float()
+        tensor.mul_(rgb_range / 255)
+
+        return tensor
+
+    return [_np2Tensor(a) for a in args]
+
+def augment(*args, hflip=True, rot=True):
+    hflip = hflip and random.random() < 0.5
+    vflip = rot and random.random() < 0.5
+    rot90 = rot and random.random() < 0.5
+
+    def _augment(img):
+        if hflip: img = img[:, ::-1, :]
+        if vflip: img = img[::-1, :, :]
+        if rot90: img = img.transpose(1, 0, 2)
+
+        return img
+
+    return [_augment(a) for a in args]
+

data/demo.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+import os
+
+from data import common
+
+import numpy as np
+import imageio
+
+import torch
+import torch.utils.data as data
+
+class Demo(data.Dataset):
+    def __init__(self, args, name='Demo', train=False, benchmark=False):
+        self.args = args
+        self.name = name
+        self.scale = args.scale
+        self.idx_scale = 0
+        self.train = False
+        self.benchmark = benchmark
+
+        self.filelist = []
+        for f in os.listdir(args.dir_demo):
+            if f.find('.png') >= 0 or f.find('.jp') >= 0:
+                self.filelist.append(os.path.join(args.dir_demo, f))
+        self.filelist.sort()
+
+    def __getitem__(self, idx):
+        filename = os.path.splitext(os.path.basename(self.filelist[idx]))[0]
+        lr = imageio.imread(self.filelist[idx])
+        lr, = common.set_channel(lr, n_channels=self.args.n_colors)
+        lr_t, = common.np2Tensor(lr, rgb_range=self.args.rgb_range)
+
+        return lr_t, -1, filename
+
+    def __len__(self):
+        return len(self.filelist)
+
+    def set_scale(self, idx_scale):
+        self.idx_scale = idx_scale
+

data/div2k.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+import os
+from data import srdata
+
+class DIV2K(srdata.SRData):
+    def __init__(self, args, name='DIV2K', train=True, benchmark=False):
+        data_range = [r.split('-') for r in args.data_range.split('/')]
+        if train:
+            data_range = data_range[0]
+        else:
+            if args.test_only and len(data_range) == 1:
+                data_range = data_range[0]
+            else:
+                data_range = data_range[1]
+
+        self.begin, self.end = list(map(lambda x: int(x), data_range))
+        super(DIV2K, self).__init__(
+            args, name=name, train=train, benchmark=benchmark
+        )
+
+    def _scan(self):
+        names_hr, names_lr = super(DIV2K, self)._scan()
+        names_hr = names_hr[self.begin - 1:self.end]
+        names_lr = [n[self.begin - 1:self.end] for n in names_lr]
+
+        return names_hr, names_lr
+
+    def _set_filesystem(self, dir_data):
+        super(DIV2K, self)._set_filesystem(dir_data)
+        self.dir_hr = os.path.join(self.apath, 'DIV2K_train_HR')
+        self.dir_lr = os.path.join(self.apath, 'DIV2K_train_LR_bicubic')
+        #if self.input_large: self.dir_lr += 'L'
+

data/div2kjpeg.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+import os
+from data import srdata
+from data import div2k
+
+class DIV2KJPEG(div2k.DIV2K):
+    def __init__(self, args, name='', train=True, benchmark=False):
+        self.q_factor = int(name.replace('DIV2K-Q', ''))
+        super(DIV2KJPEG, self).__init__(
+            args, name=name, train=train, benchmark=benchmark
+        )
+
+    def _set_filesystem(self, dir_data):
+        self.apath = os.path.join(dir_data, 'DIV2K')
+        self.dir_hr = os.path.join(self.apath, 'DIV2K_train_HR')
+        self.dir_lr = os.path.join(
+            self.apath, 'DIV2K_Q{}'.format(self.q_factor)
+        )
+        if self.input_large: self.dir_lr += 'L'
+        self.ext = ('.png', '.jpg')
+

data/sr291.py

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+# 2021.05.07-Changed for IPT
+#            Huawei Technologies Co., Ltd. <[email protected]>
+
+from data import srdata
+
+class SR291(srdata.SRData):
+    def __init__(self, args, name='SR291', train=True, benchmark=False):
+        super(SR291, self).__init__(args, name=name)
+