internal static extern void cvLogPolar(__CvArrPtr src, __CvArrPtr dst, __CvPoint2D32f center, double M, int flags /* CV_DEFAULT(CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS) */);
internal static extern __CvMatPtr cv2DRotationMatrix(__CvPoint2D32f center, double angle, double scale, __CvMatPtr map_matrix);