diffusionSmoother.h

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#ifndef AIMS_PRIMALSKETCH_DIFFUSIONSMOOTHER_H
#define AIMS_PRIMALSKETCH_DIFFUSIONSMOOTHER_H

#include <cstdlib>
#include <aims/primalsketch/imageSmoother.h>

namespace aims
{

template<typename T>
class BaseDiffusionSmoother : public Smoother<AimsData<T>, AimsData<T> >
{
public:
  BaseDiffusionSmoother(float delta_t) {this->SetDt(delta_t);}
  ~BaseDiffusionSmoother() {}
public:
  void check(int maxiter);
  bool optimal() {return true;}
  void SetDt(float Delta_t) {
    if (Delta_t<=0.25) _dt=Delta_t;
    else {
      std::cerr << "Diffusion Smoother : dt must be <= 0.25"
        << std::endl; exit(EXIT_FAILURE);
    }
  }
  virtual AimsData<T> doSmoothing(const AimsData<T> & ima,
      int maxiter, bool verbose=false) = 0;

  float dt() {return _dt;}

public:
  static AimsData<float> init_laplacian(void);
  static AimsData<float> laplacian;

protected:
  float _dt;
};


template<typename T>
class DiffusionSmoother : public BaseDiffusionSmoother<T>
{
public: 
  DiffusionSmoother(float delta_t) : BaseDiffusionSmoother<T>(delta_t),
            _hasConstantSources( false ) {}
  ~DiffusionSmoother() {}

public:
  virtual AimsData<T> doSmoothing(const AimsData<T> & ima,
        int maxiter, bool verbose=false);
  void setConstantSources( const AimsData<T> &, const T & background );
  void removeConstantSources();

private:
  AimsData<T> _constantSources;
  bool _hasConstantSources;
  T _constantSourcesBackground;
};


template<typename T>
class BaseMaskedDiffusionSmoother : public BaseDiffusionSmoother<T>
{
public: 
  BaseMaskedDiffusionSmoother(float delta_t, bool safe=true) :
    BaseDiffusionSmoother<T>(delta_t), _mask(NULL), _safe(safe) {}
  ~BaseMaskedDiffusionSmoother() {}

public:
  virtual AimsData<T> doSmoothing(const AimsData<T> & ima,
        int maxiter, bool verbose=false) = 0;
  void setMask( AimsData<short> *const mask, short background=0)
  {
    _mask = mask;
    _background = background;
  }

protected:
  AimsData<short>    *_mask;
  bool      _safe;
  short      _background;
};



template<typename T, typename N=std::vector<Point3df> >
class MaskedDiffusionSmoother : public BaseMaskedDiffusionSmoother<T>
{
public: 
  MaskedDiffusionSmoother(float delta_t, bool safe=true) :
    BaseMaskedDiffusionSmoother<T>(delta_t, safe) {}
  ~MaskedDiffusionSmoother() {}

public:
  AimsData<T> doSmoothing(const AimsData<T> & ima,
      int maxiter, bool verbose=false);
};

template<typename T>
class MaskedDiffusionSmoother<T, std::vector<Point3df> > :
public BaseMaskedDiffusionSmoother<T>
{
public: 
  MaskedDiffusionSmoother(float delta_t, bool safe=true) :
    BaseMaskedDiffusionSmoother<T>(delta_t, safe),
           _has_neumann_condition(false) {}
  ~MaskedDiffusionSmoother() {}

public:
  virtual AimsData<T> doSmoothing(const AimsData<T> & ima,
        int maxiter, bool verbose=false);
  void add_neumann_condition(const Point3df &p);

private :
  void update_neumann_conditions(AimsData<float> &ima);

private :
  bool      _has_neumann_condition;
  std::vector<Point3df>  _neumann_conditions;
};



template<typename T>
class MaskedDiffusionSmoother<T, AimsData<short> > :
public BaseMaskedDiffusionSmoother<T>
{
public: 
  MaskedDiffusionSmoother(float delta_t, bool safe=true) :
    BaseMaskedDiffusionSmoother<T>(delta_t, safe),
           _neumann_value(1) {}
  ~MaskedDiffusionSmoother() {}

public:
  virtual AimsData<T> doSmoothing(const AimsData<T> & ima,
        int maxiter, bool verbose=false);
  void  set_neumann_value(short value) {
    _neumann_value = value;
  }

  void convolution(const AimsData<float> &ima1,
      AimsData<float> &ima2) const;
private:
  short  _neumann_value;
};

}

#endif