摘要： 提出了一种水印图像矫正算法。该算法利用水印图像几何变换前后的Cartesian矩计算出水印图像缩放的尺度因子、旋转角度和平移参数，实现了对水印图像几何失真的快速矫正，不但可以校正水印图像的旋转失真、缩放失真和平移失真，还能有效地矫正联合失真。实验表明，该算法矫正精度高、性能稳定、计算量小，可以快速准确地矫正水印图像的高强度几何失真和联合失真。

关键词: Cartesian矩矫正, 水印图像, 联合失真, 几何失真

Abstract: A geometric distortion correction algorithm for watermark image is proposed. In order to correct geometric distortions, the algorithm estimates the parameter of translation, rotation and scaling transform with Cartesian moment of the original image and the geometric distorted image. The algorithm can correct combine distortion as well as rotation distortion, scale distortion and translation distortion. Experiments demonstrate that the scheme is of sound correctional precision, stable performance, low complexity and can efficiently correct geometric distortions of high intensity.

Key words: Cartesian moment correction, Watermark image, Combine distortion, Geometric distortion

中图分类号: 

• TP301.6