| 主权项 |
1. A method of verifying the authenticity of an eye provided for identification purposes in an iris recognition identification system, the method comprising:
generating an activation sequence specifying a random order and a random duration in which at least one of a plurality of illumination sources is to be activated; illuminating the eye using infra-red or near infra-red pulses in accordance with the activation sequence, each pulse being emitted from at least one of the plurality of illumination sources to generate a corresponding sequence of specular reflections in a pupil and/or iris region of the eye, each illumination source being located at a different position with respect to the eye, and each specular reflection forming as a result of light emitted from one of the plurality of illumination sources being reflected from the eye; capturing, from a location that is fixed relative to the plurality of illumination sources, a sequence of images of the eye, the sequence of images including the corresponding sequence of specular reflections; determining a position and a duration of each specular reflection formed in the pupil and/or iris region, from each captured image in the sequence of images; calculating, for each captured image in the sequence of images, an associated expected position and an associated expected duration of each specular reflection for an authentic eye; and verifying the authenticity of the eye by comparing the determined position of each specular reflection with the associated expected position, and comparing the determined duration of each specular reflection with the associated expected duration, wherein the verifying step is carried out for each captured image in the sequence of images. |
