slowonly-lfb-nl_kinetics400-pretrained-r50_8xb12-4x16x1-20e_ava21-rgb.py

_base_ = '../../_base_/default_runtime.py'

# model settings
lfb_prefix_path = 'data/ava/lfb_half'

max_num_sampled_feat = 5
window_size = 60
lfb_channels = 2048
dataset_modes = ('train', 'val')

url = ('https://download.openmmlab.com/mmaction/v1.0/recognition/slowonly/'
       'slowonly_imagenet-pretrained-r50_8xb16-4x16x1-steplr-150e_kinetics400-'
       'rgb/slowonly_imagenet-pretrained-r50_8xb16-4x16x1-steplr-150e_'
       'kinetics400-rgb_20220901-e7b65fad.pth')

model = dict(
    type='FastRCNN',
    _scope_='mmdet',
    init_cfg=dict(type='Pretrained', checkpoint=url),
    backbone=dict(
        type='mmaction.ResNet3dSlowOnly',
        depth=50,
        pretrained=None,
        pretrained2d=False,
        lateral=False,
        num_stages=4,
        conv1_kernel=(1, 7, 7),
        conv1_stride_t=1,
        pool1_stride_t=1,
        spatial_strides=(1, 2, 2, 1)),
    roi_head=dict(
        type='AVARoIHead',
        bbox_roi_extractor=dict(
            type='SingleRoIExtractor3D',
            roi_layer_type='RoIAlign',
            output_size=8,
            with_temporal_pool=True),
        bbox_head=dict(
            type='BBoxHeadAVA',
            background_class=True,
            in_channels=2560,
            num_classes=81,
            multilabel=True,
            dropout_ratio=0.5),
        shared_head=dict(
            type='FBOHead',
            lfb_cfg=dict(
                lfb_prefix_path=lfb_prefix_path,
                max_num_sampled_feat=max_num_sampled_feat,
                window_size=window_size,
                lfb_channels=lfb_channels,
                dataset_modes=dataset_modes,
                device='gpu'),
            fbo_cfg=dict(
                type='non_local',
                st_feat_channels=2048,
                lt_feat_channels=lfb_channels,
                latent_channels=512,
                num_st_feat=1,
                num_lt_feat=window_size * max_num_sampled_feat,
                num_non_local_layers=2,
                st_feat_dropout_ratio=0.2,
                lt_feat_dropout_ratio=0.2,
                pre_activate=True))),
    data_preprocessor=dict(
        type='ActionDataPreprocessor',
        _scope_='mmaction',
        mean=[123.675, 116.28, 103.53],
        std=[58.395, 57.12, 57.375],
        format_shape='NCTHW'),
    train_cfg=dict(
        rcnn=dict(
            assigner=dict(
                type='MaxIoUAssignerAVA',
                pos_iou_thr=0.9,
                neg_iou_thr=0.9,
                min_pos_iou=0.9),
            sampler=dict(
                type='RandomSampler',
                num=32,
                pos_fraction=1,
                neg_pos_ub=-1,
                add_gt_as_proposals=True),
            pos_weight=1.0)),
    test_cfg=dict(rcnn=None))

dataset_type = 'AVADataset'
data_root = 'data/ava/rawframes'
anno_root = 'data/ava/annotations'

ann_file_train = f'{anno_root}/ava_train_v2.1.csv'
ann_file_val = f'{anno_root}/ava_val_v2.1.csv'

exclude_file_train = f'{anno_root}/ava_train_excluded_timestamps_v2.1.csv'
exclude_file_val = f'{anno_root}/ava_val_excluded_timestamps_v2.1.csv'

label_file = f'{anno_root}/ava_action_list_v2.1_for_activitynet_2018.pbtxt'

proposal_file_train = (f'{anno_root}/ava_dense_proposals_train.FAIR.'
                       'recall_93.9.pkl')
proposal_file_val = f'{anno_root}/ava_dense_proposals_val.FAIR.recall_93.9.pkl'

train_pipeline = [
    dict(type='SampleAVAFrames', clip_len=4, frame_interval=16),
    dict(type='RawFrameDecode'),
    dict(type='RandomRescale', scale_range=(256, 320)),
    dict(type='RandomCrop', size=256),
    dict(type='Flip', flip_ratio=0.5),
    dict(type='FormatShape', input_format='NCTHW', collapse=True),
    dict(type='PackActionInputs')
]
# The testing is w/o. any cropping / flipping
val_pipeline = [
    dict(
        type='SampleAVAFrames', clip_len=4, frame_interval=16, test_mode=True),
    dict(type='RawFrameDecode'),
    dict(type='Resize', scale=(-1, 256)),
    dict(type='FormatShape', input_format='NCTHW', collapse=True),
    dict(type='PackActionInputs')
]

train_dataloader = dict(
    batch_size=12,
    num_workers=8,
    persistent_workers=True,
    sampler=dict(type='DefaultSampler', shuffle=True),
    dataset=dict(
        type=dataset_type,
        ann_file=ann_file_train,
        exclude_file=exclude_file_train,
        pipeline=train_pipeline,
        label_file=label_file,
        proposal_file=proposal_file_train,
        data_prefix=dict(img=data_root),
        person_det_score_thr=0.9))

val_dataloader = dict(
    batch_size=1,
    num_workers=8,
    persistent_workers=True,
    sampler=dict(type='DefaultSampler', shuffle=False),
    dataset=dict(
        type=dataset_type,
        ann_file=ann_file_val,
        exclude_file=exclude_file_val,
        pipeline=val_pipeline,
        label_file=label_file,
        proposal_file=proposal_file_val,
        data_prefix=dict(img=data_root),
        person_det_score_thr=0.85,
        test_mode=True))

test_dataloader = val_dataloader

val_evaluator = dict(
    type='AVAMetric',
    ann_file=ann_file_val,
    label_file=label_file,
    exclude_file=exclude_file_val,
    action_thr=0.0)
test_evaluator = val_evaluator

default_hooks = dict(checkpoint=dict(interval=3, max_keep_ckpts=3))

train_cfg = dict(
    type='EpochBasedTrainLoop', max_epochs=20, val_begin=1, val_interval=1)
val_cfg = dict(type='ValLoop')
test_cfg = dict(type='TestLoop')

param_scheduler = [
    dict(
        type='LinearLR',
        start_factor=0.1,
        by_epoch=True,
        begin=0,
        end=5,
        convert_to_iter_based=True),
    dict(
        type='MultiStepLR',
        begin=0,
        end=20,
        by_epoch=True,
        milestones=[10, 15],
        gamma=0.1)
]

optim_wrapper = dict(
    optimizer=dict(type='SGD', lr=0.15, momentum=0.9, weight_decay=1e-05),
    clip_grad=dict(max_norm=20, norm_type=2))