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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkVectorResampleImageFilterTest.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 "itkVectorResampleImageFilter.h"
#include "itkIdentityTransform.h"
#include "itkVectorLinearInterpolateImageFunction.h"
#include "itkRGBPixel.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkImageFileWriter.h"
#include "itkFilterWatcher.h"
int itkVectorResampleImageFilterTest( int argc, char * argv[] )
{
if( argc < 2 )
{
std::cerr << "Missing Parameters " << std::endl;
std::cerr << "Usage: " << argv[0];
std::cerr << " outputImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef unsigned char PixelComponentType;
typedef itk::RGBPixel< PixelComponentType > PixelType;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::VectorResampleImageFilter<
ImageType, ImageType > FilterType;
FilterType::Pointer filter = FilterType::New();
FilterWatcher watcher(filter);
typedef itk::VectorLinearInterpolateImageFunction<
ImageType, double > InterpolatorType;
InterpolatorType::Pointer interpolator = InterpolatorType::New();
filter->SetInterpolator( interpolator );
typedef itk::IdentityTransform< double, Dimension > TransformType;
TransformType::Pointer transform = TransformType::New();
filter->SetTransform( transform );
ImageType::SpacingType spacing;
spacing.Fill( 1.0 );
ImageType::PointType origin;
origin.Fill( 0.0 );
ImageType::RegionType region;
ImageType::SizeType size;
ImageType::IndexType start;
size[0] = 128;
size[1] = 128;
start[0] = 0;
start[1] = 0;
region.SetSize( size );
region.SetIndex( start );
ImageType::Pointer image = ImageType::New();
image->SetOrigin( origin );
image->SetSpacing( spacing );
image->SetRegions( region );
image->Allocate();
PixelType pixelValue;
itk::ImageRegionIteratorWithIndex< ImageType > it( image, region );
// Fill the image with some color pattern
it.GoToBegin();
while( !it.IsAtEnd() )
{
ImageType::IndexType index = it.GetIndex();
pixelValue.SetRed( index[0] * 2 );
pixelValue.SetGreen( index[0] + index[1] );
pixelValue.SetBlue( index[1] * 2 );
it.Set( pixelValue );
++it;
}
PixelType blackValue;
blackValue.Fill( 0 );
filter->SetDefaultPixelValue( blackValue );
// Set the spacing for the resampling
spacing[0] *= 2.0;
spacing[1] *= 2.0;
filter->SetOutputSpacing( spacing );
// keep the origin
filter->SetOutputOrigin( origin );
// set the size
size[0] /= 2;
size[1] /= 2;
filter->SetSize( size );
filter->SetInput( image );
try
{
filter->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception thrown " << std::endl;
std::cerr << excp << std::endl;
}
// Write an image for regression testing
typedef itk::ImageFileWriter< ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetInput (filter->GetOutput());
writer->SetFileName( argv[1] );
try
{
writer->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception thrown by writer" << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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