itkCurvatureFlowImageFilter.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCurvatureFlowImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-23 16:15:23 $
  Version:   $Revision: 1.37 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkCurvatureFlowImageFilter_h
#define __itkCurvatureFlowImageFilter_h

#include "itkDenseFiniteDifferenceImageFilter.h"
#include "itkCurvatureFlowFunction.h"

namespace itk {

template <class TInputImage, class TOutputImage>
class ITK_EXPORT CurvatureFlowImageFilter
  : public DenseFiniteDifferenceImageFilter<TInputImage, TOutputImage>
{
public:
  typedef CurvatureFlowImageFilter Self;
  typedef DenseFiniteDifferenceImageFilter<TInputImage, TOutputImage>
                                   Superclass;
  typedef SmartPointer<Self>       Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(CurvatureFlowImageFilter,
               DenseFiniteDifferenceImageFilter);

  typedef typename Superclass::InputImageType  InputImageType;

  typedef typename Superclass::OutputImageType OutputImageType;
  typedef typename OutputImageType::Pointer    OutputImagePointer;

  typedef typename Superclass::FiniteDifferenceFunctionType
                                                FiniteDifferenceFunctionType;

  typedef CurvatureFlowFunction<OutputImageType>
                                                CurvatureFlowFunctionType;

  itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension);

  typedef typename Superclass::PixelType    PixelType;

  typedef typename Superclass::TimeStepType TimeStepType;

  itkSetMacro(TimeStep, TimeStepType);

  itkGetMacro(TimeStep, TimeStepType);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(DoubleConvertibleToOutputCheck,
    (Concept::Convertible<double, PixelType>));
  itkConceptMacro(OutputConvertibleToDoubleCheck,
    (Concept::Convertible<PixelType, double>));
  itkConceptMacro(OutputDivisionOperatorsCheck,
    (Concept::DivisionOperators<PixelType>));
  itkConceptMacro(DoubleOutputMultiplyOperatorCheck,
    (Concept::MultiplyOperator<double, PixelType, PixelType>));
  itkConceptMacro(IntOutputMultiplyOperatorCheck,
    (Concept::MultiplyOperator<int, PixelType, PixelType>));
  itkConceptMacro(OutputLessThanDoubleCheck,
    (Concept::LessThanComparable<PixelType, double>));
  itkConceptMacro(OutputDoubleAdditiveOperatorsCheck,
    (Concept::AdditiveOperators<PixelType, double>));

#endif

protected:
  CurvatureFlowImageFilter();
  ~CurvatureFlowImageFilter() {}
  void PrintSelf(std::ostream& os, Indent indent) const;
  
  virtual bool Halt()
    {
    if (this->GetElapsedIterations() == this->GetNumberOfIterations())
      {
      return true;
      }
    else
      {
      return false;
      }
    }

  virtual void InitializeIteration();

  virtual void EnlargeOutputRequestedRegion(DataObject *);

  virtual void GenerateInputRequestedRegion();

private:
  CurvatureFlowImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  TimeStepType    m_TimeStep;
};

} // end namspace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkCurvatureFlowImageFilter.txx"
#endif

#endif

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