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佳木斯大学毕业论文

基于Matlab的人脸识别系统设计与仿真

学 院 信息电子技术 专 业 电子信息工程 班 级 11级1班 姓 名 杨 雷 指导教师 周经国

佳 木 斯 大 学

2015年6月10日

0

摘要

人脸识别即指利用分析比对人脸视觉特征信息从而达到身份鉴别效果的计算机技术。人脸识别是一项当下十分热门的计算机技术的研究领域，该项技术可以人脸明暗侦测，并且自动调整动态曝光补偿，同时对人脸追踪侦测，并自动调整影像放大；这项技术属于生物特征识别技术的一种，是利用生物体（一般指人）本身的生物特征从而达到区分生物体个体的目的。

人脸识别技术目前主要用做身份识别。由于视频监控的飞速普及，使这项应用迫切的需要一种能实现在用户非配合状态下、远距离的进行快速身份识别的技术，以求能在远距离之下快速识别人员身份，从而实现智能预警的功能。最佳的选择无疑是人脸识别技术。采用快速人脸检测识别技术可以从视频监控图象中实时捕获到人脸信息，并与人脸数据库中的已存信息进行实时比对，从而达到快速身份识别的效果。

报告利用MATLAB软件来实现人脸信息检测与识别，利用YCbCr空间以及灰度图像来实现人脸的边缘分割, 将真彩图像转换为灰度图像，并根据肤色在YCbCr色度空间上的分布范围，来设定门限阀值，从而实现人脸区域与非人脸区域的分割，通过图像处理等一系列的操作来剔除干扰因素，再通过长宽比和目标面积等方法在图像中定位出人脸区域，经试验，该方法能够排除面部表情、衣着背景、发型等干扰因素，从而定位出人脸区域。

关键词：Matlab软件；灰度图像；边缘分割；人脸区域

Abstract

Face recognition especially use comparative analysis face visual feature information for identification of computer technology. Face recognition is a , light and shade can be automatically adjusted dynamically exposure compensation, face tracking detection, automatic adjustment of image magnification; It belongs to the biometric identification technology, it is of organisms (generally refers to a person) individual biological characteristics to distinguish between the organism itself.

Face recognition is mainly used for identification. Because of the video monitoring is fast popularization, many of the video monitoring application is an urgent need to a long distance, the user not cooperate condition of rapid identification technology, in order . Face recognition technology is undoubtedly the best choice, the fast face detection technology to monitor in real-time video image search from face, and with real-time than face database, so as to realize rapid identification.

Report using MATLAB software to realize face information detection and recognition, using YCbCr space and gray image to realize the face edge segmentation, the true color image is converted to a grayscale image, and according to the color of skin in YCbCr chroma space distribution, to set the threshold threshold, so as to realize the segmentation of face region with the face region, through a series of operations such as image processing to eliminate interference factors, and through such means as aspect ratio and the target area locate the face region in the image, the experiment, this method can eliminate facial expressions, clothes, .

Keywords：Matlab；Gray image；edge segmentation；face region