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为了研究图像压缩与加密同步进行问题, 本文提出了一种在变换域下的图像加密与压缩关联算法在该算法中, 加密过程发生在小波变换与SPIHT编码之间它充分利用了离散小波变换和基于层次树的集合划分(set partitioning in hierarchical trees, SPIHT)编码属性, 扩散过程被限制在单个子带内部. 此外, 混淆过程保留了SPIHT编码中两个最重要的位和符号位, 它包含了图像的重要信息. 实验结果表明, 算法具有良好的安全性、图像重构视觉质量以及很高的加/解密速度.
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关键词:
- 密码系统 /
- 压缩 /
- 离散小波变换(DWT) /
- 基于层次树的集合划分(SPIHT)
A joint of image encryption and compression is investigated, and a novel joint encryption and compression scheme is proposed. In our scheme, the encryption process is performed before compression. Making use of the properties of discrete wavelet transform (DWT) and Set Partitioning in Hierarchical Trees (SPIHT) coding, confusion is restricted to the interior of single subband image itself and so image details are retained. Furthermore, diffusion preserves the two most significant bits (MSBs) and the sign bit, which contain important information about the image. The experiments show that the proposed algorithm possesses a good visual quality of the reconstructed image and a high encryption speed.-
Keywords:
- cryptography /
- compression /
- discrete wavelet transform (DWT) /
- set partitioning in hierarchical trees (SPIHT)
[1] Wen J, Kim H, Villasenor J D 2006 IEEE trans. Signal Process Letter 13 69
[2] Kim H, Wen J, Villasenor J D 2007 IEEE trans. Signal Process. 55 2263
[3] Bose R, Pathak A 2006 IEEE Trans. Circuits Syst. I 53 848
[4] Wong K W, Yuen C H 2008 IEEE trans. Circuits Syst. II 55 1193
[5] Mao Y N, Wu M 2006 IEEE Trans, Image Processing. 15 2061
[6] Brown R, Chua L O 1996 Int. J. Bifurc. Chaos 6 219
[7] Fridrich J 1998 Int. J. Bifurc. Chaos 8 1259
[8] Jakimoski G, Kocarev L 2001 IEEE Trans. Circuits Syst. I 48 163
[9] Dachselt F, Schwarz W 2001 IEEE Trans. Circuits Syst. I 48 1498
[10] Said A, Pearlman W A 1996 IEEE Trans, Image Processing 5 1303
[11] Shapiro J M 1993 IEEE Trans. Signal Processing 41 3445
[12] Luo R C, Chung L Y, Lien C H 2002 IEEE Trans. Industrial Electronics 49 933
[13] Chan K S, Fekri F 2004 IEEE Trans. Signal Processing. 52 2975
[14] Lian S, Sun J, Wang Z 2004 IEEE Int. Conf. Multimedia Exp. 3 2195
[15] Shannon C 1949 Bell System Tech. J. 28 656
[16] Lin R, Mao Y B, Wang Z Q 2008 Proc IEEE Int Conf. Communications and Networking in China 1294
[17] David Salomon 2006 Data Compression Third Edition (Springer ISBN 0-387-40697-2)
[18] Kohda T, Tsuneda A 1997 IEEE Trans Inform Theory 43 104
[19] Said A, Pearlman W A 1996 IEEE Trans, Circuits Syst for Video Tech. 6 243
[20] Behnia A, Akhshani A, Ahadpour S, Mahmodi H, Akhavand A 2007 Phys. Lett. A 366 391
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[1] Wen J, Kim H, Villasenor J D 2006 IEEE trans. Signal Process Letter 13 69
[2] Kim H, Wen J, Villasenor J D 2007 IEEE trans. Signal Process. 55 2263
[3] Bose R, Pathak A 2006 IEEE Trans. Circuits Syst. I 53 848
[4] Wong K W, Yuen C H 2008 IEEE trans. Circuits Syst. II 55 1193
[5] Mao Y N, Wu M 2006 IEEE Trans, Image Processing. 15 2061
[6] Brown R, Chua L O 1996 Int. J. Bifurc. Chaos 6 219
[7] Fridrich J 1998 Int. J. Bifurc. Chaos 8 1259
[8] Jakimoski G, Kocarev L 2001 IEEE Trans. Circuits Syst. I 48 163
[9] Dachselt F, Schwarz W 2001 IEEE Trans. Circuits Syst. I 48 1498
[10] Said A, Pearlman W A 1996 IEEE Trans, Image Processing 5 1303
[11] Shapiro J M 1993 IEEE Trans. Signal Processing 41 3445
[12] Luo R C, Chung L Y, Lien C H 2002 IEEE Trans. Industrial Electronics 49 933
[13] Chan K S, Fekri F 2004 IEEE Trans. Signal Processing. 52 2975
[14] Lian S, Sun J, Wang Z 2004 IEEE Int. Conf. Multimedia Exp. 3 2195
[15] Shannon C 1949 Bell System Tech. J. 28 656
[16] Lin R, Mao Y B, Wang Z Q 2008 Proc IEEE Int Conf. Communications and Networking in China 1294
[17] David Salomon 2006 Data Compression Third Edition (Springer ISBN 0-387-40697-2)
[18] Kohda T, Tsuneda A 1997 IEEE Trans Inform Theory 43 104
[19] Said A, Pearlman W A 1996 IEEE Trans, Circuits Syst for Video Tech. 6 243
[20] Behnia A, Akhshani A, Ahadpour S, Mahmodi H, Akhavand A 2007 Phys. Lett. A 366 391
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