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Morphology.H

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#ifndef MORPHOLOGY_H
#define MORPHOLOGY_H

#include <TensorArray.H>
#include <wrapGL.H>
#include <Vector.H>

namespace xchen
{
  typedef TensorArray<bool, 2> BitMap;           // binary image.
  
  class Morphology 
  {
      static iE2 const neighbors8[8];
      static iE2 const neighbors4[4];             // currently on this cross kernel is used. 
      
      BitMap original_image, dilated_image;       // dilated_image is for Dilate(step).
      set<iE2> central_pnts;                      // all central pnts from all regions, finally will be only one from each region.
      set<iE2> front;                             // current front of dilation. 
      vector< vector<iE2> > pnts_by_region;       // group all central points from the same region into one set,so that we can select one best point from them.

      void init_dataset_for_dilate();
      
  public:
      Morphology() { }
      Morphology(BitMap const& image) : original_image(image)   { init_dataset_for_dilate(); }
      void SetImage(BitMap const& image)                        { original_image = image; init_dataset_for_dilate(); }

      set<iE2>const& operator()()                       { Dilate(); ClassifyPointsByRegion(); SelectUniquePointOfRegion(); return GetCurrentCentralPoints(); }
      
      set<iE2>const& GetCurrentFront() const            { return front; }
      set<iE2>const& GetCurrentCentralPoints() const    { return central_pnts; }
      
      void Dilate() { while( Dilate(1000) ); }                                 
      bool Dilate(int step);                                                   

      void ClassifyPointsByRegion() { while( ClassifyPointsByRegion(1000) ); } 
      bool ClassifyPointsByRegion(int step);                                   

      void SelectUniquePointOfRegion();                                        
  };

}

#endif

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