可见性

Generally, it possesses three basic characters of imperceptibility, robustness and security.

它一般具备三个基本特征，即不可见性、鲁棒性及安全性。

Quantity of experiment data shows that both of these two algorithms have good robustness, and the imperceptibility of watermark can be guaranteed at the same time.

实验结果表明，所提的两种算法都具有良好的鲁棒性，同时也很好地保证了水印的不可见性。

Owing to it of special, moer and more people consider it to be the way to improve the imperceptibility and robustness of the watermark system.

近年来，SVD在数字水印领域的应用越来越广泛，鉴于它的特殊性，越来越多的人把它作为提高水印系统不可见性和鲁棒性的主要手段。

The experimental results show that the imperceptibility and robustness of the last method can be guaranteed and its synthetic performance is better than those former methods.

实验结果表明结合小波变换和分形编码的水印算法具有良好的鲁棒性和不可见性，其综合性能优于前两种算法。

In order to test the imperceptibility and robustness of the three algorithms mentioned above, a lot of experiments are done. Experimental results demonstrate that our schemes are effective and useful.

实验结果标明，三种算法都具有良好的不可见性，对常见的图像处理操作具有较好的鲁棒性。

At last, some test results are provided which indicate this method has a good imperceptivity and robustness.

并给出了实验结果，试验结果表明该方法具有较好的不可见性和鲁棒性。

On the basic of odd-even judgement, this paper provides a new blind watermarking algorithm based on the nonuniform quantization. The test results show that this method also has a good imperceptivity and robustness.

在奇偶量化判决法的基础上，提出了一种新的基于块均值的非均匀量化数字水印技术，试验结果表明，该算法也具有不错的不可见性和鲁棒性。

Finally, this paper proves the algorithm reliable in robustness, imperceptivity and safety by analyzing and comparing the datum from many attack experiments.

最后，本文通过对多个"攻击实验"的数据进行分析和对比，证明我们的方法在鲁棒性、不可见性和安全性等方面是可以信赖的。

This finished the embedding process, and the test results show that this algorithm has certain imperceptivity and robustness. Because of the same embedding intensity, on one hand, it leads to the decline of the quality of the carrier image and influence the transparency and robustness of the watermark.

在此基础上，本文介绍了一种传统的基于小波变换的数字水印算法，这种算法将数字水印小波分解后的各个子带，嵌入到原始载体图像第三级小波子带中去，实现了水印的嵌入，试验结果显示该算法具有一定的不可见性和鲁棒性。

Experimental results show that the algorithm has a fine imperceptivity of watermark embedded and is strongly robust to attacks such as re-sampling, color dithering, smoothing, noise adding, and JPEG-compression.

实验结果表明：该算法具有很好的水印不可见性，对常见的图像处理攻击：如重采样、颜色抖动、平滑、加噪声和 JPEG 压缩等具有很强的稳健性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。