查询词典 watermark

There are three advantages of our study. 1. We embedded the watermark by frequency domain and created unexpanded shares, which reduced the impact of pixel modification effectively.

本研究的优点有三个：一，我们的方法以频率域的方式嵌入浮水印，产生不扩展的分享影像，降低了像素值易受攻击的影响。

Digital watermark ; wavelet transform ; unobtrusiveness ; robustness

数字水印；小波变换；不可见性；鲁棒性

Taking use of the redundant data and randomicity of the digital products, the digital watermarking technology embeds the unperceivable but recognizable secret information--watermark containing the copyright information into the digital products, which can protect the copyright and integrality of the digital products.

数字水印技术利用数字作品中普遍存在的冗余数据与随机性，向数字作品中加入不易察觉但可以判定区分的秘密信息－水印，从而保护数字作品版权或完整性。

A great deal of experimental results are presented, proving that the digital watermark generated by the algorithm is unperceivable and shows great robustness to the common image processing like low-pass filtering, median filtering, Wiener filtering, nosing, cropping, rotation and JPEG loss compression, etc.

大量的实验结果表明，用本算法产生的数字水印能保证数字图像的不可见性，并且对常见图像处理均具有很好的鲁棒性，主要表现在低通滤波、中值滤波、维纳滤波、图像加噪，图像裁剪、图像旋转和有损JPEG压缩处理。

This dissertation is mainly concerning digital image watermarking problems. In Chapter 2, a detailed survey on digital image watermarking is presented. In Chapter 3, an optimal scheme is proposed to use Human Visual System model to compute masking function. It will be used to control the strength of watermark signal for optimal embedding. In Chapter 4, we propose a novel watermarking scheme based on lattice vector quantization.

本文讨论了数字图像水印及其在多媒体安全中的应用，主要围绕下列问题进行研究和创新： 1、优化的水印嵌入模型：本文对基于直接序列扩频技术的水印算法进行了改进，根据人类视觉系统感知模型，提出了优化的水印嵌入模型，在不可感知性条件的限制下，使水印的鲁棒性达到最高。

Some important transform coefficients of the original image are firstly mapped into the nearest neighboring lattice points by using lattice vector quantizer, then watermark signal is added to the lattice points.

基于格矢量量化的图像水印：本文提出了基于格矢量量化的多比特盲水印算法，不需要原始图象就可以实现水印信号的检测和译码。

Now you will be able to see the watermark in action.

现在，您将能看到水印的行动。

IEEE three digital watermark on the paper .........

IEEE的三篇关于数字水印的论文。。。。。。。。。

In this paper, a new method of effective digital image watermark is put forward.

品的版权保护。该文提出了一种有效的数字水印算法。

Here is an example of a good and bad watermark

这里是一个我已经完成的设计，它展示了被限制的色彩方案。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。