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。
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。
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。
Using some criteria for 3d mesh watermarking, the robustness of three mesh watermarking algorithms is evaluated, and their range performance are also shown.
利用三维网格水印健壮性评估的几个衡量标准，测评了所提出的三种三维网格数字水印算法的适用范围和效能。
This paper discusses some basic characters of asymmetric watermark, and review some asymmetric watermarking algorithms and asymmetric watermarking protocols.
文章分析了非对称水印的基本特征，并对一些非对称方案，包括非对称水印算法和非对称水印协议进行了讨论。
The results show that two kinds of image watermarking algorithms do not all have good visibility of the common image processing operations are highly robust.
结果表明两种图像水印算法均具有很好的不可见性，对常见的图像处理操作具有很强的鲁棒性。
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。
This paper presents a visible watermarking algorithm for color images copyright notification on the basis of analyzing color images and related algorithms.
在对彩色图像及相关算法进行分析的基础上，提出了一种适用于彩色图像版权通知的可见数字水印算法。
It would be one of the unremitting research works to seek watermarking methods for halftoned images that could resist as many attack algorithms as possible.
寻找对尽可能多的攻击算法有免疫性的半色调图像的数字水印方法将持续成为研究的主要方向之一。
A new method that digital watermarking information was embedded in numerical attributes Least Significant Bit (LSB) was put forward in view of the existing watermark algorithms insufficiency.
针对现有水印算法的不足，提出了在数值型属性最低有效位(LSB)嵌入水印信息的一种新方法。
But more research of the digital watermarking focus on algorithms and theoretical basis, while ignoring the design of watermark application protocol and implementation.
但是目前对于数字水印的研究多集中在算法和理论基础方面，而忽视了水印的应用协议和实施标准设计和制定。
Still image digital watermarking and information embedding algorithms are studied in this thesis.
本文研究了静态图像的数字水印和信息嵌入问题。
Comparison with the DCT watermarking algorithm, which is one of the popular algorithms, demonstrates the superiority of the present algorithm.
与主流算法之一的DCT水印算法比较，验证了该算法的优越性。
After studying and analyzing the disadvantages of the previous algorithms in digital watermarking, we focus our work on the researching and implementation of the combining watermarking technology.
在学习和分析了已有的水印算法后，我们将重点放在研究复合水印嵌入技术的实现上。
The main algorithms and their merits and shortcomings of video watermarking technology are introduced here. And then induced the key questions which a perfect image watermarking algorithm must solve.
介绍了图像水印技术目前所采用的主要算法及其各自的优缺点，归纳了成功的图象水印方案必须解决的关键问题。
Digital watermarking is a new technique for digital multimedia copyright protection, the differences of the algorithms make the robustness and the imperceptibility of this technique very different.
数字水印是近年来出现的一种新的数字多媒体产品版权保护技术，用于嵌入水印的算法的不同使得该技术的不可见性，鲁棒性等特性大相径庭。
In recent years, a set of watermarking protocols with new mechanisms and algorithms have been proposed by scholars all over the world.
近年来，国内外许多学者提出了一系列新的数字水印协议。
The third method is effective integrate the former two algorithms, which proposed dual watermarking algorithm for digital image authentication.
第三种算法是将前两种空域和变换域算法进行有效融合，从而提出了双重多功能性水印数字图像认证算法。
In view of the unique characteristics of document images, many algorithms for digital image watermarking can not be applicable for document images.
而且鉴于文档图像自身的特点，许多数字图像水印算法对文档图像并不适用。
In view of the unique characteristics of document images, many algorithms for digital image watermarking can not be applicable for document images.
而且鉴于文档图像自身的特点，许多数字图像水印算法对文档图像并不适用。
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