Patent ID: 7277561

Claim:
An iris identification system for confirming an identity of a person, comprising: a mode converter that selects one of registration and identification modes; an image inputter that inputs an iris image; a luminance adjustment module that sequentially selects predetermined luminance levels when the registration mode is selected, and irradiates light of the selected luminance level together with an infrared ray for iris registration; a registration module that captures a plurality of reference iris images input when the light of the selected luminance level is irradiated, preprocesses each captured reference iris image to determine pupil boundary, pupil center, iris size, and class, categorizes each preprocessed reference iris image as at least one of main, auxiliary, negative main and compensation data, encodes the categorized data of each reference iris image, and registers the encoded data of the plurality of reference iris images as registered reference iris images; an identification module that captures an iris image for identification input when the identification mode is selected, preprocesses the captured iris image for identification to determine pupil boundary, pupil center, iris size, and class, categorizes the preprocessed iris image for identification as at least one of main, auxiliary, negative main and compensation data, encodes the categorized data of the iris image for identification, and analyzes similarity between the encoded data of the iris image for identification and the registered reference iris images; a reference iris image storage that stores the data of the registered reference iris images; and a main control unit that controls the image inputter, the luminance adjustment module, the registration module, the identification module and the reference iris image storage according to the mode of the mode converter; wherein each iris image captured by the registration module and the identification module is horizontally divided so as to form a plurality of horizontal bands, the horizontal bands are divided by a perpendicular passing through a center of the pupil such that a plurality of blocks are symmetrically formed, each block is divided into a plurality of rectangular sub-blocks and each rectangular sub-block is divided into a plurality of units; wherein each band has a priority and a weighted value to be considered in the analysis; and wherein each unit in a rectangular sub-block is classified as at least one of auxiliary data, main data, negative main data, and compensation data according to the luminance level of the unit.