A Marine Object Detection Algorithm Based on SSD and Feature Enhancement

Table 4

Sea urchin confidence in the ISSD algorithm for multidirectional detection in Figure 10(a).

Scene 2 sea urchin confidence	Sea urchin 1	Sea urchin 2	Sea urchin 3	Sea urchin 4	Sea urchin 5	Sea urchin 6
Laplace operator unidirectional	0.903	0.828	0.594	0.917	0.791	0.923
Prewitt operator 2 directions	0.969	0.935	None	0.932	0.930	0.829
Prewitt operator 4 directions	0.976	0.952	None	0.949	0.901	0.887
Prewitt operator 8 directions	0.974	0.968	0.680	0.959	0.913	0.886
Prewitt operator 16 directions	0.982	0.953	0.741	0.966	0.917	0.889
Sobel operator 2 directions	0.981	0.943	0.644	0.865	0.927	0.838