Research And Application Of Key Technical Of Antifalsification Paper Security Thread Inspection Based On Machine Vision

Now in China, Most inspection on antifalsifiaction paper security thread is mademanually. The inspection is slow and easy to make mistake. In this paper, areal-time inspect method which is based on the machine vision technical has beenput forward, this method is low-cost and high-performance. We have researchedon the frame of the inspection system, how to get the high-quality image andthe real-time image processing arithmetic. In china, the problem of real-timeinspection of antifalsifiaction paper security thread has been successfullysolved for the first time. The system has the features like real-time online,high-speed, no contact, automatic inspetion.This paper has discussed the next points:(1) The research on the frame of a type of machine vision system which basedon line-scan camera.(2) The lighting method which is fit to the holographic windowed security threadthat used in antifalsifiaction paper and the way to get high-quality image.(3) Image processing arithmetic such as thresholding, model match, Blobanalysis and edge detection.In this paper, author proved the feasibility of using the machine vision systembased on line-scan camera to inspect the holographic windowed security threadthat used in antifalsifiaction paper.