%0 Journal Article %A TIAN Xiao-ping %A WU Cheng-mao %T Study on image scrambling degree using singular value decomposition of difference image %D 2010 %R 10.3778/j.issn.1002-8331.2010.23.046 %J Computer Engineering and Applications %P 162-165 %V 46 %N 23 %X A new image scrambling effect evaluation method based on singular value decomposition of difference image is proposed.Considering the shortcoming of singular value decomposition based image scrambling degree evaluation method not being capable of reflecting that image scrambling effect is good or bad,this paper first obtains the one and two order difference images of the original image and scrambled image by means of difference operation on two images,then the two kinds of difference images are decomposed by singular value decomposition,lastly the discrepancy degree of Singular values of difference images is acted as the new criteria of image scrambling effect evaluation.Experimental results show that the proposed method is effective to describe the relation between the scrambling effect and the number of iterations in the scrambling techniques,which largely consists with human vision.For different images,when some transformation is used,this evaluation method can reflect to some extent the scrambling effects in each scrambling stage. %U http://cea.ceaj.org/EN/10.3778/j.issn.1002-8331.2010.23.046