Train_HR: http://data.vision.ee.ethz.ch/cvl/DIV2K/DIV2K_train_HR.zip
Valid_HR: http://data.vision.ee.ethz.ch/cvl/DIV2K/DIV2K_valid_HR.zip
Train_bicubic_x4: http://data.vision.ee.ethz.ch/cvl/DIV2K/DIV2K_train_LR_bicubic_X4.zip
Valid_bicubic_x4: http://data.vision.ee.ethz.ch/cvl/DIV2K/DIV2K_valid_LR_bicubic_X4.zip
datasets
└── DIV2K
├── DIV2K_train_HR
├── DIV2K_train_LR_bicubic
│ └── X4
├── DIV2K_valid_HR
└── DIV2K_valid_LR_bicubic
└── X4