摘要
提出一种基于改进的汉明译码算法的小波域图像数字水印新算法.它利用小波域的人类视觉系统(HVS)的特性,将水印嵌入到宿主图像经小波分解的中高频子图像中,提取水印时,根据改进的汉明码译码算法与纠错原理,以及数字水印自身特点,实现最大概率地纠正两位错误.实验证明该算法能有效地提高水印信号提取的准确度.
A new image digital watermarking algorithm based on improving decoding algorithm for a Hamming code in the wavelet domain is proposed . According to the correct error principle of Hamming code and the characteristics of digital watermark, pass to improve the decoding algorithm for a Hamming code, making its have more probably the rate rectify two false abilities. By exploiting the visual marking and texture characteristics of Human Visual System(HVS) in the wavelet domain, watermark was embedded into the wavelet domain and intermediate frequency. A flood of experiment proof that the watermarks are invisible and robust again noise and commonly used image-processing methods such as Guassian noise , JPEG, clipping procession etc.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
2004年第4期24-27,共4页
Journal of Fujian Normal University：Natural Science Edition
基金
:福建省自然科学基金资助项目(A0210016)
福建省教育厅基金资助项目(JA03028)
关键词
数字水印
汉明码
小波
digital watermarking
Hamming code
wavelet
