mask-rcnn_r50_fpn_seesaw-loss_random-ms-2x_lvis-v1.py

_base_ = [
    '../_base_/models/mask-rcnn_r50_fpn.py',
    '../_base_/datasets/coco_instance.py',
    '../_base_/schedules/schedule_2x.py', '../_base_/default_runtime.py'
]
model = dict(
    roi_head=dict(
        bbox_head=dict(
            num_classes=1203,
            cls_predictor_cfg=dict(type='NormedLinear', tempearture=20),
            loss_cls=dict(
                type='SeesawLoss',
                p=0.8,
                q=2.0,
                num_classes=1203,
                loss_weight=1.0)),
        mask_head=dict(num_classes=1203)),
    test_cfg=dict(
        rcnn=dict(
            score_thr=0.0001,
            # LVIS allows up to 300
            max_per_img=300)))

# dataset settings
train_pipeline = [
    dict(type='LoadImageFromFile', backend_args={{_base_.backend_args}}),
    dict(type='LoadAnnotations', with_bbox=True, with_mask=True),
    dict(
        type='RandomChoiceResize',
        scales=[(1333, 640), (1333, 672), (1333, 704), (1333, 736),
                (1333, 768), (1333, 800)],
        keep_ratio=True),
    dict(type='RandomFlip', prob=0.5),
    dict(type='PackDetInputs')
]
dataset_type = 'LVISV1Dataset'
data_root = 'data/lvis_v1/'
train_dataloader = dict(
    dataset=dict(
        type=dataset_type,
        data_root=data_root,
        ann_file='annotations/lvis_v1_train.json',
        data_prefix=dict(img=''),
        pipeline=train_pipeline))
val_dataloader = dict(
    dataset=dict(
        type=dataset_type,
        data_root=data_root,
        ann_file='annotations/lvis_v1_val.json',
        data_prefix=dict(img='')))
test_dataloader = val_dataloader

val_evaluator = dict(
    type='LVISMetric',
    ann_file=data_root + 'annotations/lvis_v1_val.json',
    metric=['bbox', 'segm'])
test_evaluator = val_evaluator

train_cfg = dict(val_interval=24)