摘要
以数字图像水印为研究对象,在介绍典型的最低有效位LSB空间域图像水印算法优缺点的基础上,对DFT、DCT、DWT、Ridgelet变换域数字图像水印技术进行了研究,然后重点分析了Contourlet变换新技术,Contourlet变换通过各向异性基实现了图像的多尺度多方向性分解,更能捕获图像的曲线奇异性和匹配人类视觉特性,这一新技术在数字图像水印领域有广阔地应用前景,最后指出了数字水印的发展方向。
The objective of this research is digital image watermarking. Based on the introduction of the advantages and disadvantages of the typical LSB （Least Significant Bit） spaltial domain image watermarking algorithm, the study on digital image watermarking technology, in transformation domain of DFT, DCT, DWT and Ridgelet is carried out. The new Contourlet transformation technology is emphatically analyzed, which realizes the image multi-scale and direction decomposition by using the anisotropic basis, thus it is more easy to capture the curve singularity and to match the HVS properties. The new technology has broad application prospect in the digital image watermarking field. Finally, this paper points out the development of digital watermarking.
出处
《通信技术》
2008年第12期334-336,339,共4页
Communications Technology
关键词
数字水印
离散小波变换
脊波变换
轮廓波变换
Digital Watermarking
Discrete wavelet transformation
Ridgelet transformation
Contour wavelettransform
