文章基本信息

标题：A Novel Image Encryption Supported by Compression Using Multilevel Wavelet Transform
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作者：Ch. Samson ; V. U. K. Sastry
期刊名称：International Journal of Advanced Computer Science and Applications(IJACSA)
印刷版ISSN：2158-107X
电子版ISSN：2156-5570
出版年度：2012
卷号：3
期号：9
DOI：10.14569/IJACSA.2012.030926
出版社：Science and Information Society (SAI)
摘要：In this paper we propose a novel approach for image encryption supported by lossy compression using multilevel wavelet transform. We first decompose the input image using multilevel 2-D wavelet transform, and thresholding is applied on the decomposed structure to get compressed image. Then we carry out encryption by decomposing the compressed image by multi-level 2-D Haar Wavelet Transform at the maximum allowed decomposition level. These results in the decomposition vector C and the corresponding bookkeeping matrix S. The decomposition vector C is reshaped into the size of the input image. The reshaped vector is rearranged by performing permutation to produce encrypted image. The vector C and the matrix S serve as key in the process of both encryption and decryption. In this analysis, we have noticed that the reconstructed image is a close replica of the input image.
关键词：thesai; IJACSA; thesai.org; journal; IJACSA papers; Image compression; wavelet transform; thresholding; image encryption; compression ratio.