Reducing the Collision Damage Done to the Tips of Steel Needles during Integrated Piercing by Using Shape Optimization with Feature Selection

Table 12

Statistics of image processing results.

Group no.	Picture no.	L2 (mm)	dned (mm)	Safety holes	Dangerous holes	Total number of holes	Recognition rate (%)	Safety rate (%)	Dangerous (%)
1	1-1	7.95	1.159	2092	123	2219	99.82	94.28	5.54
1	1-2	7.95	1.159	2092	124	2219	99.86	94.28	5.59
2	2-1	10	1.159	2054	159	2219	99.73	92.56	7.17
2	2-2	10	1.159	2062	151	2219	99.73	92.92	6.80
3	3-1	7.95	1.0	1643	567	2219	99.59	74.04	25.55
3	3-2	7.95	1.0	1651	560	2219	99.64	74.40	25.24
4	4-1	10	1.0	1284	914	2219	99.05	57.86	41.19
4	4-2	10	1.0	1240	957	2219	99.01	55.88	43.13