基于多小波变换与QAR编码的信息隐藏算法

Information Hiding Algorithm based on Multi-wavelet Transform and QAR Coding System

针对信息隐藏算法中常见的不可见性和鲁棒性相矛盾且不具备检错能力的缺点,提出一种新的基于多小波变换与QAR编码的信息隐藏算法。该算法利用CARDBAL2多小波变换、GHM多小波变换和lαβ颜色空间转换等方法对数字图像载体进行预处理,再将经过QAR(Quotient and remainder)编码的秘密信息嵌入到预处理后的载体图像中以生成含秘图像,从而达到将秘密信息安全传输的目的。实验结果显示,算法的优势在于其不可见性、鲁棒性和感知篡改性。

Aiming at the contradiction of between invisibility and robustness and at the lack of errordetecting capacity for common information hiding algorithms, a novel algorithm based on multi-wavelet transform and QAR coding system is proposed. The digital image carrier in this scheme is preprocessed with CARDBAL2, GHM transform and lαβ color space translation, and then, the secret information coded by QAR system is embedded into preprocessed carrier for production of a stego image, thus to realize secure communication of the confidential information. The experimental results indicate that the proposed algorithm exhibits clear superiorities in invisibility, robustness and the sensitivity for distortion.