摘要
本文结合传统的密码学和小波变换域数字水印技术,在水印信息被嵌入到载体作品之前,根据密码学原理将水印进行加密,然后再进行嵌入,充分考虑了小波变换的频域特性与人类视觉系统的很好匹配。在前人的研究基础上,利用图像的小波变换域的JND模型提出了一种基于混沌映射的在图像的小波变换域嵌入数字水印的算法。实验证明,用该算法嵌入的水印图像不仅具有很好的不可感知性,同时从小波变换域提取出的水印密文也具有很强的抗破译性。
On basis of previous research, this article proposes a digital watermarking algorithm of wavelet transform domain based on chaotic map using JND model,combined the traditional cryptography with digital watermarking technology of wavelet transform domain. Before the watermark information is embedded into the work, according to principles of cryptography, encrypt the watermark and then embed. Experimental results show that a watermark image embedded with the algorithm is not only good to be unperceived, but also the watermark ciphertext extracted from the wavelet transform domain has strong anti-deciphering.
出处
《电子测试》
2011年第2期32-36,55,共6页
Electronic Test
关键词
混沌映射
小波变换
数字水印
Chaotic Map
Wavelet Transform
Digital Watermarking
