Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2008.1043.1048Xiang-weiLi Zhan-mingLi Ming-xinZhang ZheWei Guo-quanZhang 7200877In this study, we propose a novel key frame extraction
algorithm based on Rough Sets (RS) in Discrete Cosine Transform (DCT)
compressed-domain. Firstly, we extract DCT coefficients in compressed-domain,
select and preprocess the DC coefficients that derived from DCT coefficients.
Secondly, We construct Information System with DC coefficients. Finally,
we reduce Information System using attributes reduced theory of RS and
obtained the representation of the video frames by reduced DC coefficients.
Experimental results show that the proposed algorithm is fast and effective.
Compared to conventional algorithm, our algorithm enjoys the following
advantages: (1) the numbers of the key frame extracted using our algorithm
become more scientific; (2) the algorithm can avoid the expensive computations
in decompression processes.]]>Money, A.G. and H. Agius,200719121143Aigrain, P., H. Zhang and D. Petkovic19963179202Jens-Rainer M.O., V.V. Vasudevan and A. Yamada,200111703716Fan, J. and Y. Ji, 200412306347Sze, K.W., K.M. Lam and G. Qiu,20051511481155Lee, M.H., H.W. Yoo and D.S. Jang,2006311325Cooper, M., T. Liu and E. Rieffel,20079610619Wu, Q.Z., H.Y. Cheng and B.S. Jeng,200526555563Khayam, S.A.,20032003De Bruyne, S., D.V. Deursen, J.D. Cock, W.D. Neve, P. Lambert and R. van de Walle,200823473489Liu, T., H.J. Zhang and F. Qi, 20031310061014Shuping, Y. and L. Xinggang,200510169172