基于整数小波变换的大容量彩色水印嵌入技术

Large-capacity Color Watermarking Embedding Technology Based on Integer Wavelet Transform

结合整数小波变换无舍入误差、完全可逆的优点,提出了一种将彩色水印图像嵌入到彩色载体图像的水印算法,水印信息先嵌入到低频系数中,如有剩余再嵌入到高频系数中,而嵌入公式根据系数所处的频带不同而不同,最后从理论上对算法进行了性能分析.实验结果表明:该算法具有透明性好、嵌入容量大,嵌入效率高等特点,并且对常见的攻击具有鲁棒性.

Using the advantages of full reversibility and no rounding error of integer wavelet transform,a watermarking algorithm in which a color watermark image is embedded into a color host image is proposed.The watermark is embedded into low frequency coefficients firstly,and then any remaining is embedded into the high-frequency coefficients.According to the different coefficients of the frequency band,the embedding formulas differ.Finally the performances of the algorithms are analyzed in theory.Experiment results show that the algorithm has good transparency,large embedding capacity,high embedding efficiency and robust against common attacks.