<P>PROBLEM TO BE SOLVED: To improve authentication accuracy by combining evaluations by comparison between an input image and a registered image in a database and the other evaluation methods. <P>SOLUTION: A face authentication device 1 for collating an input image A1 for which a face of a person is photographed with a registered image database 21 in which registered images R including face feature data are registered includes: an absolute evaluation part 331 for calculating an absolute evaluation score between face feature data A11 of the input image A1 and the face feature data included in the registered images R; a relative evaluation part 334 for calculating a relative evaluation score indicating how much one person registered in the registered image database 21 is approximate to the person of the input image A1 relative to the other persons; an evaluation integration part for calculating an integrated score by weighting and integrating the absolute evaluation score and the relative evaluation score; and an authentication result output part 34 for collating the input image A1 on the basis of the integrated score. <P>COPYRIGHT: (C)2013,JPO&INPIT
