Patent ID: 8718335
Filing Date: 2014-05-06
Classification: A61B,G06F,G06K,G07C

Abstract:
1. Apparatus for authenticating a subject, comprising: an image projection device to generate and project an image of a pattern, made up of plural discrete points, onto at least a part of the cornea of an eye of the subject; an image capture device to capture an image of the pattern of plural discrete points, after reflection in at least a part of the cornea of an eye of the subject; and, a computer processor to extract a first data set defining the locations of the discrete points in the captured image, and to compare the first data set against a second data set defining locations of corresponding points in a reference set according to: where M is a similarity score between the first data set and the second data set, N is the set of valid locations for both the first dataset and the second dataset and w are weights used to allow points further from a center of the pattern to be given more weight in the similarity score M than points closer to the center, and the parameter p is an integer greater than zero.