抗几何攻击的盲检测数字水印的难点是图像旋转角度的盲检测。
It's difficult to detect blindly the image rotation Angle in blind watermarking under geometry attack.
抗几何攻击的鲁棒图像水印算法研究是一项富有挑战性的工作。
In image watermarking, the watermark's vulnerability to geometric attacks has long been a difficult problem.
结合计算全息技术，提出一种新颖的抗几何攻击的鲁棒零水印算法。
A novel geometric robust zero-watermarking scheme, which USES Computer Generated Holograms (CGHs) as the watermarks, is presented.
为了增强水印的抗几何攻击能力，本文提出了一种基于图像内容的水印方案。
In this paper, the attacks on image are geometrical attacks, including Flipping, Scale and Rotation.
为了增强水印的抗几何攻击能力，本文提出了一种基于图像内容的水印方案。
In this paper we proposed a robust digital image watermarking based on image content.
算法有较强的抗几何攻击能力，同时对剪切、压缩、滤波等攻击也有较强的鲁棒性。
The algorithm has very strong robustness for some geometrical attacks, compression, filtering and cropping.
与传统的零水印算法及数字全息水印算法相比，本文算法具有更好的抗几何攻击性能。
Compared with traditional zero-watermarking methods and digital hologram watermarking methods, the suggested watermarking scheme provides better performance for resisting geometric attacks.
在水印算法中用奇异值分解可以提高图像的抗几何失真性，但它对椒盐、高斯、滤波等攻击的抵抗能力却很弱。
Use singular value decomposition (SVD) in the watermark algorithm may enhance the anti-geometry distortion of the image, but it is very weak to some attacks such as salt, gauss, filter and etc.
在水印算法中用奇异值分解可以提高图像的抗几何失真性，但它对椒盐、高斯、滤波等攻击的抵抗能力却很弱。
Use singular value decomposition (SVD) in the watermark algorithm may enhance the anti-geometry distortion of the image, but it is very weak to some attacks such as salt, gauss, filter and etc.
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