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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkRelabelComponentImageFilter.h, v $
Language: C++
Date: $Date: 2009-04-27 22:58:48 $
Version: $Revision: 1.17 $
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 otbLabelToBoundaryImageFilter_h
#define otbLabelToBoundaryImageFilter_h
#include "otbUnaryFunctorNeighborhoodImageFilter.h"
namespace otb
{
namespace Functor
{
/**
* \class LabelToBoundaryFunctor
*
* \brief Functor to extract segmentation boundaries
*
* Functor intended to work with 3x3 neighborhood and scalar label image
* The generated boundary is 1-pixel wide, so it is not symmetric.
* Output value is 1 on the boundaries and 0 in the background
*
* \ingroup OTBLabelling
*/
template < class TInput, class TOutput >
class LabelToBoundaryFunctor
{
public:
LabelToBoundaryFunctor() { }
virtual ~LabelToBoundaryFunctor() { }
TOutput operator() ( const TInput & input )
{
unsigned char output = 1;
if (input.GetCenterPixel() == input.GetPixel(5) &&
input.GetCenterPixel() == input.GetPixel(7) &&
input.GetCenterPixel() == input.GetPixel(8))
{
output = 0;
}
return static_cast<TOutput>(output);
}
}; // end of class
} // end of Functor namespace
/**
* \class LabelToBoundaryImageFilter
*
* \brief Filter to extract boundaries of a label image
*
* Filter intended to work with a scalar label image.
* The generated boundary is 1-pixel wide, so it is not symmetric.
* Output value is 1 on the boundaries and 0 in the background
*
* \ingroup OTBLabelling
*/
template < class TInputImage, class TOutputImage >
class ITK_EXPORT LabelToBoundaryImageFilter
: public UnaryFunctorNeighborhoodImageFilter< TInputImage, TOutputImage,
Functor::LabelToBoundaryFunctor<
typename itk::ConstNeighborhoodIterator<TInputImage>,
typename TOutputImage::PixelType > >
{
public:
typedef LabelToBoundaryImageFilter Self;
typedef UnaryFunctorNeighborhoodImageFilter< TInputImage, TOutputImage,
Functor::LabelToBoundaryFunctor<
typename itk::ConstNeighborhoodIterator<TInputImage>,
typename TOutputImage::PixelType > > Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
itkNewMacro(Self);
itkTypeMacro(LabelToBoundaryImageFilter,UnaryFunctorNeighborhoodImageFilter);
protected:
LabelToBoundaryImageFilter()
{
this->SetRadius(1);
}
~LabelToBoundaryImageFilter() ITK_OVERRIDE { }
private:
LabelToBoundaryImageFilter( const Self & ); // Not implemented
void operator=( const Self & ); // Not implemented
}; // end of class
} // end of otb namespace
#endif
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