DWT域彩色图像水印系统设计与实现

Design and Realization of Color Image Watermarking System in DWT Domain

在彩色图像DWT域里设计和实现了一个图像水印系统,包含水印的生成、嵌入和验证。为满足系统隐蔽性、鲁棒性和安全性要求,使用混沌加密算法生成水印,水印嵌入采用遗传算法(GA)寻找最优嵌入位置和强度,快速协同神经网络算法(F-SNN)验证水印。相关实验结果及分析验证了系统方案的可行性和有效性。

A color image watermarking system in DWT domain is proposed to meet the watermarking properties： security, imperceptibility and robustness. Watermark comes from a meaningful gray image encrypted by two dimensional chaotic stream encryption. In the procedure of watermark embedding, the watermark is embedded into host color image through se letting and modifying the wavelet coefficients using GA to improve the imperceptibility. In order to identify the owner of extracted watermark,F-SNN is used in the watermarking identification to overcome the limitation of correlation analysis or the human sense organ after some attacks. The results of our realization show that this system has preferable performance.