ImageGradients.hpp

#ifndef _HOMOGRAPHY_IMAGEGRADIENTS_HPP_
#define _HOMOGRAPHY_IMAGEGRADIENTS_HPP_

#include <image/Image.hpp>

namespace jafar {

namespace homography {

class ImageGradients {
  public:
    ImageGradients(const jafar::image::Image& source, double derivationSigma = 1.0);
    inline void sampleGx(jafar::image::Image& dst, float x, float y) const
    {
      cvGetRectSubPix(m_imggx, dst, cvPoint2D32f(x,y));
    }
    inline void sampleGy(jafar::image::Image& dst, float x, float y) const
    {
      cvGetRectSubPix(m_imggy, dst, cvPoint2D32f(x,y));
    }
/*    inline void sampleGx(image::Image& dst, float* m) const
    {
      image::sampling::quadrangleSubPix(m_imggx, dst, m);
    }
    inline void sampleGy(image::Image& dst, float* m) const
    {
      image::sampling::quadrangleSubPix(m_imggy, dst, m);
    }*/
/*    inline void perspectiveSampleGx(image::Image& dst, float* m) const
    {
      image::sampling::perspectiveSubPic(m_imggx, dst, m);
    }
    inline void perspectiveSampleGy(image::Image& dst, float* m) const
    {
      image::sampling::perspectiveSubPic(m_imggy, dst, m);
    }*/
    inline const float* gx(int x, int y) const
    {
      return reinterpret_cast<const float*>(m_imggx.data(y)) + x;
    }
    inline const float* gy(int x, int y) const
    {
      return reinterpret_cast<const float*>(m_imggy.data(y)) + x;
    }
  public:
    jafar::image::Image m_imggx, m_imggy;
};

}

}

#endif