Table 3.

Ablation studies of block number on COCO val2017.

Block	AP	${\mathit{AP}}_{50}$	${\mathit{AP}}_{75}$	${\mathit{AP}}_{\mathit{S}}$	${\mathit{AP}}_{\mathit{M}}$	${\mathit{AP}}_{\mathit{L}}$
1	37.0	57.5	39.2	22.1	40.9	47.1
2	37.3	57.9	39.3	21.8	41.1	48.5
4	36.9	57.8	38.9	21.7	41.0	47.2