SPOOFING DETECTION SYSTEM, SPOOFING DETECTION METHOD AND SPOOFING DETECTION PROGRAM

摘要

A spoofing detection system includes an imaging unit (2) for imaging an object (12) to be checked from a first angle, obtaining a first image, imaging the object from a second angle different from the first one, and obtaining a second image, a feature point coordinate calculating unit (101) for detecting a first feature point from the first image, obtaining the coordinates representing the position of the detected first feature point, detecting the second feature point from the second image, and obtaining the coordinates representing the position of the detected second feature point, a feature point associating unit (102) for associating the first feature point with the second feature point, a feature transforming unit (104) for obtaining the transformed coordinates by applying planar projective transformation to the coordinates of the second feature point from the second image to the first image, and a similarity determining unit (105) for determining that spoofing is being tried if the difference between the transformed coordinates and the coordinates of the first feature point is below a certain value.