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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include "itkShrinkImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkPipelineMonitorImageFilter.h"
int itkStreamingImageFilterTest(int, char* [] )
{
const unsigned int numberOfStreamDivisions = 4;
// 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 = {{80, 122}};
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] = { 3, 5 };
shrink->SetShrinkFactors(factors);
// shrink->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->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;
// Test itkGetConstReferenceMacro and itkGetModifiableObjectMacro
const unsigned int & value = streamer->GetNumberOfStreamDivisions();
std::cout << "streamer->GetNumberOfStreamDivisions(): " << value << std::endl;
streamer->GetRegionSplitter();
//SplitterType * streamer->GetRegionSplitter();
// check if the pipeline executed as expected
if (monitor->GetNumberOfUpdates() != value ||
monitor->GetOutputRequestedRegions().size() != value)
{
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);
std::cout << "requestedRegion: " << requestedRegion;
// If size is not a multiple of the shrink factors, then adjust the
// row/col indices
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)
{
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;
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;
return EXIT_SUCCESS;
}
else
{
std::cout << "ImageStreaming Filter test failed." << std::endl;
return EXIT_FAILURE;
}
}
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