基于透视投影的人眼视线方向估计算法  

Visual Direction Estimation Algorithm Based on Perspective Projection

作　　者：许洁[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院

出　　处：《微型电脑应用》2009年第9期36-38,44,共4页Microcomputer Applications

摘　　要：论文研究了一种利用单目图像估计人眼视线方向的算法。基于透视投影原理的人眼视线定位方法,可从双眼的虹膜轮廓中有效地估算出人眼视线方法,但其估计精度依赖于虹膜轮廓的定位精度。在此方法的基础上,引入Retinex算法以及基于椭圆匹配的迭代算法,从双眼的边缘图像中获得虹膜轮廓的精确位置,实现了人眼视线方向的准确估计。实验结果表明,所提算法对于实际拍摄的人脸图像,能准确地估计出人眼视线方向。In this paper,we investigate an algorithm to estimate the visual direction only using a single monocular image.The gaze estimation method,which is based on perspective projection principle,can effectively find the visual direction using iris contours,but its estimation accuracy largely depends on the extraction of iris contours.On the basis of the method,the paper introduces Retinex algorithm,as well as an ellipse fitting iterative approach,to achieve the precise location of iris contours from two eyes' edge image,and realizes the accurate estimation of the visual direction.The experiments over real facial images demonstrate that the proposed algorithm can obtain accurate estimation of the visual direction.

关 键 词：人眼视线方向估计 单目图像 透视投影 RETINEX算法 椭圆匹配 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]