watermarks

The Study of Information Protection and Digital Watermark and Its Development

信息隐藏与数字水印的研究及发展

Study on Digital Image Watermark Technology and Its Algorithm

数字图像水印技术及其算法的研究

The improved binary operation methods was utilized, and watermarks are embedded to the low frequency coefficients of deep wavelet domain.

并利用改正的二值运算方法将水印嵌入到图像深层小波域的低频子图中。

Experimental results show that the visually identical and the watermarks also successfully survive after many attacks.

实验结果表明,算法在满足一定的不可感知性的前提下,能够有效地抵抗多种高强度的攻击.

Dates, photo details and other EXIF information can be added as watermarks.

日期, 照片的细节和其他EXIF信息,可以增加一条,作为水印.

For many digital image watermarks, geometric distortions are their weakness.

几何变换攻击一直是许多数字图像水印的薄弱环节.

Watermarks: Learn to make'em. They are invaluable for a mail scam.

水印: 学会制作它们. 在邮件的欺骗中这个是无价的.

Dynamic Graph Watermark ( DGW) is one of the best dynamic software watermarks. The idea of DGW is encoding the watermark into topology graph in order to be immune to semantics preserving attack.

动态图软件水印技术是目前最好的动态软件水印技术之一，核心思想是将水印信息编码成拓扑图结构，从而使对拓扑图进行变换的保持语义攻击难以实现。

Therefore, the embedded watermarks with this double chaotic map based watermarking algorithm are not only invisible, robust and safe, but the algorithm is also very exercisable.

因此，这种基于双混沌映射的水印算法，不仅使嵌入水印具有良好的隐蔽性、鲁棒性和安全性，而且使算法具有很好的现实可操作性。

It can authenticate the possession of originality data that have embedded a secretinformation-watermarks.

它通过在原始数据中嵌入秘密信息──水印(watermarks)来证实该数据的所有权归属.

Then, the watermarks are embedded into the wavelet coefficients by using the improved binary operation methods.

然后引用修正的二值运算方法将变换后的水印信息嵌入到图像的小波变换域中；

Watermarks are designed for printed documents, and they aren't visible in normal view or web layout view.

水印是针对打印文档设计的，因此在普通视图或web版式视图中看不到它们。

According to zero-watermarking, a zero-embedding algorithm for multiple watermarks was proposed based on wavelet and chaos.

摘要根据零水印概念, 提出一种基于小波和混沌的多重水印零嵌入算法.

Digital watermarks have also find its usage in secret communication communication counterwork.

数字水印技术在隐蔽通信及其对抗等领域中也具有非常重要的用途.

A multiple based number system is proposed to skillfully convert the watermarks information into values to be embedded in the chosen wavelet coefficients of the owner image.

多数字基整数巧妙地将水印小波系数的信息转换为修改一组宿主图像小波系数的值.文中理论估计了该算法嵌入水印的容量，并分析了嵌入多重数字水印的可能性。

The HVS model is based on the computation of the noise visibility function ( NVF) and embed at the texture and edge region stronger embedded watermarks.

模型基于噪声可见性函数（NVF）的计算来决定水印嵌入强度，使水印更多的嵌入到图像的纹理和边缘区域。

The watermarks are robust against LSB and crop attack.

可以抵抗LSB攻击和剪切攻击.

In a lagoon, watermarks on mangrove roots inscribe a history of depth changes.

一个礁湖中红树林的根部记下了水位变化的历史.

It uses identity to create the watermarks, which are embedded into the opaque predicates after they are encoded. The Java program is obfuscated by taking the opaque predicates with the watermarks as the threads of the Java program, and the watermark is verified by zero-knowledge proof.

该方案把用身份标识产生的数字水印信息编码后嵌入到混淆的勒让德符号构造的不透明谓词中，将有水印的不透明谓词作为Java程序的线程来混淆Java程序，用零知识证明验证水印信息。

Following the synchronous valleys, the additive synchronous approach was adopted to locate the usable watermarks.

紧随着各峡谷的是外同步技术,用于确定可用水印.

Security paper: Paper incorporating features , such as watermarks , etc, which make counterfeiting difficult.

保密纸: 有着难以仿制的特征, 如水印等的纸张.

Experiments show that this system has high performance in resist attacks. ( 4) Taking into account the features of human visual system, a watermarking scheme in DWT domain is designed to make a compromise between the invisibility and the robustness of watermarks.

该系统的抗攻击能力很强。4.充分利用人眼视觉特性来平衡水印的鲁棒性和不可见性，本文研制了一种小波域的数字水印算法。

The original images and watermarks are transformed into a multi-frequent image to be embedded in watermark.

这种算法充分利用小波变换的特点,把原始图象和水印分解成多频段的图象来嵌入水印.

Comparing with the common document watermarking methods, which usually changing the line space or word space to embed watermarks, this algorithm can hide more information, and remain unconverted to geometric distortions.

与常规的通过调整行间距和调整字间距的文档结构微调法相比，该方法嵌入水印的容量大，抗剪切等几何攻击能力强。

Artists and other creative professionals may consider using their work samples as watermarks.

艺术家或者其他有创意的专业人员可以尝试使用他们的作品作为水印图案.

As the detection key in symmetric watermarking scheme can be used to forge or remove watermarks from digital works, it is required that the detection key be secret in watermark detection procedures.

对称水印方案的水印检测密钥可以被用来伪造和移去水印，因此要求它在检测过程中也是保密的。

We are very concerned about this [ sort of leakage], says Mr Park of Samsung. Now we are putting watermarks on our drawings and we always print them on paper, not on CD.

我们非常关注这种（泄漏）事件，三星的Park表示，现在我们在图纸上加水印，而且我们的图纸往往印在纸上，而不是刻在光碟上。

We should go to the studio and there see the anguish18, wrecked19 early versions and watermarks on the paper where the artist broke down and wept.

我们应该去那些工作室，看看那些早期的痛苦，失败之作，以及艺术家崩溃地哭泣时落在纸上的泪痕。

The experimental results indicate the watermarks are transparent and robust against some kinds of process such as JPEG compression, noise, cut out, lighteness and contrast adjustment and so on.

实验结果表明，该水印系统具有良好的透明性，对JPEG有损压缩、噪声、裁剪、锐化、亮度和对比度调整等图像处理有较好的鲁棒性。

Development of Digital Picture Watermarks System for the Printing and Packaging Enterprises

印刷包装企业中数字图像水印系统的研发