This thesis mainly studies adaptive digital image watermarking algorithms based on human visual system (HVS).
本文主要研究基于人眼视觉特性的自适应图像水印算法。
Considering digital watermarking algorithms for document images, there are not many, lower robustness.
目前针对文档图像的数字水印算法并不是很多，并且都有鲁棒性较低的缺点。
Present watermarking algorithms are mainly proposed for still images and audio signals, few for video sequences.
当前提出的许多水印算法大部分都是基于静止图像和声音信号的，针对视频的水印算法还较少。
Two novel semi-fragile watermarking algorithms respectively based on JPEG and JPEG2000 are proposed in this paper.
本文提出了分别基于静止图像压缩标准JPEG和JPEG2000的两种新的半脆弱水印算法。
Research on digital watermarking algorithms for the 3d mesh model in the spatial domain and 3d shape model defined as a point set is made.
本论文分析了三维几何模型数字水印的基本原理和方法，研究了空域中的三维网格水印算法和三维点集模型的水印算法。
Though many DWT-based watermarking algorithms have been presented, few of them discuss the issue that which detail subband is the better choice to watermark.
目前有很多基于离散小波变换 （DWT）的水印算法，但很少讨论到水印嵌入子带的选择问题。
Experiment results show that the algorithm can solve the problems of watermarking collision and relieve the restriction of user number in multiple watermarking algorithms.
实验结果表明，该算法能有效解决多重数字水印中水印碰撞和用户数量受限问题。
The experimental results clearly indicate that this scheme is superior to most of the existing reversible watermarking algorithms and can embed large data with low distortion.
实验的结果表明，该算法优于现有的可逆水印算法，并可以在具有较小失真度的情况下嵌入大量的数据。
The experiment results show that watermarking algorithms based on block SVD are very robust to usual image manipulation attacks, especially the quantization watermarking algorithm.
实验结果证明，基于块奇异值分解的水印算法对常规的图像处理攻击具有很好的鲁棒性，尤其是其中的量化水印算法。
Currently, there are many DWT (Discrete wavelet Transform) based watermarking algorithms, but few of them discuss the issue in association with fractal image coding in wavelet domain.
目前有很多基于离散小波变换(DWT)的水印算法，但结合分形编码技术的很少。
An overview of already proposed watermarking algorithms for halftone images is given, based on the introduction of three kinds of halftone methods, ordered dithering, error diffusion and pattern.
介绍了有序抖动、误差扩散和模板法三种图像半色调方法，在此基础上，综述了现有的半色调图像水印算法，并对其中的四种方法进行了比较。
An overview of already proposed watermarking algorithms for halftone images is given, based on the introduction of three kinds of halftone methods, ordered dithering, error diffusion and pattern.
介绍了有序抖动、误差扩散和模板法三种图像半色调方法，在此基础上，综述了现有的半色调图像水印算法，并对其中的四种方法进行了比较。
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