An Improved Object Detection Method for Underwater Sonar Image Based on PP-YOLOv2

Table 2

Ablation experiments for the proposed method on forward sonar data set.

	Method	(%)	Info time (ms)	FPS (f/s)
A	PP-YOLOv2	49.36	31.1	32.15
B	A + mosaic+resize anchor	50.54	31.1	32.15
C	B + BotNet-dcn	51.43	35.6	28.14
D	C + decoupled head	52.63	38.5	26.18
E	D + image size 768	53.14	41.2	24.27
F	E + BotNet-dcn 101	53.51	50.5	19.82