[Retracted] Intelligent Edge Computing Detection Vehicle and Detection Method Based on Tunnel Lining Concrete

Table 4

Different edge detection operators perform global threshold segmentation data table.

Attributes	Clear	Better	Medium	Blurry
Laplace + threshold segmentation	2.83	2.91	3.92	5.06	0.010
Prewitt + threshold segmentation	3.07	3.89	5.34	4.8	0.010
Robert + threshold segmentation	3.88	5.37	5.32	6.94	0.010
Sobel + threshold segmentation	5.11	5.07	7.36	8.43	0.010
Canny + threshold segmentation	4.91	5.4	7.27	8.6	0.010
Shen + threshold segmentation	5.2	4.99	7.14	8.44	0.010
Deriche + threshold segmentation	5.19	5.04	7.02	8.18	0.010
Lanser + threshold segmentation	4.85	7.31	8.48	9.7	0.010