itkAreaOpeningImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkAreaOpeningImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-06-17 12:17:54 $
  Version:   $Revision: 1.4 $

  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 __itkAreaOpeningImageFilter_h
#define __itkAreaOpeningImageFilter_h

#include "itkAttributeMorphologyBaseImageFilter.h"

namespace itk
{

template <class TInputImage, class TOutputImage, class TAttribute=ITK_TYPENAME TInputImage::SpacingType::ValueType>
class ITK_EXPORT AreaOpeningImageFilter :
    public AttributeMorphologyBaseImageFilter<TInputImage, TOutputImage, TAttribute, std::greater<typename TInputImage::PixelType> >

{
public:
  typedef AreaOpeningImageFilter Self;
  typedef AttributeMorphologyBaseImageFilter<TInputImage, TOutputImage, TAttribute, std::greater<typename TInputImage::PixelType> >
                                 Superclass;

  typedef SmartPointer<Self>        Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  typedef typename TOutputImage::PixelType         OutputPixelType;
  typedef typename TOutputImage::InternalPixelType OutputInternalPixelType;
  typedef typename TInputImage::PixelType          InputPixelType;
  typedef typename TInputImage::InternalPixelType  InputInternalPixelType;
  typedef typename TInputImage::IndexType          IndexType;
  typedef typename TInputImage::OffsetType         OffsetType;
  typedef typename TInputImage::SizeType           SizeType;
  typedef TAttribute                               AttributeType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TOutputImage::ImageDimension);
  
  itkNewMacro(Self);

  itkTypeMacro(AreaOpeningImageFilter, 
               AttributeMorphologyBaseImageFilter);

  itkSetMacro(UseImageSpacing, bool);
  itkGetConstReferenceMacro(UseImageSpacing, bool);
  itkBooleanMacro(UseImageSpacing);

protected:
  AreaOpeningImageFilter()
    {
    m_UseImageSpacing = true;
    }
  virtual ~AreaOpeningImageFilter() {}

  void GenerateData()
    {
    this->m_AttributeValuePerPixel = 1;
    if( m_UseImageSpacing )
      {
      // compute pixel size
      double psize = 1.0;
      for( unsigned i=0; i<ImageDimension; i++)
        {
        psize *= this->GetInput()->GetSpacing()[i];
        }
      this->m_AttributeValuePerPixel = static_cast<AttributeType>( psize );
      // std::cout << "m_AttributeValuePerPixel: " << this->m_AttributeValuePerPixel << std::endl;
      // and call superclass implementation of GenerateData()
      }
    Superclass::GenerateData();
    }

  void PrintSelf(std::ostream& os, Indent indent) const
    {
    Superclass::PrintSelf(os,indent);
    os << indent << "UseImageSpacing: "  << m_UseImageSpacing << std::endl;
    }

private:

  AreaOpeningImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  bool m_UseImageSpacing;

};

} // namespace itk
#endif