CAJ | 학술논문

虹膜定位是虹膜识别系统中重要的预处理过程,其定位精度和速度决定了虹膜识别系统的性能.就此,根据人眼的特征,结合几何方法,提出了一种快速准确的虹膜定位算法.该算法根据瞳孔内部灰度特点,在瞳孔内找到一点.利用边缘检测模版,依据该点,分别在虹膜内边界和外边界上找到各自不共线的三个边界点,构成两个直角三角形.根据几何原理,这两个直角三角形的斜边分别为内外边界圆的直径,从而定位虹膜边界参数.大量实验证明,该算法在速度和精度上相比经典定位算法均有提高.
홍막정위시홍막식별계통중중요적예처리과정,기정위정도화속도결정료홍막식별계통적성능.취차,근거인안적특정,결합궤하방법,제출료일충쾌속준학적홍막정위산법.해산법근거동공내부회도특점,재동공내조도일점.이용변연검측모판,의거해점,분별재홍막내변계화외변계상조도각자불공선적삼개변계점,구성량개직각삼각형.근거궤하원리,저량개직각삼각형적사변분별위내외변계원적직경,종이정위홍막변계삼수.대량실험증명,해산법재속도화정도상상비경전정위산법균유제고.
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 non-collinear 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.