小波域最小嵌入失真函数设计及其在隐写中的应用  

Design of minimizing embedding impact function in DWT domain and its applications in steganography

作　　者：李军[1] 潘峰[2,3] 杨晓元[2,3] 刘镇[1] 

机构地区：[1]武警工程大学电子技术系网络与信息安全武警部队重点实验室,西安710086 [2]西安电子科技大学网络信息安全教育部重点实验室,西安710071 [3]武警工程大学网络与信息安全研究所,西安710086

出　　处：《中国图象图形学报》2012年第8期946-952,共7页Journal of Image and Graphics

基　　金：国家高技术研究发展计划(863)基金项目(2007AA01Z429);陕西省自然科学基金项目(2010JM8034);武警工程大学基础基金项目(wjy201027)

摘　　要：为了提高隐写方案的安全性,提出一种基于最小嵌入失真原理和网格码的图像隐写算法。首先在离散小波域结合人眼视觉特性和整数提升小波变换设计了失真测度函数,主要考虑了亮度、频率和纹理掩蔽因子对载体失真的影响。然后结合网格码设计了隐写算法,将嵌入信息对载体的修改最小化并且集中在人眼不敏感区域。实验结果显示,方案具有良好的视觉不可见性,且能抵抗空域、小波域等隐写分析的攻击,安全容量达到0.4 bits/pixel。In order to improve the security of steganography system, an image steganography method based on Minimizing Embedding Impact and Syndrome-Trellis Codes is proposed. First, a distortion function in discrete wavelet transform （DWT） domain was designed according to human visual system and integer lifting wavelet transform, which is mainly con- cerned about the influences of frequency, luminance, and texture masking factor to the cover distortion. Then, the Syn- drome-Trellis Codes are combined with the distortion function to propose the steganography method, to make sure that the embedding impact on the cover minimizing and centralizing is in the un-sensitivity domain. Experiments show that the pro-posed approach maintains a good visual quality of the stego-image and has a high security against steganalysis in space and wavelet domain. The security capacity can be about O. 4 bits/pixel.

关 键 词：隐写 最小嵌入失真 网格码 人眼视觉特性 整数提升小波 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]