【摘要】 利用虹膜的几何特征及平面几何的知识,提出了一种支持嵌入式系统的虹膜定位算法。即通过移动两条经过瞳孔且相互垂直的弦来定位虹膜内边缘;并利用巩膜与虹膜的灰度值悬殊这一特点,对图像反相处理来突出巩膜,再确定虹膜外边缘上的六个点,从而定位虹膜外边缘。算法避免了搜索的盲目性,实时性有较大改善,能较好地支持嵌入式系统。更多还原

【Abstract】 Based on the geometrical characteristic of iris and knowledge of plane geometry,an algorithm for rapid iris location applied in the imbedded system is proposed.The inner edge of the iris is positioned by moving two chords,which are vertical to each other and pass through the pupil;The image is inverted to make the sclera prominent,by taking the advantage of the great difference of grey value between the sclera and the iris,so that the six points of the outer boundary of the iris are located.Consequently,the outer edge of the iris are figured out.This algorithm reduces the blindness of the search process and has an improvement on real time.So,it can preferably support the imbedded system.更多还原