基于幅度调制的彩色图像水印算法研究

Research on Color Image Watermark Algorithm Based on Amplitude Modulation

采用幅度调制方式,实现了具有透明性及鲁棒性的彩色图像盲水印算法。先将二值水印信号进行Arnold变换置乱,再与混沌随机序列进行异或运算。在水印嵌入过程中通过平滑滤波来均衡调整嵌入水印后对宿主图像影响的强度。水印嵌入是通过修改图像中像素蓝色通道信息来实现的,而水印提取是基于对嵌入水印位置的邻域像素值的线性组合的预测而完成的。仿真实验证明该文算法不仅具有非常好的透明性,而且对噪声叠加、旋转、剪切、JPEG压缩等攻击具有很好的鲁棒性。

Amplitude modulation methods used to achieve transparency and robustness of the color image blind watermarking algorithm. Watermark first binary signals scrambling arnold transform, and then with the chaotic random sequence XOR operator. Watermark embedding in the process of filtering through to a balanced adjustment embedded watermark image after the impact of the strength of the host. Watermark embedding is by modifying the image pixel information to the realization of the blue channel, and the watermark extraction is based on the location of embedded watermark neighborhood pixel value a linear combination of forecasts completed. The simulation results show the text algorithm not only has a very good transparency, but also for the noise overlay, rotation, shear, JPEG compression and other attacks have good robustness.