Iris location method based on combination of feature of eyes and geometry
Zhu Qiongyao · Computer Engineering and Applications Journal · 2013
Iris location is a very important pretreatment process in the iris recognition system. The speed and accuracy of iris location are required to achieve the performance of iris recognition system. According to the characteristics of the human eye, combining with the geometric method, this paper proposes a fast and accurate iris localization algorithm. It detects a point inside the pupil using the gray-scale features within the pupil before the boundary detection mask is employed to locate three noncollinear boundary points along the inner and outer boundaries respectively. These points constitute two right triangles. According to the Thales’theorem, the hypotenuse of the right triangle is the diameter of its circumcircle, and then the iris parameters can be calculated. A large number of experiments show that the algorithm in terms of speed and accuracy is improved compared to the classic location algorithm.