Patent ID: 7379567
Filing Date: 2008-05-27
Classification: G06K

Abstract:
1. An iris code generation method comprising the steps of: a step of capturing a plurality of iris images that include a same eye; a step of transforming a coordinate system of each of the iris images from a rectangular coordinate system to a polar coordinate system; a step of performing rotational compensation on each of the coordinate transformed iris images; a step of adding together each of the rotationally compensated iris images, while attaching a weight to each pixel value in each coordinate of the polar coordinate system, to accumulate them as a single iris image; and a step of generating an iris code from the single iris image, wherein in the weighted addition in the accumulation step, the weight is set smaller as a distance between a coordinate value in the original rectangular coordinate system corresponding to a coordinate of the polar coordinate system and a coordinate value of a pixel in the vicinity thereof is larger.