Device and method that compare facial images

A facial image comparing method comprising:

• generating, with a fixed-aspect-ratio normalizer, a first normalized image by performing a normalizing process with fixed aspect ratios on given facial images;
• generating, with a feature extractor, feature images including features to be used for comparing faces, from said first normalized image generated by said fixed-aspect-ratio normalizer,
• generating, with variable-aspect-ratio normalizer, a second normalized image by performing a normalizing process with variable aspect ratios on said feature images generated by said feature extracting extractor;
• calculating, with a first data comparator, a first comparing result as an index as to whether or not faces in two images belong to one person, using said feature images generated by said feature extracting means extractor;
• calculating, with a second data comparator, a second comparing result as an index as to whether or not the faces in the two images belong to one person, using said second normalized image generated by said variable-aspect-ratio normalizer;
• and
• judging, with a judging section, whether or not the faces in the two images belong to one person, based on said first comparing result calculated by said first data comparator and said second comparing result calculated by said second data comparator.

A non-transitory computer readable medium having recorded thereon a computer program for executing a method of comparing a facial image, the method comprising:

• generating a first normalized image by performing a normalizing process with fixed aspect ratios on given facial images;
• generating feature images including features to be used for comparing faces, from said first normalized image;
• generating a second normalized image by performing a normalizing process with variable aspect ratios on said feature images;
• calculating a first comparing result as an index as to whether or not faces in two images belong to one person, using said feature images;
• calculating a second comparing result as an index as to whether or not the faces in the two images belong to one person, using said second normalized image;
• and
• judging whether or not the faces in the two images belong to one person, based on said first comparing result and said second comparing result.