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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 "itkCastImageFilter.h"
#include "itkShrinkImageFilter.h"
#include "itkPipelineMonitorImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkTestingMacros.h"
int itkShrinkImageStreamingTest(int, char* [] )
{
const unsigned int numberOfStreamDivisions = 4;
// typedefs to simplify the syntax
typedef itk::Image<short, 2> ShortImage;
ShortImage::Pointer sourceImage = ShortImage::New();
typedef itk::PipelineMonitorImageFilter<ShortImage> MonitorFilter;
// fill in an image
ShortImage::IndexType index = {{100, 100}};
ShortImage::SizeType size = {{8, 12}};
ShortImage::RegionType region;
region.SetSize( size );
region.SetIndex( index );
sourceImage->SetRegions( region );
sourceImage->Allocate();
itk::ImageRegionIterator<ShortImage> iterator(sourceImage, region);
short i=0;
for (; !iterator.IsAtEnd(); ++iterator, ++i)
{
iterator.Set( i );
}
// use caster to copy source to intermediate image of only the
// requested region
itk::CastImageFilter<ShortImage, ShortImage>::Pointer caster;
caster = itk::CastImageFilter<ShortImage, ShortImage>::New();
caster->SetInput( sourceImage );
MonitorFilter::Pointer monitor1 = MonitorFilter::New();
monitor1->SetInput( caster->GetOutput() );
// Create a filter, shrink by 2,3
itk::ShrinkImageFilter< ShortImage, ShortImage >::Pointer shrink;
shrink = itk::ShrinkImageFilter< ShortImage, ShortImage >::New();
shrink->SetInput( monitor1->GetOutput() );
unsigned int factors[2] = { 2, 3 };
shrink->SetShrinkFactors(factors);
MonitorFilter::Pointer monitor2 = MonitorFilter::New();
monitor2->SetInput(shrink->GetOutput());
itk::StreamingImageFilter<ShortImage, ShortImage>::Pointer streamer;
streamer = itk::StreamingImageFilter<ShortImage, ShortImage>::New();
streamer->SetInput( monitor2->GetOutput() );
streamer->SetNumberOfStreamDivisions( numberOfStreamDivisions );
streamer->Update();
// this verifies that the pipeline was executed as expected allong
// with correct region propagation and output information
if (!monitor2->VerifyAllInputCanStream(numberOfStreamDivisions))
{
std::cout << "Filter failed to execute as expected!" << std::endl;
std::cout << monitor2;
return EXIT_FAILURE;
}
// Verify that only the data needed is requested;
MonitorFilter::RegionVectorType rr = monitor1->GetOutputRequestedRegions();
for (unsigned int j = 0; j < rr.size(); ++j )
{
TEST_EXPECT_TRUE(rr[j].GetSize(1)%factors[1] == 1);
}
return EXIT_SUCCESS;
}
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