Patent ID: 7227973
Filing Date: 2007-06-05
Classification: G06K

Abstract:
1. An image comparison device comprising: a registration means for obtaining and registering 3-D data of all or part of one or more registered objects; and a comparison means for obtaining 2-D data of a target object and comparing the obtained 2-D data with the data registered in the registration means for conducting judgment concerning the similarity/sameness between the target object and each of the one or more registered objects, wherein the comparison means includes: a photographing means for photographing the target object and thereby obtaining an input image; a position/pose determination means for determining the position/pose of the target object in the input image obtained by the photographing means; an illumination correction means for generating an image of each registered object in the same position/pose as the target object in the input image and under an illumination condition most similar to that of the input image as a reference image by use of the position/pose determined by the position/pose determination means and the data registered in the registration means; an image comparison means for comparing each reference image generated by the illumination correction means with the input image obtained by the photographing means and thereby calculating an evaluation value concerning the similarity between the two images; and a judgment means for judging whether or not each of the registered objects registered in the registration means is the same as or similar to the target object photographed by the photographing means based on the evaluation value calculated by the image comparison means.