Patent ID: 6125986
Filing Date: 2000-10-03
Classification: G07D

Abstract:
A sheet discriminating apparatus comprising a light source for emitting light toward a bill, light receiving means for receiving light emitted from the light source and reflected by a non-printed surface portion of the bill and generating spectral data, memory means for storing reference data, and discriminating means for discriminating genuineness of the bill based on the spectral data generated by the light receiving means and the reference data stored in the memory means, said light receiving means storing in advance spectral reference data, generating detected data by dividing intensity data of the reference spectral data of the bill at each wavelength by intensity data of the reference spectral data at the corresponding wavelength and outputting the detected data to the discriminating means, and the discriminating means further comprising chromaticity coordinate conversion means for converting the detected data into chromaticity coordinates so as to discriminate the genuineness of the bill based on the detected data converted by the chromaticity coordinate conversion means.