Patent ID: 7336807
Filing Date: 2008-02-26
Classification: G06K

Abstract:
1. A dishonest registration preventive apparatus in a personal authentication system, which collates an image obtained by photographing a person with a beforehand registered image to authenticate the person on the basis of results of the collation, the apparatus comprising: detection means for detecting positions of the person from a plurality of images acquired by consecutively photographing the person, calculation means for calculating a variation between a position of the person at a current time and a position of the person at a previous time, which are detected by the detection means, feature extraction means for extracting face feature quantities from images of the plurality of images, similarity calculation means for determining a degree of similarity of face feature quantities extracted from an image of the person taken at a current time with face feature quantities extracted from an image of the person taken at a previous time, determination means for comparing the variation calculated by the calculation means with a first predetermined threshold and comparing the degree of similarity to a second predetermined threshold to determine that an image of the plurality of images is a registrable image when the variation does not amount to the first threshold and the degree of similarity is greater than the second threshold and to determine that the image of the plurality of images is an unregistrable image when the variation exceeds the first threshold or the degree of similarity does not exceed the second threshold, and storage means for registering and storing images, which are determined by the determination means to be registrable.