In this paper,several algorithms of Locality Preserving Projections(LPP) for image retrieval are introduced,the basic characteristic of algorithms based on LPP are analyzed and indicated.

• 对国际上近来提出的保局投影(LPP)算法在图像检索中的最新应用研究进行了详细介绍;分析指明了几种基于LPP的图像检索算法的特点;