【作者】 张旭； 张贵仓；

【Author】 Zhang Xu Zhang Guicang (College of Mathematics and Information of Northwest Normal University,Lanzhou 730070)

【机构】 西北师范大学数学与信息科学学院；

【摘要】 提出一种基于人类视觉特性和小波包分解的数字水印算法,该算法充分利用小波包分解的特点,将水印信息有选择地嵌入到原始图像中,水印的嵌入强度和嵌入位置均根据原始图像的内容自适应地决定。理论分析和实验结果表明,该算法很好地解决了水印鲁棒性和不可见性之间的矛盾,对一般的图像处理和攻击如JPEG压缩、滤波、加噪声、裁剪等有很好的鲁棒性。更多还原

【Abstract】 We presented a novel watermarking method based on wavelet packets transform and Human Visual System(HVS).The algorithm made use of the characters of wavelet packets transform.The watermark was embedded in the original image which the embedding strategy and the watermark strength were adaptively determined by the original image’s content.Theoretical analysis and experiment results show that the algorithm solved the conflict of the watermark robustness and perceptual invisible.It has better imperceptibility than the former one.And it is robust against normal image processing and kinds of attacks,such as JPEG compression processing,filtering processing, adding noise and cutting processing etc.更多还原