text: /*M///////////////////////////////////////////////////////////////////////////////////////
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  //  By downloading, copying, installing or using the software you agree to this license.
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  //  copy or use the software.
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  // Copyright (C) 2013, Alfonso Sanchez-Beato, all rights reserved.
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  //M*/
  
  #ifndef MAPPROJEC_H_
  #define MAPPROJEC_H_
  
  #include "map.hpp"
  
  
  namespace cv {
  namespace reg {
  
  //! @addtogroup reg
  //! @{
  
  /*!
   * Defines an transformation that consists on a projective transformation
   */
  class CV_EXPORTS_W MapProjec : public Map
  {
  public:
      /*!
       * Default constructor builds an identity map
       */
      CV_WRAP MapProjec();
  
      /*!
       * Constructor providing explicit values
       * \param[in] projTr Projective transformation
       */
      CV_WRAP MapProjec(InputArray projTr);
  
      /*!
       * Destructor
       */
      ~MapProjec();
  
      CV_WRAP void inverseWarp(InputArray img1, OutputArray img2) const CV_OVERRIDE;
  
      CV_WRAP cv::Ptr<Map> inverseMap() const CV_OVERRIDE;
  
      CV_WRAP void compose(cv::Ptr<Map> map) CV_OVERRIDE;
  
      CV_WRAP void scale(double factor) CV_OVERRIDE;
  
      /*!
       * Returns projection matrix
       * \return Projection matrix
       */
      const cv::Matx<double, 3, 3>& getProjTr() const {
          return projTr_;
      }
  
      CV_WRAP void getProjTr(OutputArray projTr) const {
          Mat(projTr_).copyTo(projTr);
      }
  
      /*!
       * Normalizes object's homography
       */
      CV_WRAP void normalize() {
          double z = 1./projTr_(2, 2);
          for(size_t v_i = 0; v_i < sizeof(projTr_.val)/sizeof(projTr_.val[0]); ++v_i)
              projTr_.val[v_i] *= z;
      }
  
  private:
      cv::Matx<double, 3, 3> projTr_;       /*< Projection matrix */
  };
  
  //! @}
  
  }}  // namespace cv::reg
  
  #endif  // MAPPROJEC_H_
  