基于潜在语义分析的视频检索.pdfVIP

33 13 2007 7 Vol.33 No.13 Computer Engineering July 2007 ·· 2007 A TP37 (4 710025) Video Retrieval Based on Latent Semantic Analysis HU Shuangyan, LI Junshan, LI Jianjun (Graduate Team 4, Second Artillery Engineering College, Xi’an 710025) AbstractLatent semantic analysis is based on video analysis. It constructs the video feature matrix via a kind of mapping and realizes video based content retrieval. The paper discusses the main idea of latent semantic analysis and researches the method color texture extraction. The result proves latent semantic analysis performs preferable in content based video retrieval. Key wordscontent based video retrieval; latent semantic analysis; singular value decomposition 1990 University of Chicago, Bell Communications Research University of Western Ontario Scott Deerwester, Thomas K.Landauer 5 (Latent Semantic AnalysisLSA) Step1 M N A M N A ij M i Nj Step2 A T T T S diag (σ ,σ , …,σ ) A = USV UU = VV =I 1 2 L σ ≥σ ≥ …σ ≥ 0 L=min(M,N ) 1 2 L A L k A ~ A U k S k VkT (1) [1] Uk U k Sk A k