Table 4.

Detection precision of different models for various underwater targets with IoU thresholds of 0.5 and 0.7.

	IoU = 0.5				IoU = 0.7						mAP@ [0.5,0.95]
	Holothurian	Echinus	Scallop	Starfish	mAP	Holothurian	Echinus	Scallop	Starfish	mAP
SSD	0.487	0.682	0.421	0.676	0.567	0.352	0.442	0.253	0.462	0.377	0.309
Yolo_v3	0.577	0.691	0.442	0.599	0.577	0.368	0.442	0.297	0.392	0.375	0.305
Faster RCNN	0.587	0.767	0.489	0.688	0.633	0.433	0.543	0.358	0.526	0.465	0.358
Cascade RCNN	0.589	0.767	0.495	0.685	0.634	0.437	0.549	0.366	0.556	0.477	0.373
Proposed framework	0.650	0.777	0.595	0.755	0.694	0.514	0.610	0.446	0.580	0.538	0.408