BANKNOTE DETECTION METHOD AND DEVICE

摘要

A banknote detection method, involves providing an image obtaining unit, a light source and a banknote conveying passage in a banknote identification device wherein the image obtaining unit and the light source are respectively disposed on two sides of the banknote conveying passage of the banknote identification device. The method comprises, during the process of a banknote to be detected passing through the banknote conveying passage, the image obtaining unit collecting a full amplitude image of the banknote via transmission light transmitted through the banknote by the light source and processing the image; extracting anti-counterfeiting feature information from the processed full amplitude image; judging the banknote as genuine or counterfeit based on the processed image and/or anti-counterfeiting feature information. A corresponding device is also provided in the invention. The banknote detection solution provided by the invention can avoid the limitation of algorithm and processing of reflective imaging, be easily implemented with a low cost, and realize fast and accurate detection, so as to accurately detect counterfeit banknotes. The solution has a remarkable effect for authentication of altered currency. The invention can also provide accurate detection on complementary opposite printing type features of offset printing.