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

Table 3

Different threshold segmentation methods combined with edge detection processing data table.

Attributes	Clear	Better	Medium	Blurry
Laplace + global threshold segmentation	2.44	3.10	3.86	4.83	0.005
Laplace + local threshold segmentation	2.45	3.38	4.49	5.26	0.036
Prewitt + global threshold segmentation	2.22	3.14	3.83	4.72	0.005
Prewitt + local threshold segmentation	2.30	3.34	4.47	4.94	0.032
Robert + global threshold segmentation	2.64	3.13	3.81	4.84	0.005
Robert + local threshold segmentation	2.80	3.35	4.42	5.38	0.031
Sobel + global threshold segmentation	2.50	3.12	4.09	4.88	0.005
Sobel + local threshold segmentation	2.89	3.31	4.36	5.12	0.028