configs/pointnet2/pointnet2_msg_2xb16-cosine-250e_scannet-seg.py

_base_ = [
    '../_base_/datasets/scannet-seg.py', '../_base_/models/pointnet2_msg.py',
    '../_base_/schedules/seg-cosine-200e.py', '../_base_/default_runtime.py'
]

# model settings
model = dict(
    decode_head=dict(
        num_classes=20,
        ignore_index=20,
        # `class_weight` is generated in data pre-processing, saved in
        # `data/scannet/seg_info/train_label_weight.npy`
        # you can copy paste the values here, or input the file path as
        # `class_weight=data/scannet/seg_info/train_label_weight.npy`
        loss_decode=dict(class_weight=[
            2.389689, 2.7215734, 4.5944676, 4.8543367, 4.096086, 4.907941,
            4.690836, 4.512031, 4.623311, 4.9242644, 5.358117, 5.360071,
            5.019636, 4.967126, 5.3502126, 5.4023647, 5.4027233, 5.4169416,
            5.3954206, 4.6971426
        ])),
    test_cfg=dict(
        num_points=8192,
        block_size=1.5,
        sample_rate=0.5,
        use_normalized_coord=False,
        batch_size=24))

# data settings
train_dataloader = dict(batch_size=16)

# runtime settings
default_hooks = dict(checkpoint=dict(type='CheckpointHook', interval=5))

# PointNet2-MSG needs longer training time than PointNet2-SSG
train_cfg = dict(by_epoch=True, max_epochs=250, val_interval=5)