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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkVectorImageReadWriteTest.cxx,v $
Language: C++
Date: $Date: 2009-03-27 11:30:57 $
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.
=========================================================================*/
#include "itkVector.h"
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkImageLinearConstIteratorWithIndex.h"
#include "itkImageLinearIteratorWithIndex.h"
#include <iostream>
int itkVectorImageReadWriteTest(int argc, char * argv [])
{
if ( argc < 2 )
{
itkGenericOutputMacro(<<"Need a file to process");
return EXIT_FAILURE;
}
// Test for vector pixel type.
const unsigned int Dimension = 2;
// Create image of vector pixels
typedef itk::Vector< double, 4 > PixelType;
typedef itk::Image < PixelType, Dimension> ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
ImageType::Pointer inputImage = ImageType::New();
ReaderType::Pointer reader = ReaderType::New();
WriterType::Pointer writer = WriterType::New();
// In this test, we will create a 9x9 image of vectors with pixels (4,4)
// and (1,6) set to 'vector1'. We will filter it using
// RecursiveGaussianImageFilter and compare a few filtered pixels.
//
//Create ON and OFF vectors
PixelType vector0(0.0);
PixelType vector1;
vector1[0] = 1.0;
vector1[1] = 2.0;
vector1[2] = 3.0;
vector1[3] = 4.0;
typedef itk::ImageLinearIteratorWithIndex< ImageType > IteratorType;
typedef itk::ImageLinearConstIteratorWithIndex< ImageType > ConstIteratorType;
//Create the 9x9 input image
ImageType::SizeType size;
size.Fill( 9 );
ImageType::IndexType index;
index.Fill( 0 );
ImageType::RegionType region;
region.SetSize( size );
region.SetIndex( index );
inputImage->SetLargestPossibleRegion( region );
inputImage->SetBufferedRegion( region );
inputImage->SetRequestedRegion( region );
inputImage->Allocate();
inputImage->FillBuffer( vector0);
std::cout << "Create image of 9x9 image of vector pixels. IO Read and write it. " << std::endl;
/* Set pixel (4,4) with the value 1
* and pixel (1,6) with the value 2
*/
index[0] = 4;
index[1] = 4;
inputImage->SetPixel( index, vector1);
index[0] = 1;
index[1] = 6;
inputImage->SetPixel( index, vector1);
writer->SetInput(inputImage);
writer->SetFileName(argv[1]);
writer->Update();
reader->SetFileName(argv[1]);
reader->Update();
ImageType::Pointer outputImage = reader->GetOutput();
ConstIteratorType cit( outputImage, outputImage->GetLargestPossibleRegion() );
index[0] = 4;
index[1] = 4;
cit.SetIndex(index);
if( cit.Get() != vector1 )
{
std::cout << "Vector Image Write-Read failed. Tried to write " << vector1 <<
" But read " << cit.Get() << std::endl;
return EXIT_FAILURE;
}
index[0] = 0;
index[1] = 0;
cit.SetIndex(index);
if( cit.Get() != vector0 )
{
std::cout << "Vector Image Write-Read failed. Tried to write " << vector0 <<
" But read " << cit.Get() << std::endl;
return EXIT_FAILURE;
}
itk::ImageIOBase::Pointer io = reader->GetImageIO();
std::cout << "ImageIO Pixel Information: "
<< io->GetPixelTypeAsString( io->GetPixelType() ) << " "
<< io->GetComponentTypeAsString( io->GetComponentType() ) << " "
<< io->GetNumberOfComponents() << std::endl;
if ( io->GetNumberOfComponents() != 4 ||
io->GetComponentType() != itk::ImageIOBase::DOUBLE ||
io->GetPixelType() != itk::ImageIOBase::VECTOR)
{
std::cout << "Unexpected pixel information" << std::endl;
std::cout << "Expected: vector double 4" << std::endl;
return EXIT_FAILURE;
}
std::cout << "Image of vector pixels write-read [PASSED]" << std::endl;
std::cout << "Test << operator:: Vector1 = " << vector1 << "[PASSED]" << std::endl;
std::cout << "Test NumericTraits<Vector<double,4>>::Zero " <<
itk::NumericTraits< PixelType >::Zero << std::endl;
std::cout << "Test NumericTraits <Vector <double,4 > >::One " <<
itk::NumericTraits< PixelType >::One << std::endl;
return EXIT_SUCCESS;
}
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