An Image Processing Based Money Paper Quality Control System

This paper describes a money paper quality control system based on image processing techniques. The system inspects paper sheet dimensions and verifies whether the money paper has any surface quality or dimensional defect (holes, stains, correct mark positioning,…) while it is moving at a very high speed 20-100 m/min. Due to this high advancing speed of the paper, the high number of inspections to accomplish and the minimum size of the defects to detect (1 mm 2 ), there is no other solution to automate this process but the use of an image processing system based on a high resolution (2048 pixels) lineal camera working at 20 Mhz.