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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkStreamingImageFilterTest2.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 <iostream>
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkShrinkImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkImageRegionMultidimensionalSplitter.h"
#include "itkXMLFileOutputWindow.h"
#include "../IO/itkPipelineMonitorImageFilter.h"
int itkStreamingImageFilterTest2(int, char* [] )
{
const unsigned int numberOfStreamDivisions = 25;
itk::XMLFileOutputWindow::Pointer logger = itk::XMLFileOutputWindow::New();
logger->SetInstance(logger);
// typedefs to simplify the syntax
typedef itk::Image<short, 2> ShortImage;
// Test the creation of an image with native type
ShortImage::Pointer if2 = ShortImage::New();
// fill in an image
ShortImage::IndexType index = {{0, 0}};
ShortImage::SizeType size = {{42, 64}};
ShortImage::RegionType region;
region.SetSize( size );
region.SetIndex( index );
if2->SetLargestPossibleRegion( region );
if2->SetBufferedRegion( region );
if2->Allocate();
itk::ImageRegionIterator<ShortImage> iterator(if2, region);
short i=0;
short scalar;
for (; !iterator.IsAtEnd(); ++iterator, ++i)
{
scalar = i;
iterator.Set( scalar );
}
// Create a filter
itk::ShrinkImageFilter< ShortImage, ShortImage >::Pointer shrink;
shrink = itk::ShrinkImageFilter< ShortImage, ShortImage >::New();
shrink->SetInput( if2 );
unsigned int factors[2] = { 2, 3 };
shrink->SetShrinkFactors(factors);
shrink->DebugOn();
itk::ImageRegionMultidimensionalSplitter<2>::Pointer splitter;
splitter = itk::ImageRegionMultidimensionalSplitter<2>::New();
splitter->DebugOn();
// monitor what's going on
itk::PipelineMonitorImageFilter<ShortImage>::Pointer monitor;
monitor = itk::PipelineMonitorImageFilter<ShortImage>::New();
monitor->SetInput( shrink->GetOutput() );
itk::StreamingImageFilter<ShortImage, ShortImage>::Pointer streamer;
streamer = itk::StreamingImageFilter<ShortImage, ShortImage>::New();
streamer->SetInput( monitor->GetOutput() );
streamer->SetNumberOfStreamDivisions( numberOfStreamDivisions );
streamer->SetRegionSplitter( splitter );
streamer->Update();
std::cout << "Input spacing: " << if2->GetSpacing()[0] << ", "
<< if2->GetSpacing()[1] << std::endl;
std::cout << "Output spacing: " << streamer->GetOutput()->GetSpacing()[0]
<< ", "
<< streamer->GetOutput()->GetSpacing()[1] << std::endl;
// check if the pipeline executed as expected
if (monitor->GetNumberOfUpdates() != numberOfStreamDivisions ||
monitor->GetOutputRequestedRegions().size() != numberOfStreamDivisions)
{
std::cout << monitor;
std::cout << "ImageStreaming Filter test failed because pipeline didn't execute as expected." << std::endl;
return EXIT_FAILURE;
}
//
// The rest of this code determines whether the shrink code produced
// the image we expected.
//
ShortImage::RegionType requestedRegion;
requestedRegion = streamer->GetOutput()->GetRequestedRegion();
itk::ImageRegionIterator<ShortImage>
iterator2(streamer->GetOutput(), requestedRegion);
// If size is not a multiple of the shrink factors, then adjust the
// row/col indicies
short rowOffset = 0;
short colOffset = 0;
if (region.GetSize()[1] % shrink->GetShrinkFactors()[1])
{
rowOffset = static_cast<short>(
region.GetSize()[1] / 2.0 -
((region.GetSize()[1] / shrink->GetShrinkFactors()[1]) / 2.0 *
shrink->GetShrinkFactors()[1])
);
}
if (region.GetSize()[0] % shrink->GetShrinkFactors()[0])
{
colOffset = static_cast<short>(
region.GetSize()[0] / 2.0 -
((region.GetSize()[0] / shrink->GetShrinkFactors()[0]) / 2.0 *
shrink->GetShrinkFactors()[0])
);
}
bool passed = true;
for (; !iterator2.IsAtEnd(); ++iterator2)
{
#ifdef ITK_USE_CENTERED_PIXEL_COORDINATES_CONSISTENTLY
short col = itk::Math::RoundHalfIntegerUp<short>( static_cast<float> (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] +
(shrink->GetShrinkFactors()[0] ) / 2.0 ) );
col += colOffset;
short row = itk::Math::RoundHalfIntegerUp<short>( static_cast<float> (shrink->GetShrinkFactors()[1] * iterator2.GetIndex()[1] +
(shrink->GetShrinkFactors()[1] ) / 2.0 ) );
row += rowOffset;
#else
short col = (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] +
(shrink->GetShrinkFactors()[0] - 1) / 2);
col += colOffset;
short row = (shrink->GetShrinkFactors()[1] * iterator2.GetIndex()[1] +
(shrink->GetShrinkFactors()[1] - 1) / 2);
row += rowOffset;
#endif
short trueValue = col + region.GetSize()[0] * row;
if ( iterator2.Get() != trueValue )
{
passed = false;
std::cout << "Pixel " << iterator2.GetIndex()
<< " expected " << trueValue
<< " but got " << iterator2.Get()
<< std::endl;
}
}
if (passed)
{
std::cout << "ImageStreamingFilter test passed." << std::endl;
try
{
return EXIT_SUCCESS;
}
catch (...)
{
std::cout << "Caught an exception on exit" << std::endl;
return EXIT_FAILURE;
}
}
else
{
std::cout << "ImageStreaming Filter test failed." << std::endl;
return EXIT_FAILURE;
}
}
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