【Key words】 digital watermarking； resist geometric attacks； self-recognition watermark pattern；
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Also it has capability of checking tamper, it can orient 8*8 block in the spatial domain.2. A Robust to Geometric Attack’s Watermarking Based on Edge Information and Affine Model.
2.一种基于边信息及仿射模型的抗几何攻击的数字水印算法。
参考来源 - 半脆弱及抗几何攻击数字水印方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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.
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