摘要
为了能够有效提高虹膜检测和定位的质量、准确性和速度,排除光线照射、噪声或是拍摄的角度等不利因素对定位结果的影响,提出一种虹膜的定位算法。该方法首先在对图像进行预处理的基础之上,运用共形几何代数理论的思想,将欧氏空间中的几何量变换到共形几何代数空间中去,这些几何量在共形几何代数空间中都是以统一的矢量形式表示,从而使这些几何量之间的计算更加方便、简洁;最后借助Radon变换对目标圆,即虹膜的内外圆所在的平面进行检测,实现虹膜的定位。实验结果表明,该方法简单快速且虹膜定位结果准确,抗干扰的能力强,最重要的是实现了对虹膜内外边缘的同时定位,这对提高虹膜检测和定位的效率有着重要的意义。
This paper proposed a new localization algorithm of iris to improve the quality, accuracy and speed of iris detection and localization effectively, and exclude the influence of the adverse factors such as the light exposure, noise or the angle of the shot on the positioning results. Firstly, this method was based on the preprocessing of the image, using the theory of conformal geometric algebra to transform the geometric transformation of Euclidean space into conformal geometric algebra space. It expressed these geometric quantities in the form of vector in the conformal geometric algebra space that the calculation of these geometric quantities was more convenient and simple. Finally, it performed the Radon transform to detect the edge of the target circle and the inner and outer edges of the iris to realize the ｜ocalization of iris. The results of the experiment show that this method is simple, rapid and accurate, and has strong ability of anti-disturbance. The most important is to achieve a simultaneous localization of the inner and outer edge of the iris that has important significance to improve the efficiency of iris detection and localization.
出处
《计算机应用研究》
CSCD
北大核心
2017年第6期1889-1891,1899,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(81460279)
内蒙古自治区教育厅资助项目(NJZZ14161)
包头市科技局资助项目(2015C2006-14)
关键词
预处理
虹膜定位
共形几何代数
矢量计算
RADON变换
pretreatment
iris location
conformal geometric algebra
vector calculation
Radon transform
