A Marine Object Detection Algorithm Based on SSD and Feature Enhancement

Figure 3

(a) The image of underwater sea urchins; (b) the image of Sobel operator 2-direction edge detection; (c) the image of Laplace operator single-direction edge detection; (d) the image of Prewitt operator 2-direction edge detection; (e) the image of Prewitt operator 4-direction edge detection; (f) the image of Prewitt operator 8-direction edge detection; and (g) the image of Prewitt operator 16-direction edge detection.

(a)

(b)

(c)

(d)

(e)

(f)

(g)