Patent ID: 6928190

Claim:
An image discrimination apparatus for discriminating a prescribed pattern contained in an original image, comprising: extraction means for extracting, from an input original image, a plurality of marks having a prescribed color density and disposed in a predetermined positional relationship; calculation means for calculating the relative positional relationship of the plurality of marks extracted by said extraction means; and discrimination means for discriminating whether or not the prescribed image pattern is present in the original image based upon the relative positional relationship calculated by said calculation means, wherein said calculation means calculates distances between the plurality of marks, which have been extracted by said extraction means, as the relative positional relationship, and said discrimination means includes storage means for storing distances between the plurality of marks, which constitute the prescribed image pattern, as a template, and determines whether or not the prescribed image pattern is present in accordance with a result of a comparison between the distances between the plurality of marks calculated by said calculation means and the distances between the marks stored in said storage means as the template.