total_iters: 1000000
output_dir: output_dir
# tensor range for function tensor2img
min_max:
  (0., 255.)

model:
  name: DRN
  generator:
    name: DRNGenerator
    scale: (2, 4)
    n_blocks: 30
    n_feats: 16
    n_colors: 3
    rgb_range: 255
    negval: 0.2
  pixel_criterion:
    name: L1Loss

dataset:
  train:
    name: SRDataset
    gt_folder: data/DIV2K/DIV2K_train_HR_sub
    lq_folder: data/DIV2K/DIV2K_train_LR_bicubic/X4_sub
    num_workers: 4
    batch_size: 8
    scale: 4
    preprocess:
      - name: LoadImageFromFile
        key: lq
      - name: LoadImageFromFile
        key: gt
      - name: Transforms
        input_keys: [lq, gt]
        output_keys: [lq, lqx2, gt]
        pipeline:
          - name: SRPairedRandomCrop
            gt_patch_size: 384
            scale: 4
            scale_list: True
            keys: [image, image]
          - name: PairedRandomHorizontalFlip
            keys: [image, image, image]
          - name: PairedRandomVerticalFlip
            keys: [image, image, image]
          - name: PairedRandomTransposeHW
            keys: [image, image, image]
          - name: Transpose
            keys: [image, image, image]
          - name: Normalize
            mean: [0., 0., 0.]
            std: [1., 1., 1.]
            keys: [image, image, image]
  test:
    name: SRDataset
    gt_folder: data/DIV2K/val_set14/Set14
    lq_folder: data/DIV2K/val_set14/Set14_bicLRx4
    scale: 4
    preprocess:
      - name: LoadImageFromFile
        key: lq
      - name: LoadImageFromFile
        key: gt
      - name: Transforms
        input_keys: [lq, gt]
        pipeline:
          - name: Transpose
            keys: [image, image]
          - name: Normalize
            mean: [0., 0., 0.]
            std: [1., 1., 1.]
            keys: [image, image]

lr_scheduler:
  name: CosineAnnealingRestartLR
  learning_rate: 0.0001
  periods: [1000000]
  restart_weights: [1]
  eta_min: !!float 1e-7

optimizer:
  optimG:
    name: Adam
    net_names:
      - generator
    weight_decay: 0.0
    beta1: 0.9
    beta2: 0.999
  optimD:
    name: Adam
    net_names:
      - dual_model_0
      - dual_model_1
    weight_decay: 0.0
    beta1: 0.9
    beta2: 0.999

validate:
  interval: 5000
  save_img: false

  metrics:
    psnr: # metric name, can be arbitrary
      name: PSNR
      crop_border: 4
      test_y_channel: True
    ssim:
      name: SSIM
      crop_border: 4
      test_y_channel: True

log_config:
  interval: 10
  visiual_interval: 500

snapshot_config:
  interval: 5000