摘要
分析了双重置乱技术,提出了基于伪随机排序和Arnold变换相结合的水印生成方法.原始水印为有意义二值图像,伪随机排序置乱图像,将初始状态作为密钥;再进行Arnold变换,置乱次数可作为另一密钥.将处理后的水印嵌入到载体图像的DCT域数字中.实验结果表明,该方法生成的水印具有极高的安全性.
In this paper, a digital image watermarking based on Arnold transform and pseudo-random permutation is proposed. The digital watermark which is a binary image is first transformed into a worthless image using pseudo-random permutation and a secret key is used to express the initial value. The image then is transformed by using Arnold transform and an another secret key is used to control the scrambling numbers. The secret image is embedded into the DCT coefficients of the original image. Experimental results show that this algorithm can generate a digital watermark with the high security.
出处
《大庆石油学院学报》
CAS
北大核心
2005年第4期133-135,共3页
Journal of Daqing Petroleum Institute
关键词
数字水印
ARNOLD变换
伪随机序列
离散余弦变换
digital watermark
Arnold transform
pseudo-random sequence
discrete cosine transform(DCT)
作者简介
吕秀丽（1971-），女，硕士，讲师．现从事信号处理及信息隐藏方面的研究
