Patent ID: 7110600

Claim:
An apparatus for discriminating a document with a discriminating information, said apparatus comprising: image reading unit reading image data from said document prepared in an optional format; image data cutting out unit cutting out image data corresponding to a designated specified portion of said document from said image data read by said image reading unit; color constituent extracting unit analyzing color constituents of said image data cut out by said cutting out unit and setting a color separation parameter determining a density distribution scope in color space for a specific color constituent of said image data cut out, and storing said color separation parameter together with the discriminating information in a document discriminating dictionary unit; color constituent separating unit producing said discriminating information based on said color separation parameter set by said color constituent extracting unit; and a document determination unit comparing for determination said discriminating information produced from image data obtained by reading a document to be discriminated based on said color separation parameter with said discriminating information stored in said document discriminating dictionary unit.