一种基于空域的彩色图像的置乱数字水印算法

A Novel Color Image Scrambling Digital Watermarking Algorithm Based on Spatial Domain

数字水印技术能起到版权保护的作用。从数字水印的鲁棒性与不可感知性的要求出发,介绍了彩色图像空域中位平面分解图像的特征,提出了一种基于空域的彩色图像的置乱数字水印算法,这种数字水印算法是将数字水印置乱加密后嵌入到彩色图像位分解的第5位平面图像中,从而达到嵌入水印的目的。仿真实验表明该算法简单有效,原图像与嵌入水印后图像差异小,水印提取准确,不仅能保证数字水印不可感知性,而且在对嵌入水印图像进行各种加噪、裁剪、马赛克攻击等具有较强的鲁棒性。

Digital watermarking technology is a very good method to protect copyright. In terms of requisition of imperceptibility and robustness of watermarking, the bit plane image features of color image are introduced and a new image watermarking scheme based on spatial domain and Human Visual System is proposed. The scrambled digital watermarking is embedded in the fifth bit plane image of original image. The experimental results show that the proposed watermarking scheme is feasible and simple. The embedded watermarking images have tiny difference with the original images and the extracted watermark is accurate. Moreover,it is imperceptible and robust against various signals processing such as noise adding, cropping, brightness variations and mosaic, etc.