Watermark attacks and relevant remedies against those attacks are also discussed.
我们还讨论了数字水印应用中常见的攻击以及相应的对策。
Dynamic data analyses are difficult, so this kind of watermark is more robust to watermark attacks.
因为分析动态数据的困难性，这种动态水印对水印攻击的抵抗能力较强。
Experimental results show that the watermark is imperceptible and the algorithm is robust to many attacks, such as MP3 compression, noise addition, requantization, low pass filtering and so on.
实验结果表明，水印系统对MP3压缩、噪声干扰、重量化、低通滤波攻击有一定的鲁棒性。
Experimental results show that this watermark detector has not only the good robustness to Gaussian noise, but also the very strong resistant ability to translation and rotation attacks.
实验结果表明，该水印检测器不仅对旋转、平移攻击有很强的抵抗能力，而且对随机高斯噪声也具有良好的鲁棒性。
Characters and common attacks of transform domain digital watermark system were analyzed on emphasis. And we give some corresponding countermeasures.
着重分析了变换域数字水印系统的特征及常见攻击，给出了一些相应的对策。
In the third chapter, we first detail some watermarking attacks including watermark removal attacks, cryptographic attacks and protocol attacks.
在第三章中，我们首先详细介绍了水印去除攻击、密钥攻击及协议攻击。
In order to differentiate incidental attacks and malicious attacks, semi-fragile watermark must be robust against content-protection image processing.
为了能够区分偶然攻击与恶意篡改，半脆弱水印需要对一般的内容保护图像操作有一定的鲁棒性。
Because the watermark is embedded redundantly in the whole band of the model, the approach is robust against various attacks.
由于水印被冗余地嵌入在模型的整个频带上，该算法可有效地抵抗多种攻击。
A new digital watermark detector is proposed in this paper, which is based on attacks characteristics complementary between different image processings.
这里基于图像处理的攻击特性的互补提出了一种新的数字水印相关检测器。
Compared to the original algorithm, the security and the ability of resisting some attacks such as cutting and JPEG compression were obviously enhanced in the watermark system.
改进后的算法与改进前相比较，水印系统的安全性得到了提高，且对抗剪切、JPEG压缩等攻击的能力明显增强。
The experimental results show that the embedded watermark is robust against the attacks such as frame drop, swap and collusion.
对于丢帧、帧重组以及共谋攻击有很强的鲁棒性。
Furthermore, to enhance robustness, a random permutation of the watermark is used to defeat the attacks of signal processing, such as image crops.
另外，为了增强鲁棒性可对水印数据进行随机置乱操作以抵抗剪切等信号处理操作。
The image watermark scheme based on Scale Invariant feature Transform (SIFT) feature is proposed for resisting geometric attacks.
提出一种利用尺度不变特征变换(SIFT)特征点实现对抗几何攻击的水印方案。
Papers completed the watermark embedded in it after the attacks of the anti-testing, to determine how to tamper with the regional and tampering with the type of semi-fragile watermarking method.
论文在完成水印的嵌入之后对它的抗攻击性进行检测，讲述了如何确定篡改区域和篡改类型的半易损水印的方法。
Use singular value decomposition (SVD) in the watermark algorithm may enhance the anti-geometry distortion of the image, but it is very weak to some attacks such as salt, gauss, filter and etc.
在水印算法中用奇异值分解可以提高图像的抗几何失真性，但它对椒盐、高斯、滤波等攻击的抵抗能力却很弱。
During the watermark detection, the image suffered from geometric attacks is firstly corrected.
在水印检测时，先对遭受几何攻击的含水印图像进行校正。
When the image (host information) is added a noise, gaussian low-pass filter, shear attacks, the mandible, extract the original watermark image watermark image and the similarity is very satisfactory;
当图像（宿主信息）遭到加噪、高斯低通滤波、剪切等攻击后，其可视度、提取的水印图像与原始水印图像的类似度都是十分令人称心的；
The original image is not needed during the watermark detecting process. The experimental results show that the algorithm has a better transparency and can resist various attacks. Especially the...
根据本算法的实验结果，该算法具有较好的透明性，对各种攻击有较强的顽健性，尤其是增强了小波域水印在面临裁剪攻击和联合攻击时的顽健性。
Fragile watermark is very sensitive to these attacks.
而易损水印对上述攻击则具有很强的敏感性。
It might fail to detect watermarking now that geometric attacks perform on a watermarked image and destroy the synchronization of the watermark signals embedded in the image.
几何攻击作用在加载有水印的图像上，水印同步信息被破坏，导致水印检测失败。
Experimental results show that the robust watermark can provide high robustness to conventional attacks, and malicious tampering, it has good accuracy of tamper localization.
实验结果表明，该算法能有效抵抗各种常规攻击，区分常规攻击与恶意篡改，并能对恶意篡改进行定位。
Secondly, a digital watermark algorithm based on spatial characteristic has been discussed for the weakness of the first algorithm in resisting attacks of traditional map operations.
其次，针对基于属性特征的无损数字水印算法在抵抗常见的地图编辑操作时鲁棒性能较弱的不足，提出了基于空间特征的数字矢量地图水印算法。
Secondly, a digital watermark algorithm based on spatial characteristic has been discussed for the weakness of the first algorithm in resisting attacks of traditional map operations.
其次，针对基于属性特征的无损数字水印算法在抵抗常见的地图编辑操作时鲁棒性能较弱的不足，提出了基于空间特征的数字矢量地图水印算法。
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