Patent ID: 6561643
Filing Date: 2003-05-13
Classification: B41J

Abstract:
A method of classifying incoming media entering a printing mechanism, the method comprising:optically scanning a portion of the incoming media to generate diffuse reflectance data and specular reflectance data; determining spatial frequencies of the diffuse reflectance data and the specular reflectance data; calculating an average of the diffuse reflectance data; calculating an average of the specular reflectance data; analyzing the diffuse reflectance data and the specular reflectance data and the spatial frequencies thereof through comparison with known values for different types of media to classify the incoming media as one of said different types, including generating a ratio of the average of the diffuse reflectance data to the average of the specular reflectance data and comparing said ratio with a known value to determine whether the incoming media is of a first category of media or a second category of media and not of a third category of media or a fourth category of media.