一种改进的基于DWT-SVD的双彩色数字图像水印算法

数字水印技术以不可见的方式把具有特定含义的水印数据嵌入到数字媒体中，有效解决了版权保护问题.鉴于水印图像的鲁棒性和不可察觉性是评价数字水印算法的重要参考依据的问题，提出了一种YCbCr颜色空间中基于离散小波变换和奇异值分解的数字图像水印算法.几何攻击测试结果表明该方法比其他方法具有更强的鲁棒性.

An Improved Double Color Digital Image Watermarking Algorithm Based on DWT-SVD

For copyright protection,digital watermarking technique enables watermark data with specific meaning to be embedded into the digital media in an invisible manner.Two important properties of watermarked image-robustness and imperceptibility must be considered in watermarking algorithm research.Accordingly,we propose a watermarking algorithm by using discrete wavelet transformation and singular value decomposition in YCbCr color space.Experiment shows that this method is more robust against various geometric attacks than other methods.