The application of line-labeling algorithm to on-line defect detection system for printed-matter

The Application of Line-labeling algorithm to on-line defect detection system for printed-matter was studied in this paper and it was compared with Pixel Labeled Algorithm. The algorithm is based on the line between rows. Connected regions of defect were marked and their parameters (position, area, etc) were obtained rapidly by scan the full image only once, while the full image has to be scanned twice and an equivalent mark table has to be produced in Pixel Labeled Algorithm. Practical application shows that Line-labeling algorithm is more suitable for on-line defect detection system.