摘要： 传统零水印算法构造的水印通常是没有实际意义的二值序列,致使版权辨别不够直观快捷。借鉴视觉密码原理,结合平衡多小波、奇异值分解等技术,提出平衡多小波视觉密码零水印算法。将客户水印作为零水印嵌入到版权图像中,对版权图像进行平衡多小波变换得到实际载体;根据实际载体图像进行块奇异值分解并计算平衡因子得到差值矩阵,由差值矩阵生成过渡矩阵;将过渡矩阵结合2 × 2 视觉秘密图份算法生成图像特征信息;结合图像特征信息和客户水印信息产生零水印。实验结果表明,该算法具有良好的安全性和鲁棒性,是一种可靠的图像版权认证零水印算法。
关键词:
零水印,
视觉密码,
平衡多小波,
奇异值分解,
平衡因子
Abstract: Traditional zero watermarking algorithm constructs the watermark which is often not meaningful binary
sequence. This leads to that the copyright identification is not intuitive and fast. Referencing Robust watermarking algorithm based on visual code,combining with zero watermark thoughts,this paper puts forward a kind of meaningful zero watermarking algorithm based on visual code. To provide customers with a meaningful zero-watermarking embedding watermarks as copyright image to go. It uses balanced multi-wavelets transform to get the actual carrier. And does the actual carrier image block Singular Value Decomposition ( SVD) and calculates balanced factor to get the difference matrix,the matrix are generated by the difference of the transition matrix. The transition matrix combines 2 ×2 parts by visual secret algorithm to generate the image feature information. The algorithm uses the image feature information and customer watermark information to generate zero-watermark. Experimental results show that the algorithm has good security and robustness. It is a reliable image copyright authentication zero-watermarking algorithm.
Key words:
zero-watermarking,
visual cryptography,
balanced multi-wavelets,
Singular Value Decomposition(SVD),
balanced factor
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