一种基于图像内容的数字水印算法

有望解决数字媒体版权纠纷的数字水印技术须满足3个相互冲突的基本要求:不可见性、健壮性和嵌入容量。应用信息论中多维无记忆加性高斯信道容量公式,提出一种基于图像内容的高容量算法。算法在保证水印不可见性的前提下,尽可能多地嵌入强度大的水印信息。水印的检测不需要原始图像,属于盲水印算法。仿真结果表明,运用该算法在图像中能嵌入较多的水印信息,同时具有很好的健壮性。

An Image Content-based Digital Watermarking Algorithm

As a promising means to resolve the copyright infringement of digital media,the digital watermarking technique must satisfy three basic conflicting requirements:imperceptibility,robustness and watermarking capacity.In this paper,we apply the capacity formula for multi-dimensional memoryless additive Gaussian channels in information theory and propose a novel image content-based high capacity algorithm.More watermark messages are embedded into an image as strongly as possible on the premise of the watermark's imperceptibility.During the watermark detection stage,it doesn't need the original image and thus is a blind scheme.Simulation results demonstrate its robustness and high watermarking capacity simultaneously.