... 是激光增益介质在磁场作用下产生的法拉第旋光效应的旋光角度,ε 是环形光路的非共面导致的图像旋转角(image rotation angle), r 是反射镜的相位延迟, c 是光速, L 是环形光路的光程。
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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.
针对这一问题,本文提出了一种带旋转角度估算的自适应图像配准方法。
Currently available image registration methods are not efficient for large rotation Angle image.
然后以直线特征定义了参考图像和待配准图像的相似性度量,以此度量估计旋转角度,找出直线组的对应关系;
Then define similar measure between the two images by light characteristic, and use this measure to estimate rotated angle and find out corresponding light groups.
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