1. An image recognition apparatus comprising: an extractor that extracts a feature quantity for each local area from an input image; a converter that converts the feature quantity for each local area extracted by the extractor into a feature quantity representing respective degrees of similarities with a plurality of representative patterns; a verifier that verifies the feature quantity for each local area converted by the convertor against a feature quantity of a registered image, the feature quantity of the registered image representing respective degrees of similarities with the plurality of representative patterns; and an identifier that identifies whether the input image is identical to the registered image by integrating verification results for a plurality of local areas acquired by the verification unit.