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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMinimumMaximumImageCalculator.txx,v $
Language: C++
Date: $Date: 2004-04-08 12:04:09 $
Version: $Revision: 1.21 $
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 _itkMinimumMaximumImageCalculator_txx
#define _itkMinimumMaximumImageCalculator_txx
#include "itkMinimumMaximumImageCalculator.h"
#include "itkImageRegionConstIteratorWithIndex.h"
#include "itkNumericTraits.h"
namespace itk
{
/*
* Constructor
*/
template<class TInputImage>
MinimumMaximumImageCalculator<TInputImage>
::MinimumMaximumImageCalculator()
{
m_Image = TInputImage::New();
m_Maximum = NumericTraits<PixelType>::NonpositiveMin() ;
m_Minimum = NumericTraits<PixelType>::max() ;
m_IndexOfMinimum.Fill(0);
m_IndexOfMaximum.Fill(0);
m_RegionSetByUser = false;
}
/*
* Compute Min and Max of m_Image
*/
template<class TInputImage>
void
MinimumMaximumImageCalculator<TInputImage>
::Compute(void)
{
if( !m_RegionSetByUser )
{
m_Region = m_Image->GetRequestedRegion();
}
ImageRegionConstIteratorWithIndex< TInputImage > it( m_Image, m_Region );
m_Maximum = NumericTraits<PixelType>::NonpositiveMin() ;
m_Minimum = NumericTraits<PixelType>::max() ;
while( !it.IsAtEnd() )
{
const PixelType value = it.Get();
if (value > m_Maximum)
{
m_Maximum = value;
m_IndexOfMaximum = it.GetIndex();
}
if (value < m_Minimum)
{
m_Minimum = value;
m_IndexOfMinimum = it.GetIndex();
}
++it;
}
}
/*
* Compute the minimum intensity value of the image
*/
template<class TInputImage>
void
MinimumMaximumImageCalculator<TInputImage>
::ComputeMinimum(void)
{
if( !m_RegionSetByUser )
{
m_Region = m_Image->GetRequestedRegion();
}
ImageRegionConstIteratorWithIndex< TInputImage > it( m_Image, m_Region );
m_Minimum = NumericTraits<PixelType>::max() ;
while( !it.IsAtEnd() )
{
const PixelType value = it.Get();
if (value < m_Minimum)
{
m_Minimum = value;
m_IndexOfMinimum = it.GetIndex();
}
++it;
}
}
/*
* Compute the maximum intensity value of the image
*/
template<class TInputImage>
void
MinimumMaximumImageCalculator<TInputImage>
::ComputeMaximum(void)
{
if( !m_RegionSetByUser )
{
m_Region = m_Image->GetRequestedRegion();
}
ImageRegionConstIteratorWithIndex< TInputImage > it( m_Image, m_Region );
m_Maximum = NumericTraits<PixelType>::NonpositiveMin() ;
while( !it.IsAtEnd() )
{
const PixelType value = it.Get();
if (value > m_Maximum)
{
m_Maximum = value;
m_IndexOfMaximum = it.GetIndex();
}
++it;
}
}
template<class TInputImage>
void
MinimumMaximumImageCalculator<TInputImage>
::SetRegion( const RegionType & region )
{
m_Region = region;
m_RegionSetByUser = true;
}
template<class TInputImage>
void
MinimumMaximumImageCalculator<TInputImage>
::PrintSelf( std::ostream& os, Indent indent ) const
{
Superclass::PrintSelf(os,indent);
os << indent << "Minimum: "
<< static_cast<typename NumericTraits<PixelType>::PrintType>(m_Minimum)
<< std::endl;
os << indent << "Maximum: "
<< static_cast<typename NumericTraits<PixelType>::PrintType>(m_Maximum)
<< std::endl;
os << indent << "Index of Minimum: " << m_IndexOfMinimum << std::endl;
os << indent << "Index of Maximum: " << m_IndexOfMaximum << std::endl;
os << indent << "Image: " << std::endl;
m_Image->Print(os, indent.GetNextIndent());
os << indent << "Region: " << std::endl;
m_Region.Print(os,indent.GetNextIndent());
os << indent << "Region set by User: " << m_RegionSetByUser << std::endl;
}
} // end namespace itk
#endif
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