Iris location algorithm based on geometric features and grey information
Lihui Jiang · Infrared and Laser Engineering · 2006
A new location algorithm is presented,which is based on geometric features and grey scale information.Firstly,because of iris's circular features,the advanced circular Hough transform is employed to deduce the radius and center coordinates of iris boundaries.The detection of the iris/pupil boundary is performed within the iris region,instead of the whole eye region.So a lot of useless information is isolated keeping the whole iris information.Successful results of noise(eyelids,eyelashes and specular reflections)isolation are achieved using geometric and thresholding methods,which is the base of the exact iris recognition.The:MATLAB simulation results show the good accuracy and robustness of the proposed location algorithm.