Furthermore, we briefly introduce some kinds of existed steganalysis methods and digital watermark attack methods.
此外，我们还简单介绍了几种信息隐藏分析方法和水印攻击方法。
The limit that space domain only be applied in LSB under gray image of digital watermark was changed. Then, experiment showed that the method have a better adaptability to normal attack.
在灰度图像中的数字水印中，空间域方法只能用在LSB（最低有效位）的局限性，同时，实验表明对常规攻击具有较好的识别能力。
In order to improve performance of resistance to the geometrical attack while keep invisible, a zero-watermark algorithm for digital image based on Fourier-Millin transforming is proposed.
为了提高抗几何攻击性能，同时保证不可见性，提出了一种结合傅立叶-梅林变换和零水印概念的图像水印算法。
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