resnext50-32x4d_b32x8_100e_jpg.py

_base_ = '../common/dataset/imagenet_classification.py'

num_classes = 1000
# model settings
model = dict(
    type='Classification',
    backbone=dict(
        type='ResNeXt',
        depth=50,
        groups=32,
        base_width=4,
        out_indices=[4],  # 0: conv-1, x: stage-x
        norm_cfg=dict(type='BN')),
    head=dict(
        type='ClsHead',
        with_avg_pool=True,
        in_channels=2048,
        loss_config=dict(
            type='CrossEntropyLossWithLabelSmooth',
            label_smooth=0,
        ),
        num_classes=num_classes))

# optimizer
optimizer = dict(type='SGD', lr=0.1, momentum=0.9, weight_decay=0.0001)

# learning policy
lr_config = dict(policy='step', step=[30, 60, 90])
checkpoint_config = dict(interval=10)

# runtime settings
total_epochs = 100