查询词典 watermark

Then, according to research on nonisotropic transformation in geometric attack, this *** further spreads the application field of scale-space theory in watermark design and proposes an algorithm against geometric attack grounded on affine invariant feature point.

然后，通过对几何攻击中的非同向性变换的研讨，入一步扩铺尺度空间理论在水印设计中的应用，提出一种基于仿射不变特性点的抗几何攻击算法。

Experimental results show that the watermark is perceptually invisible and the proposed scheme is robust to various image processing operations.

实验结果表明水印是不可感知的，并且对于各种图像处理操作是鲁棒的。

It attempts to identify the true owner by hiding perceptually invisible information inside the digital data. In this thesis, for the purpose of protecting the Intellectual Property Rights of digital images, a Discrete Wavelet Transform based digital watermark algorithm is described.

在这个背景下，如何防止具有版权的数字数据在未经允许的情况下，被非法的使用或是传播，这就提出新的研究的课题：就是如何运用现有的理论和技术，更好的解决数字产品所有者的合法权益的保护问题。

For 3D model copyright protection, we propose a robust watermarking algorithm for 3D models which embeds watermark information by perturbing the distance between the vertices of the model to the centre of the model.

针对三维模型版权保护应用，我们提出了一种稳健的三维模型水印算法，它通过修改从模型中心到顶点的向量长度来嵌入水印。

We adjust the strength of embedded watermark in according to the visual model in the ridgelet domain.

论文根据小脊变换域中的视觉模型，按照小脊变换域中计算出水印嵌入强度的权重，用扩频的方法来嵌入水印信息。

The original video is spitted into a series of frame groups,for each frame in the group,the points of contour shape are described by MPEG-7,and taking advantage of hash function to calculate the keys between those points in the 1D- DFT transform domain and the watermark signals.

在该算法中，原始视频数据被分割成等帧数的视频组，利用MPEG-7的轮廓编码计算每个视频帧的主要物体轮廓坐标点集合；接着通过傅立叶变换得到该帧轮廓点形状不变量，利用哈希的方法计算水印信号并将这些不变量的有效值作为密钥之一；再对整个视频组的轮廓点进行傅立叶变换，得到其时间轴上的有效不变域，将水印信号嵌入在这个不变域的中频部分以确保了水印的鲁棒性。

This method does not require any training and can be widely used on steganography and watermark of JPEG images from various sources.

该算法无需任何的训练过程，对JPEG图像的各种数字图像隐藏和水印具有广泛的效果。

First, using chaotic sequences, an algorithm of embedding watermark in low frequency subband of wavelet transform image is designed.

第一，利用混沌序列的优良性能，提出了一种在小波图像低频系数中嵌入水印及检测的算法。

Digital watermark is embedded into the middle frequency subband images of the original image in discrete wavelet transformation domain.

研究基于小波变换域的数字水印的嵌入对策和检测方法，实现了数字水印自适应地嵌入到原始图像离散小波变换域的中频子带图像中。

He can start by selecting, for example, a paperboard which is more difficult to copy because it employs the watermark technique (see TJI 2/2002) and then add other features to the pack itself, such as for instance a micro-coding system.

他可以从精选入手，比如，纸板由于其运用了水印技术（参看TJI 2/2002）在结合包装盒本身的一些其他特性像微码设计系统，会变得更难伪造。

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。