// Copyright (C) 2007-2011  CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com

// File   : ShapeRec_FeatureDetector.h
// Author : Renaud NEDELEC, Open CASCADE S.A.S.

// OpenCV includes
#include <cv.h>
#include <highgui.h>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"

// Qt
#include <QString>
#include <QRect>

enum              // Method used for contour detection
{
  CANNY,
  COLORFILTER,
  RIDGE_DETECTOR
};

class ShapeRec_FeatureDetector
{
public:
  
  typedef std::vector<cv::Point>               CvContour;
  typedef std::vector<std::vector<cv::Point> > CvContoursArray;
  
  ShapeRec_FeatureDetector( const QString& );                           // Constructor
  
  void                    ComputeCorners();                              // Detects the corners from the image located at imagePath
  bool                    ComputeLines();                                // Detects the lines from the image located at imagePath
  bool                    ComputeContours( int method );                 // Detects the contours from the image located at imagePath
  
  void                    SetROI( const QRect& );                        // Sets a Region Of Interest in the image
  CvPoint2D32f*           GetCorners()           { return corners;     };
  CvContoursArray         GetContours()          { return contours;    };
  std::vector<cv::Vec4i>  GetLines()             { return lines;       };
  std::vector<cv::Vec4i>  GetContoursHierarchy() { return hierarchy;   };
  int                     GetCornerCount()       { return cornerCount; };
  int                     GetImgHeight()         { return imgHeight;   };
  int                     GetImgWidth()          { return imgWidth;    };
  
  
private:
  std::string             imagePath;
  
  CvPoint2D32f*           corners;
  int                     cornerCount;
  
  CvContoursArray         contours;
  std::vector<cv::Vec4i>  hierarchy;
  std::vector<cv::Vec4i>  lines;
  int                     imgHeight;
  int                     imgWidth; 
  CvRect                  rect;
  
  void                    _detectAndRetrieveContours( cv::Mat binaryImg );
  cv::Mat                 _colorFiltering();
};