PAPER CURRENCY NUMBER RECOGNITION APPARATUS AND RECOGNITION METHOD

摘要

A paper currency number recognition apparatus and method. The apparatus comprises : a contact type sensor (10) for acquiring paper currency image data; a white light LED transmission light source board (20); an image acquisition processing board (40) 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 (20) and driving the contact type sensor (10) to acquire an image and the DSP being used for processing and recognizing the paper currency image data; and two pairs of position sensors (30) for detecting whether there is a paper currency entering the paper currency number recognition apparatus wherein the white light LED transmission light source board (20) 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 (10) to acquire the paper currency image data. The apparatus can acquire two white light transmission images with different b rightness 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.