The data itself is messy - it comes as a PDF, which is watermarked and locked, to make copying as difficult as possible.
数据本身是混乱的，它以一份PDF呈现，有水印并且被锁上，要复制相当的困难。
The extension provides a built-in method for converting video files, but they will end up watermarked, so just download the files in MP4 if possible, or FLV if not.
这个扩展内置了视频格式转换的功能，但最终文件有水印，所以尽量下载MP4文件，没有的话再考虑FLV文件。
Experiments show that the watermarked image is invisible and robust to a lot of common image manipulations.
实验结果表明，算法不仅具有良好的不可见性，并且对常见的图像处理操作具有较好的鲁棒性。
Experimental results show that the proposed technique is robust to common digital image processing operations and the quality of the watermarked image is guaranteed.
仿真实验表明，该算法对常见的一些数字图像处理操作具有较强的鲁棒性，同时能保证含水印图像的质量。
These movies should not be altered or watermarked in anyway.
影片不得以任何方式修改原始画面或加盖水印。
Compared with the original video sequences before watermark, PSNR of watermarked frames is reduced slightly.
与嵌入水印前的原视频图像相比，嵌入水印后的视频图像信噪比损失很小。
The experiments with common image-processing operation on the watermarked image shows that the algorithm is quite robust.
对嵌水印图像作典型图像处理试验，表明该算法具有很好的鲁棒性。
Moreover we analyze its robustness when exhaustive search and subtraction attack are inflicted on the watermarked content.
此外还分析了当对嵌有水印的作品进行穷举搜索攻击和减法攻击时算法的鲁棒性。
It analyses the influence of user number and embedding depth on the quality of watermarked images and extracted watermarks.
分析了用户数量和嵌入深度对含印图像质量和提取水印质量的影响。
Watermark detection is implemented by comparing the new difference of mean values of watermarked image blocks with the threshold values.
在水印提取时，计算分块的新的均差值并与所设门限进行比较，从而检测嵌入的原始水印值。
Quality of the watermarked data is an important metric for measuring the invisibility of the watermark and the validity of the marked data.
含水印数据的质量评价是衡量水印嵌入隐蔽性和数据可用性的重要指标。
The watermark can be retrieved by using either optical or digital Fourier transform on halftone images containing the watermarked information.
水印的提取过程只需对含有水印信息的半色调图像进行光学或数字的傅里叶变换即可完成。
If the position of the feature points is stored in a database or in the file head of the watermarked image, the original image is not necessary for watermark detection.
将特征点位置存放在数据库或图像文件头中，提取时无需原始图像。
The tampered area of the watermarked image could be reflected in the watermarking difference map and the tampered intensity could be reflected in singular values difference.
认证时通过水印差值定位图像被篡改的位置，通过奇异值差值反映被篡改区域的篡改强度。
Furthermore, this algorithm, adapted to the local image characteristics, can control the robustness of embedded watermark and improve visual quality of the watermarked video.
同时这种算法可以根据图像局部特征控制水印鲁棒性，改善画质。
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。
From the experiment results, it indicates that, after the watermarked MPEG-4 video suffer filtering, rotation, scaling and transcoding, the watermark possesses good imperceptibility and robustness.
实验表明，算法在MPEG - 4水印视频经过滤波、旋转、尺度变化、代码转换编码等处理后，水印在可见性和鲁棒性等方面取得了良好的效果。
From the experiment results, it indicates that, after the watermarked MPEG-4 video suffer filtering, rotation, scaling and transcoding, the watermark possesses good imperceptibility and robustness.
实验表明，算法在MPEG - 4水印视频经过滤波、旋转、尺度变化、代码转换编码等处理后，水印在可见性和鲁棒性等方面取得了良好的效果。
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