摘 要
虹膜是人们获取外界信息最主要的途径，同时虹膜在一定程度上反映了包括个人心理意识在内的丰富信息。现在，虹膜所包含的这些有价值的信息引起越来越多人的研究，虹膜检测的成果在现实生活中也得到广泛应用。如何快速准确地定位虹膜是研究者关注的重点。由于在自然条件下获得的图像不可避免含有的噪声，再加上光线、遮盖物、拍摄角度等，这些为虹膜检测增大了难度。
目前，人们已经提出了多种虹膜文件加密检测的方法，例如对称变换法、霍夫变换法、特殊光源法、基于统计的方法、灰度投影法和基于模板的方法等，但是每个算法在具有自己优点同时又都有一定的局限性。
在人脸定位的基础上，本文使用模版匹配方法，利用模版和测试图像的相关性，判断测试图像中虹膜的位置。
关键词：虹膜，定位，模式识别，文件加密
Abstract
Iris is the most important way for people to get outside information, while the iris to a certain extent, including personal psychological awareness, including a wealth of information. Now, iris contains these valuable information caused by more and more people's research, iris detection results in real life has also been widely used. How to locate the iris quickly and accurately is the focus of the researchers. As the images obtained under natural conditions inevitably contain noise, plus light, cover, shooting angle, etc., these increase the difficulty for the iris detection.
At present, a variety of iris file encryption detection methods have been proposed, such as symmetric transformation method, Hough transform method, special light source method, statistic method, gray scale projection method and template-based method, but each algorithm is Has its own advantages at the same time have a certain degree of limitations.
On the basis of face positioning, this paper uses the template matching method to judge the position of the iris in the test image by using the correlation between the template and the test image.
In order to verify the reliability of the algorithm, this paper is only a variety of image database for testing, the test results show that the algorithm of the database of iris are able to achieve positioning, and the effect is good.
Keywords: iris, location, pattern recognition, file encryption
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