RNS在彩色图像水印中的应用

图像水印技术中,如何平衡鲁棒性和不可见性是技术的难点.余数系统(Residue Number System,RNS)基于中国剩余定理(Chinese Remainder System,CRT),多用于数字信号处理等领域.论文先利用Arnold置乱水印图像,再利用RNS的算法思想将水印图像分解为三通道,分别嵌入到载体图像...

Application of RNS in Color Image Watermarking

How to balance robustness and invisibility is the most difficult problem in image watermarking technology. Residue number system is mostly used in digital signal processing fields which is based on Chinese remainder system. In this paper,the watermarking image is changed with Arnold image-scrambling,and the watermarking image is decomposed into three channels and embedded into the DCT domain of the RGB component of the carrier image using RNS. Considering the robustness of human visual system and watermarking,the location of embedding is chosen in the intermediate frequency region of DCT transform domain. The experimental results show that the algorithm can embedding watermarking in color images well,and can resist common attacks of image processing,such as cutting,noise,filtering,etc. It has strong robustness and good invisibility.