yolox_tiny_fast_8xb8-300e_coco.py

_base_ = './yolox_s_fast_8xb8-300e_coco.py'

# ========================modified parameters======================
deepen_factor = 0.33
widen_factor = 0.375
scaling_ratio_range = (0.5, 1.5)

# =======================Unmodified in most cases==================
img_scale = _base_.img_scale
pre_transform = _base_.pre_transform

test_img_scale = (416, 416)
tta_img_scales = [test_img_scale, (320, 320), (640, 640)]

# model settings
model = dict(
    data_preprocessor=dict(batch_augments=[
        dict(
            type='YOLOXBatchSyncRandomResize',
            random_size_range=(320, 640),
            size_divisor=32,
            interval=10)
    ]),
    backbone=dict(deepen_factor=deepen_factor, widen_factor=widen_factor),
    neck=dict(deepen_factor=deepen_factor, widen_factor=widen_factor),
    bbox_head=dict(head_module=dict(widen_factor=widen_factor)))

train_pipeline_stage1 = [
    *pre_transform,
    dict(
        type='Mosaic',
        img_scale=img_scale,
        pad_val=114.0,
        pre_transform=pre_transform),
    dict(
        type='mmdet.RandomAffine',
        scaling_ratio_range=scaling_ratio_range,  # note
        # img_scale is (width, height)
        border=(-img_scale[0] // 2, -img_scale[1] // 2)),
    dict(type='mmdet.YOLOXHSVRandomAug'),
    dict(type='mmdet.RandomFlip', prob=0.5),
    dict(
        type='mmdet.FilterAnnotations',
        min_gt_bbox_wh=(1, 1),
        keep_empty=False),
    dict(
        type='mmdet.PackDetInputs',
        meta_keys=('img_id', 'img_path', 'ori_shape', 'img_shape', 'flip',
                   'flip_direction'))
]

test_pipeline = [
    dict(type='LoadImageFromFile', backend_args=_base_.backend_args),
    dict(type='mmdet.Resize', scale=test_img_scale, keep_ratio=True),  # note
    dict(
        type='mmdet.Pad',
        pad_to_square=True,
        pad_val=dict(img=(114.0, 114.0, 114.0))),
    dict(type='LoadAnnotations', with_bbox=True, _scope_='mmdet'),
    dict(
        type='mmdet.PackDetInputs',
        meta_keys=('img_id', 'img_path', 'ori_shape', 'img_shape',
                   'scale_factor'))
]

train_dataloader = dict(dataset=dict(pipeline=train_pipeline_stage1))
val_dataloader = dict(dataset=dict(pipeline=test_pipeline))
test_dataloader = val_dataloader

# Config for Test Time Augmentation. (TTA)
tta_pipeline = [
    dict(type='LoadImageFromFile', backend_args=_base_.backend_args),
    dict(
        type='TestTimeAug',
        transforms=[
            [
                dict(type='mmdet.Resize', scale=s, keep_ratio=True)
                for s in tta_img_scales
            ],
            [
                # ``RandomFlip`` must be placed before ``Pad``, otherwise
                # bounding box coordinates after flipping cannot be
                # recovered correctly.
                dict(type='mmdet.RandomFlip', prob=1.),
                dict(type='mmdet.RandomFlip', prob=0.)
            ],
            [
                dict(
                    type='mmdet.Pad',
                    pad_to_square=True,
                    pad_val=dict(img=(114.0, 114.0, 114.0))),
            ],
            [
                dict(
                    type='mmdet.PackDetInputs',
                    meta_keys=('img_id', 'img_path', 'ori_shape', 'img_shape',
                               'scale_factor', 'flip', 'flip_direction'))
            ]
        ])
]