基于双置乱与奇异值分解的彩色图像水印算法

A Watermarking Algorithm for Color Images Based on Double Scrambling and SVD

提出了一种基于水印和载体双双置乱的安全水印算法。首先将载体图像由RGB色彩空间转换为YUV彩色空间,再经Fibonacci变换置乱后,对Y分量进行8×8分块,对各块进行奇异值分解。将二值图像经过Arnold置乱后嵌入到Y分量的各块的奇异值中。经仿真实验证明,该算法对JPEG压缩、剪切、旋转、滤波等几何攻击具有比较好的稳健性。

A secure watermarking algorithm based on watermark and the double carrier scrambling is proposed. Firstly, the carrier image is transformed from RGB color space into YUV color space. After scrambling Fibonacci transfonnation ,the Y component is divided into 8 × 8 blocks and singular value decomposition for each block is conducted. Through Arnold, the binary image is embedded into singular value of each block of Y component. Simulating experiments show that the algorithm has better robustness for JPEG compression, cropping, rotation, filtering, and geometric attacks.