摘要
本文提出一种基于混沌映射和遗传算法的鲁棒公开图像水印技术.随机选取若干子块,并在子块中随机选取一个像素点,通过修改该点像素值与子块的均值之间的大小关系来隐藏水印信息.结合混沌映射和遗传算法提高水印的安全性和不可感知性;通过重复嵌入提高水印的鲁棒性.实验结果表明,本文方法具有较好的不可感知性以及对通常的图像处理具有很好的鲁棒性,并且优于同类方法.
Public watermarking remains one of the most challenging problems. In this paper a robust public watermarking for images based on chaos map and genetic algorithm is proposed. In the proposed method, some blocks of the image are randomly selected, and a pixel is randomly selected in each block. Then the watermark is embedded by modifying the relation between the value of the selected pixel and the mean of the block. Finally chaos map and genetic algorithm are introduced to improve the imperceptibility and security of the watermark, and the watermark is repeatedly embedded for improving its robustness. Experimental results show the proposed technique has good imperceptibility and high robustness under common image processing operations.
出处
《模式识别与人工智能》
EI
CSCD
北大核心
2002年第1期42-47,共6页
Pattern Recognition and Artificial Intelligence
基金
广东省自然科学基金(No:980257)
