基于带参数整数小波变换可见数字水印

A Visible Digital Watermark Based on Integer Wavelet Transform with Parameters

构造出了带参数的整数小波,应用变型的Rijndael密码构造出了Hash函数.提出了一种基于带参数整数小波变换、离散余弦变换及变型Rijndael加密算法的可见数字水印算法.利用整数小波的参数变化,并结合Hash函数保证了水印的安全,同时使得该可见数字水印满足公开密码体制.通过理论分析和实验证明,该方法能够保证图像的质量和水印的安全,在版权保护方面具有广阔的应用前景.

An Integer Wavelet Transform with parameters is firstly constructed and the transmutative Rijndael code is used to construct a Hash function, and then a visible digital watermark algorithm based on the Integer Wavelet Translation with parameters, Discrete Cosine Transform (DCT) and the Transmutative Rijndael encryption algorithm are presented. The change of parameters of the integer wavelet and the Hash function guarantees the security of the watermark which satisfies the public-key system. By theoretical analysis and numerous experiments, it is shown that a wide prospect for this algorithm can guarantee the quality of the image and the safety of the watermark.