A Marine Object Detection Algorithm Based on SSD and Feature Enhancement

Table 3

Sea urchin confidence in the ISSD algorithm for multidirectional detection in Figure 9(a).

Scene 1 sea urchin confidence	Sea urchin 1	Sea urchin 2	Sea urchin 3	Sea urchin 4	Sea urchin 5	Sea urchin 6
Laplace operator unidirectional	0.932	0.753	0.886	0.879	0.552	0.462
Prewitt operator 2 directions	0.843	0.648	0.491	0.294	0.247	None
Prewitt operator 4 directions	0.905	0.647	0.802	0.949	0.432	0.333
Prewitt operator 8 directions	0.849	0.783	0.871	0.888	0.669	0.324
Prewitt operator 16 directions	0.928	0.733	0.878	0.939	0.666	0.479
Sobel operator 2 directions	0.931	0.777	0.912	0.889	0.622	0.230