Bilderkennungsvorrichtung

A parameter input section inputs, as parameters, the luminance difference between a to-be-recognized object P and its background, conveyance conditions, etc. An endpoint detecting section uses the parameters to detect a plurality of border points between the object P and the background, without being influenced by external noise or a stain on the object P. A length detecting section detects vertical and horizontal lengths of the object P, and an entire-object position determining section determines the position of the entire object P using the lengths detected by the section. A recognizing section compares an image input by an image input section, with reference image data stored in a reference image data memory, thereby recognizing the object P.