On the basis of linear discriminate analysis(LDA) algorithm,this paper proposes a new subspace approach called as local LDA(LLDA),which pays more attention to the separability of neighbor classes.The graphic embedding is then applied to offer a better understanding of LLDA.Aiming at the(SSS) problem in LLDA,the paper proves that the conventional principle component analysis(PCA) preprocessing approach for LDA is not suitable for the proposed LLDA algorithm.Then,the paper presents an improved LLDA algorithm ...