Paper currency number recognition apparatus and recognition method

Abstract

A paper currency number recognition apparatus and method. The apparatus comprises: a contact-type sensor () for acquiring paper currency image data; a white-light LED transmission light source board (); an image acquisition processing board () which is integrated with an FPGA and a DSP, the FPGA being used for controlling ON/OFF of the white-light LED transmission light source board () and driving the contact-type sensor () to acquire an image, and the DSP being used for processing and recognizing the paper currency image data; and two pairs of position sensors () for detecting whether there is a paper currency entering the paper currency number recognition apparatus, wherein the white-light LED transmission light source board () has two light source modes which are strong and weak, and the two light source modes alternately provide a transmission light source for the contact-type sensor () to acquire the paper currency image data. The apparatus can acquire two white-light transmission images with different brightness of one and the same paper currency each time; therefore, the numbers of both new and old paper currencies can be effectively recognized, and the accuracy rate of paper currency number recognition is improved.