Patent ID: 7991197

Claim:
A sheet identification apparatus comprising: a dictionary configured to store a selection area and an image corresponding to the selection area, the selection area being used for identification and selected from among a plurality of areas of an image which is used as a reference when a sheet is to, be identified; a feeding module configured to feed a sheet to be identified; an image input module configured to input an image of the sheet fed by the feeding module; a feed state detecting module configured to detect a sliding amount, a skew amount, and a coordinate of a center pixel of the sheet that is being fed, based on coordinates of corners of the sheet of the image input by the image input module; an area dividing module configured to divide the image input by the input module into predetermined areas; a convert module configured to convert only a coordinate of a center pixel of the selection area stored in the dictionary, based on the sliding amount, the skew amount, and the coordinate of a center pixel detected by the feed state detecting module and without changing inclination of the selection area; an identification result acquiring module configured to detect a degree of similarity between the image of the selection area converted by the convert module and an image of an area corresponding to the selection area, and to obtain an identification result for each image; and an identification result determining module configured to determine an overall identification result, based on the identification result acquired by the identification result acquiring module for each image.