水印

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 muli-authentication watermarking algorithm has been proposed, and two novel block hierarchy-dividing models have been developed to solve the problem of unselective localization accuracy in traditional image block-dividing watermarking technology.

提出了用于多重图像认证的水印算法，通过建立新的图像块分级模型，解决了传统图像分块水印技术中定位精度单一化的问题。

In this paper, the development of audio watermark is first introduced.

本文介绍了当前音频数字水印技术的发展情况，总结了音频数字水印的分类。

The capacity of watermark is very important to the application of digital watermark.

水印信息容量对数字水印的实际应用具有重要的意义。

What is important to digital watermark is how to improve its robustness.

增强数字水印的鲁棒性是数字水印问题的关键。

On this basis, this paper introduces a kind of traditional digital watermarking algorithm based on the wavelet transform.

本文首先简要介绍了数字水印的基本概念、产生的背景，以及数字水印的发展历史、现状和面临的主要问题。

The theoretical basis is still weak, especially in the aspects of comparisons, testing and evaluation for the watermarking system.

尽管数字水印技术在近几年里得到了飞速发展，但它仍然是个未成熟的研究领域，还有许多问题有待解决，其理论基础依然薄弱，尤其是在对水印系统进行公正的比较、测试和评价方面还只是局限于经验性的判断与评价。

Dandy roll: A cylinder of wire gauze in the paper making machine that comes into contact with the paper while it is still wet .

水印辘：在造成纸机上的金属纲圆筒，它卢湿纸接触，按照需求压上水印水纹。

According to the digital image watermarking technology,two embedding algorithms based on DWT and corresponsive distilling algorithms are studied.

针对数字图像水印技术，比较系统地研究了基于DWT域的两种数字图像水印嵌入算法及对应的提取算法。

At present, the ability of counteracting geometric attacks hasnt completely achieved the request of application.

目前数字水印算法的抗攻击能力还不能完全达到应用的要求，几何变换攻击被认为是提高水印算法鲁棒性的关键问题。

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。