A biometric system provides automatic recognition of an individual based on some sort of unique feature or characteristic possessed by the individual. program to locate the postion of eyes.

bch纠错码，可以根据自己需要设置纠错强度，过信道后纠错效果良好(We provide formal definitions and efficient secure techniques for turning noisy information into keys usable for any cryptographic application, and, in particular,reliably and securely authenticating biometric data.)

人脸识别，是基于人的脸部特征信息进行身份识别的一种生物识别技术。用摄像机或摄像头采集含有人脸的图像或视频流，并自动在图像中检测和跟踪人脸，进而对检测到的人脸进行脸部的一系列相关技术，通常也叫做人像识别、面部识别(Face recognition is a biometric recognition technology based on human face feature information for personal identification. With the acquisition