Automated Visual Inspection of Ship Hull Surfaces Using the Wavelet Transform

Table 3

η in defect segmentation of texture images of Figure 8.

	Entropy based	𝐽^∗	Tsai	𝐽^∗	Han	𝐽^∗
Defect samples
H225	97.09	2	94.51	4	2.14	4
H34	97.41	2	74.52	2	3.43	4
H241	96.04	2	95.17	4	97.41	2
H1	86.50	3	82.63	4	84.69	4
H20	91.40	3	89.22	4	90.08	4
H121	89.36	4	89.91	4	90.23	4
H99	89.30	4	73.76	4	91.46	3
H137	93.94	4	82.87	4	94.26	3
H48	93.06	4	93.97	4	64.23	4
Average on; defect samples	92.68	3.11	86.28	3.78	68.66	3.56
Nondefect samples
H9	98.30	2	74.04	3	99.61	4
H10	98.33	2	80.85	4	48.05	4
H11	98.22	2	89.06	4	48.65	4
Average on; nondefect samples	98.28	2.00	81.32	3.67	65.44	4.00
Total Average	95.48	2.56	83.80	3.72	67.05	3.78