Application of Multi-spectral Technology in Presswork Forgery Prevention

摘要

No matter how similar the genuine printed matter is to counterfeit printed matter, the spectral information will be different owing to their difference in paper and ink composition. Therefore, multi spectral technology can be applied to the research on forgery detection of printed matter. In this paper, the difference of the spectral information is mainly due to the different ink used. Firstly, the feature points of the printed product which has different ink and same graphic messages are collected by using ASD portable spectrometer. Then, the spectral curves of two feature points were analyzed by using the method of continuum removal and spectral angle. The result of analysis proves that these methods that study the printed matter's spectral information is feasible to detection printed matter authenticity. This also opens up a new field for anti fake printing.