• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2011, Vol. 33 ›› Issue (7): 89-91.

• 论文 • 上一篇    下一篇

一种改进的线性判别分析算法在人脸识别中的应用

刘忠宝   

  1. (1.江南大学信息工程学院,江苏 无锡 214122;2.山西大学商务学院信息学院,山西 太原 030031)
  • 收稿日期:2010-07-20 修回日期:2010-11-18 出版日期:2011-07-21 发布日期:2011-07-25
  • 作者简介:刘忠宝(1981),男,山西太谷人,博士,助教,CCF会员(E200015757G),研究方向为模式识别和人工智能。

An Improved LDA Algorithm and Its Application to Face Recognition

LIU Zhongbao   

  1. (1.School of Information Engineering,Jiangnan Univerisity,Wuxi 214122;
    2.Department of Information Engineering,School of Business,Shanxi University,Taiyuan 030031,China)
  • Received:2010-07-20 Revised:2010-11-18 Online:2011-07-21 Published:2011-07-25

摘要:

线性判别分析算法是一种经典的特征提取方法,但其仅在大样本情况下适用。本文针对传统线性判别分析算法面临的小样本问题和秩限制问题,提出了一种改进的线性判别分析算法ILDA。该方法在矩阵指数的基础上,重新定义了类内离散度矩阵和类间离散度矩阵,有效地同时提取类内离散度矩阵零空间和非零空间中的信息。若干人脸数据库上的比较实验表明了ILDA在人脸识别方面的有效性。

关键词: 线性判别分析, 类内离散度矩阵, 类间离散度矩阵, 人脸识别

Abstract:

Linear discriminant analysis (LDA) is a typical feature extraction method, but there exist at least two critical drawbacks in LDA: the small sample size problem and the rank limitation problem. In order to solve the above problems, this paper presents an improved LDA method (ILDA) which redefines the betweenclass scatter matrix and the withinclass scatter matrix. ILDA can effectively extract the discriminative information included in the null subspace and the nonnull subspace of a withinclass scatter matrix. Numerical experiments on some facial databases show ILDA achieves good performance of face recognition.

Key words: linear discriminant analysis(LDA);withinclass scatter matrix;betweenclass scatter matrix;face recognition