Industrial Internet of Things for Mobile Phone Shell Intelligent Detection in Smart Cities

Table 4

Time consumption of each part.

Image preprocessing		ROI extraction					Feature extraction	Defect detection
Filtering	Graying	Affine	Edge detection	Binarization	Open operation	ROI clipping	Extracting GLH	GLH comparison
0.14 s	0.39 s	0.37 s	1.71 s	0.02 s	0.26 s	0.03 s	0.22 s	1.42 s