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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkReflectiveImageRegionIteratorTest.cxx
Language: C++
Date: $Date$
Version: $Revision$
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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkImage.h"
#include <iostream>
#include "itkNumericTraits.h"
#include "itkReflectiveImageRegionIterator.h"
#include "itkReflectiveImageRegionConstIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
int itkReflectiveImageRegionIteratorTest(int, char* [] )
{
std::cout << "Creating an image" << std::endl;
const unsigned int Dimension = 4;
typedef itk::Index<Dimension> PixelType;
typedef itk::Image<PixelType,Dimension> ImageType;
typedef itk::Image<int,Dimension> ImageVisitsType;
typedef itk::ImageRegionIteratorWithIndex<ImageType> IteratorType;
typedef itk::ImageRegionIteratorWithIndex<ImageVisitsType> IteratorVisitsType;
ImageType::Pointer myImage = ImageType::New();
ImageType::SizeType size = {{4,4,4,4}};
ImageType::IndexType start;
start.Fill(0);
ImageType::RegionType region;
region.SetIndex( start );
region.SetSize( size );
myImage->SetLargestPossibleRegion( region );
myImage->SetBufferedRegion( region );
myImage->SetRequestedRegion( region );
myImage->Allocate();
ImageVisitsType::Pointer visitImage = ImageVisitsType::New();
visitImage->SetLargestPossibleRegion( region );
visitImage->SetRequestedRegion( region );
visitImage->SetBufferedRegion( region );
visitImage->Allocate();
IteratorType nit( myImage, region );
IteratorVisitsType vit( visitImage, region );
// Store information on the Image
std::cout << "Storing data in the image ... " << std::endl;
nit.GoToBegin();
vit.GoToBegin();
while( !nit.IsAtEnd() )
{
// set the pixel index as value
nit.Set( nit.GetIndex() );
// Set the number of visits to zero
vit.Set( itk::NumericTraits< ImageVisitsType::PixelType >::Zero );
++nit;
++vit;
}
typedef itk::ReflectiveImageRegionConstIterator< ImageType >
ReflectiveIteratorType;
ReflectiveIteratorType rit( myImage, region );
typedef itk::ReflectiveImageRegionIterator< ImageVisitsType >
ReflectiveVisitsIteratorType;
ReflectiveVisitsIteratorType rvt( visitImage, region );
// Verification
std::cout << "Verifying the reflective iterator... " << std::endl;;
rit.GoToBegin();
rvt.GoToBegin();
while( !rit.IsAtEnd() )
{
PixelType value = rit.Get();
ImageType::IndexType index = rit.GetIndex();
rvt.Set( rvt.Get() + 1 );
if( value != index )
{
std::cerr << "Error : at Index " << index << std::endl;
std::cerr << "It is pointing to " << value << std::endl;
}
++rit;
++rvt;
}
// Each element should be visited 2 ^ # of dimensions
// each left shift = multiply by 2
int visits = ( 1 << (ImageType::ImageDimension));
int failed = 0;
// Verify the number of visits
vit.GoToBegin();
while( !vit.IsAtEnd() )
{
if (vit.Get() != visits)
{
std::cout << vit.GetIndex() << " should not = " << vit.Get() << std::endl;
failed++;
}
++vit;
}
std::cout << std::endl;
if ( failed )
{
std::cout << " FAILED !" << std::endl << std::endl;
return EXIT_FAILURE;
}
std::cout << " PASSED !" << std::endl << std::endl;
return EXIT_SUCCESS;
}
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