摘要
针对数字水印问题,研究了在小波变换域中对数字水印进行嵌入和提取的方法。该算法结合激光的菲涅耳衍射和混沌置乱技术对水印图像进行处理,在原始图像的小波变换域进行水印嵌入。激光波长、衍射距离和混沌序列初始值都是算法密钥。仿真结果表明该算法满足数字水印的不可见性、鲁棒性和安全性等特征。
Focus on the problem of digital watermarking,proposed a new digital watermarking algorithm based on transformation domain. The algorithm combines laser Fresnel diffraction and chaotic scrambling techniques to process the watermark image. The watermark embedded into original digital image in wavelet transform domain. The wavelength,diffraction distance and the initial value of chaotic sequence are the key of algorithm. The simulation results show that the algorithm can satisfy the imperceptibility,robustness and security features of digital watermark.
出处
《激光杂志》
北大核心
2015年第6期126-129,共4页
Laser Journal
基金
国家自然科学基金(61173184)
重庆市教委科研项目(KJ1400911)
关键词
混沌置乱
菲涅耳衍射
小波变换
数字水印
Chaotic scrambling
Fresnel diffraction
Wavelet transform
Digital watermarking
