Patent ID: 7856137

Claim:
An image verifying apparatus that verifies an image by comparing features of images between an input image of an object to be verified and a template image registered in advance, the image verifying apparatus comprising: a correlation-value-image separating unit that generates, with a computer, a correlation value image from the input image and the template image, and separates the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value of the correlation value image is equal to or larger than a threshold; a template-image separating unit that separates the template image into a positive template image and a negative template image depending on whether a pixel value of the template image is equal to or larger than a threshold; a positive-negative-separated-correlation-image generating unit that generates a plurality of positive-negative-separated correlation-images having, as a pixel value of the plurality of the positive-negative-separated correlation-images, a value obtained by calculating a product of a pixel value of one of the positive correlation value image and the negative correlation value image and a pixel value of one of the positive template image and the negative template image; and a verification determining unit that performs a verification determination based on the positive-negative-separated correlation images.