cyclegan_lsgan-resnet-in_1xb1-250kiters_summer2winter.py

_base_ = [
    '../_base_/models/base_cyclegan.py',
    '../_base_/datasets/unpaired_imgs_256x256.py',
    '../_base_/gen_default_runtime.py'
]
train_cfg = dict(max_iters=250000)

domain_a = 'summer'
domain_b = 'winter'
model = dict(
    loss_config=dict(cycle_loss_weight=10., id_loss_weight=0.5),
    default_domain=domain_b,
    reachable_domains=[domain_a, domain_b],
    related_domains=[domain_a, domain_b],
    data_preprocessor=dict(data_keys=[f'img_{domain_a}', f'img_{domain_b}']))

dataroot = './data/cyclegan/summer2winter_yosemite'
train_pipeline = _base_.train_dataloader.dataset.pipeline
val_pipeline = _base_.val_dataloader.dataset.pipeline
test_pipeline = _base_.test_dataloader.dataset.pipeline

key_mapping = dict(
    type='KeyMapper',
    mapping={
        f'img_{domain_a}': 'img_A',
        f'img_{domain_b}': 'img_B'
    },
    remapping={
        f'img_{domain_a}': f'img_{domain_a}',
        f'img_{domain_b}': f'img_{domain_b}'
    })
pack_input = dict(
    type='PackInputs',
    keys=[f'img_{domain_a}', f'img_{domain_b}'],
    data_keys=[f'img_{domain_a}', f'img_{domain_b}'])

train_pipeline += [key_mapping, pack_input]
val_pipeline += [key_mapping, pack_input]
test_pipeline += [key_mapping, pack_input]

train_dataloader = dict(dataset=dict(data_root=dataroot))
val_dataloader = dict(dataset=dict(data_root=dataroot, test_mode=True))
test_dataloader = val_dataloader

optim_wrapper = dict(
    generators=dict(
        optimizer=dict(type='Adam', lr=0.0002, betas=(0.5, 0.999))),
    discriminators=dict(
        optimizer=dict(type='Adam', lr=0.0002, betas=(0.5, 0.999))))

# learning policy
param_scheduler = dict(
    type='LinearLrInterval',
    interval=1250,
    by_epoch=False,
    start_factor=0.0002,
    end_factor=0,
    begin=125000,
    end=250000)

custom_hooks = [
    dict(
        type='VisualizationHook',
        interval=5000,
        fixed_input=True,
        vis_kwargs_list=[
            dict(type='Translation', name='trans'),
            dict(type='TranslationVal', name='trans_val')
        ])
]

num_images_a = 309
num_images_b = 238
metrics = [
    dict(
        type='TransIS',
        prefix=f'IS-{domain_a}-to-{domain_b}',
        fake_nums=num_images_b,
        fake_key=f'fake_{domain_b}',
        use_pillow_resize=False,
        resize_method='bilinear',
        inception_style='PyTorch'),
    dict(
        type='TransIS',
        prefix=f'IS-{domain_b}-to-{domain_a}',
        fake_nums=num_images_a,
        fake_key=f'fake_{domain_a}',
        use_pillow_resize=False,
        resize_method='bilinear',
        inception_style='PyTorch'),
    dict(
        type='TransFID',
        prefix=f'FID-{domain_a}-to-{domain_b}',
        fake_nums=num_images_b,
        inception_style='PyTorch',
        real_key=f'img_{domain_b}',
        fake_key=f'fake_{domain_b}'),
    dict(
        type='TransFID',
        prefix=f'FID-{domain_b}-to-{domain_a}',
        fake_nums=num_images_a,
        inception_style='PyTorch',
        real_key=f'img_{domain_a}',
        fake_key=f'fake_{domain_a}')
]

val_evaluator = dict(metrics=metrics)
test_evaluator = dict(metrics=metrics)