水印

The watermark was embedded in vertexes which were associated with smaller acute angle of right triangle. It used the LSB method to embed watermark.

选择直角三角形中较小锐角所在的顶点作为水印的嵌入点，水印嵌入采用修改最不重要位的方法。

The watermark is processed by toral automorphism ,convolutional encding and interleaving before embedding,in order to improve the security and robustness.

水印在嵌入前进行Toral 自同构运算、卷积编码和交织，以提高水印的安全性和鲁棒性。

The digital watermarking technology based on spatial domain has characterics of computer briefness and bagger embedded capability, so it has been abroad studied in the first stage of watermarking technology. But gradually it has been replaced by watermarking technology based on frequency domain because of its disadvantage of robustness.

基于空间域的数字水印技术具有运算简单，嵌入容量大的特点，在水印技术发展之初得到广泛研究，但因其鲁棒性太差而逐渐被变换域方法所代替。

The image watermarking is permuted to reduce the relativity of original pixels, so the error bits of the extracted watermarking are dispersed as well. Therefore the resistance to crop attack is improved significantly.

对数字水印信号进行置乱分散了原始水印信号的相关性，在遭到剪切攻击时可以将错误码元尽可能分散，因此有效地提高了数字水印算法的抗剪切攻击性能。

The image watermarking is permuted to reduce the relativityof original pixels, so the error bits of the extracted watermarkingare dispersed as well. Therefore the resistance to crop attack isimproved significantly.

对数字水印信号进行置乱分散了原始水印信号的相关性，在遭到剪切攻击时可以将错误码元尽可能分散，因此有效地提高了数字水印算法的抗剪切攻击性能。

Simulation results show that watermarked images have good visual quality,the robust watermark can resist common image processing operations,and the semi-fragile watermark can detect and localize precisely the content tampers.

实验表明，嵌入水印后的图像视觉质量好，其中鲁棒水印能抵抗各种常规图像处理，半脆弱水印能准确地检测并定位内容篡改。

Shenzhen three woods science and technology Limited company executive director Liu displays introduced that the reflection membrane watermark technology constructs some special images through the high tech method and the craft in the reflection membrane interior, similar watermark, may also be called the person or household who refuses to move and bargains for unreasonably high compensation when the land is requisitioned for a construction project line and the three-dimensional watermark image technology, can meet the car license forgery-proof clear Yi Bian need well.

深圳市三森科技有限公司执行董事刘显章介绍，反光膜水印技术通过高科技手段和工艺在反光膜内部构造一些特殊的图像，类似水印，也可称为动感线和立体水印图像技术，能够很好地满足车牌防伪清晰易辨的需求。

In condition of big interval,we use mid-value quantization.

水印提取不需原图，属于盲水印提取，提取水印亦是二值图，效果直观。

To achieve high quality watermarked curve and robust watermark, the Bezier segments were used to reconstruct the watermarked curve.

为了得到视觉质量好的加水印曲线和鲁棒的水印，使用分段Bezier曲线来重构加水印曲线。

The digital image "Lena" often used by image processing workers and the school badge of Tianjin University of Science and Technology were chosen as watermark images. The robust digital watermarking algorithm based on DCT domain and MATLAB software were applied to do imbedding and extracting,and robustness detecting of the images.

选取基于DCT域的鲁棒水印算法、数字图像处理工作者常用的Lena图和天津科技大学校徽图像作为嵌入的二值水印图，利用MATLAB软件进行水印图像的嵌入、提取实验和鲁棒性检测实验。

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。