third_party/akaze/TEvolution.h

/**
 * @file TEvolution.h
 * @brief Header file with the declaration of the TEvolution struct
 * @date Jun 02, 2014
 * @author Pablo F. Alcantarilla
 */

#ifndef __OPENCV_FEATURES_2D_TEVOLUTION_H__
#define __OPENCV_FEATURES_2D_TEVOLUTION_H__

#include <opencv2/core.hpp>

namespace cv {

/* ************************************************************************* */
/// KAZE/A-KAZE nonlinear diffusion filtering evolution
struct TEvolutionV2 {
  TEvolutionV2() {
    etime = 0.0f;
    esigma = 0.0f;
    octave = 0;
    sublevel = 0;
    sigma_size = 0;
    octave_ratio = 1.0f;
  }

  Mat Lx, Ly;         ///< First order spatial derivatives
  Mat Lxx, Lxy, Lyy;  ///< Second order spatial derivatives
  Mat Lt;             ///< Evolution image
  Mat Lsmooth;        ///< Smoothed image
  Mat Ldet;           ///< Detector response

  Mat DxKx, DxKy;  ///< Derivative kernels (kx and ky) of xorder = 1
  Mat DyKx, DyKy;  ///< Derivative kernels (kx and ky) of yorder = 1

  float etime;     ///< Evolution time
  float esigma;    ///< Evolution sigma. For linear diffusion t = sigma^2 / 2
  int octave;      ///< Image octave
  int sublevel;    ///< Image sublevel in each octave
  int sigma_size;  ///< Scaling factor of esigma that is round(esigma *
                   ///< derivative_factor / power)
  int border;      ///< Width of border where descriptors cannot be computed
  float octave_ratio;  ///< Scaling ratio of this octave. ratio = 2^octave
};

}  // namespace cv

#endif