Method and device for locating a human iris in an image

摘要

The method involves locating a pupil (P) in an image of eye. Positions of jumps in intensity of pixels are detected, where the pixels are located on a pupil centre (Cp) and a position (x) on a line traversing the pupil. Transition zones between iris (IR) and cornea (CR) on both sides of the pupil are detected. Centre and ray of a circle passing by the detected positions from right and left transitions (TCI, TIC), between the iris and the cornea, are determined. The positions are detected by calculating energy of high frequency components of Fourier spectrum obtained by fast Fourier transform. An independent claim is also included for a device for locating a human iris in an image of an eye.