基于不同Margin的人脸特征选择及识别方法  

Face Feature Selection and Recognition Based on Different Types of Margin

作　　者：李伟红[1] 陈伟民[1] 杨利平[1] 龚卫国[1] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044

出　　处：《电子与信息学报》2007年第7期1744-1748,共5页Journal of Electronics & Information Technology

基　　金：国家教育部科学研究重点项目(02057);重庆市自然科学基金重点研究项目(CSTC2005BA2002);重庆市自然科学基金(CSTC2005BB2181)资助课题

摘　　要：Margin在机器学习中具有很重要的意义,基于margin的特征选择方法就是从分类的角度对特征集各特征的权重进行分析。该文对不同的margin进行了分析,提出将sample-margin和hypothesis-margin分别作为特征选择标准对SBS特征选择方法进行改进,然后设计具有最佳超参数的SVM多项式分类器进行人脸识别。实验在FRERT人脸图像库上进行并与Relief特征选择方法进行了比较,对SVM和NN分类器的实验结果也进行了分析。实验结果显示:该文提出的人脸识别特征选择及识别方法是有效、适用的。Margin plays an important role in research of machine learning. Margin-based feature selection methods choose the weights of features from the view of classification. This paper analyzes different types of margin and proposed methods to improve the Sequential Backward Selection （SBS） method respectively using sample-margin and hypothesis-margin as feature selection criterion. A SVM polynomial classifier, which has optimal hyper-parameters, is then designed for face recognition. Experiments are conducted on FERET face database. Recognition accuracies between the proposed methods and relief feature selection method are compared. Experiments are also conducted by respectively using SVM and Nearest Neighbor （NN） classifier. Experimental results indicate that the proposed feature selection and recognition methods are efficient for face recognition.

关 键 词：人脸识别 MARGIN 特征选择 支持向量机(SVM) 顺序后退法(SBS) 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]