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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 "itkWarpImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkPipelineMonitorImageFilter.h"
#include "itkMath.h"
typedef itk::Image<float,3> ImageType;
typedef itk::Image<itk::Vector<double,3> , 3 > DisplacementFieldType;
typedef itk::WarpImageFilter<ImageType,
ImageType,
DisplacementFieldType> WarpFilterType;
typedef itk::PipelineMonitorImageFilter<ImageType> MonitorFilter;
#define AllocateImageFromRegionAndSpacing(ImageType,rval,region,spacing) \
{ \
rval = ImageType::New(); \
rval->SetSpacing(spacing); \
rval->SetRegions(region); \
rval->Allocate(); \
}
namespace {
ImageType::Pointer
MakeCheckerboard()
{
typedef itk::ImageRegionIterator<ImageType> IteratorType;
ImageType::SizeType size = {{16,16,16}};
ImageType::SpacingType spacing;
spacing[0] = spacing[1] = spacing[2] = 1.0;
ImageType::IndexType index = {{0,0,0}};
ImageType::RegionType region;
region.SetSize(size);
region.SetIndex(index);
ImageType::Pointer image;
AllocateImageFromRegionAndSpacing(ImageType,image,region,spacing);
image->FillBuffer(0.0);
for( IteratorType it(image,image->GetLargestPossibleRegion()); !it.IsAtEnd(); ++it)
{
ImageType::IndexType ind(it.GetIndex());
// initially checkboard 4 pixels wide
int x = ind[0] / 4;
int y = ind[1] / 4;
int z = ind[2] / 4;
bool black(((x&1) + (y&1)) & 1);
if(z & 1)
{
black = !black;
}
it.Set(black ? 255.0 : 0.0);
}
return image;
}
template <long unsigned int TImageIndexSpaceSize>
typename DisplacementFieldType::Pointer MakeDisplacementField(void)
{
typedef itk::ImageRegionIterator<DisplacementFieldType> IteratorType;
const DisplacementFieldType::SizeType size = {{TImageIndexSpaceSize,TImageIndexSpaceSize,TImageIndexSpaceSize}};
DisplacementFieldType::SpacingType spacing;
spacing[0] = spacing[1] = spacing[2] = 16.0/(double)TImageIndexSpaceSize;
DisplacementFieldType::IndexType index = {{0,0,0}};
DisplacementFieldType::RegionType region;
region.SetSize(size);
region.SetIndex(index);
DisplacementFieldType::Pointer image;
AllocateImageFromRegionAndSpacing(DisplacementFieldType,image,region,spacing);
for( IteratorType it(image,image->GetLargestPossibleRegion()); ! it.IsAtEnd(); ++it)
{
DisplacementFieldType::PixelType pix;
for(unsigned i = 0; i < 3; i++)
{
pix[i] = 1.0;
}
it.Set(pix);
}
return image;
}
}
int
itkWarpImageFilterTest2(int, char * [])
{
// itk::MultiThreader::SetGlobalDefaultNumberOfThreads(1);
// make test image
ImageType::Pointer image = MakeCheckerboard();
// make full-res displacement field
DisplacementFieldType::Pointer defField1 = MakeDisplacementField<16u>();
// make half-res displacement field
DisplacementFieldType::Pointer defField2 = MakeDisplacementField<8u>();
WarpFilterType::Pointer filter = WarpFilterType::New();
// test with full res
filter->SetDisplacementField(defField1);
filter->SetInput(image);
filter->SetOutputParametersFromImage(image);
filter->Update();
ImageType::Pointer result1 = filter->GetOutput();
// test with half res
filter->SetDisplacementField(defField2);
filter->SetInput(image);
filter->SetOutputParametersFromImage(image);
filter->Update();
ImageType::Pointer result2 = filter->GetOutput();
itk::ImageRegionIterator<ImageType>
it1(result1,result1->GetLargestPossibleRegion()),
it2(result2,result1->GetLargestPossibleRegion());
for(it1.GoToBegin(),it2.GoToBegin();
!it1.IsAtEnd() && !it2.IsAtEnd();
++it1, ++it2)
{
if(itk::Math::NotAlmostEquals( it1.Value(), it2.Value() ))
{
std::cout << "Pixels differ " << it1.Value() << " "
<< it2.Value()
<< std::endl;
return EXIT_FAILURE;
}
}
if(it1.IsAtEnd() != it2.IsAtEnd())
{
std::cout << "Iterators don't agree on end of image" << std::endl;
return EXIT_FAILURE;
}
//
// try streaming
MonitorFilter::Pointer monitor1 = MonitorFilter::New();
monitor1->SetInput( image );
WarpFilterType::Pointer filter2 = WarpFilterType::New();
filter2->SetDisplacementField(defField2);
filter2->SetInput( monitor1->GetOutput() );
filter2->SetOutputParametersFromImage(image);
MonitorFilter::Pointer monitor2 = MonitorFilter::New();
monitor2->SetInput(filter2->GetOutput());
typedef itk::StreamingImageFilter<ImageType,ImageType> StreamerType;
StreamerType::Pointer streamer = StreamerType::New();
streamer->SetInput(monitor2->GetOutput());
streamer->SetNumberOfStreamDivisions(4);
streamer->Update();
itk::ImageRegionIterator<ImageType> streamIt(streamer->GetOutput(),
streamer->GetOutput()->GetBufferedRegion());
for(streamIt.GoToBegin(),it2.GoToBegin();
!streamIt.IsAtEnd() && !it2.IsAtEnd();
++streamIt, ++it2)
{
if(itk::Math::NotAlmostEquals( streamIt.Value(), it2.Value() ))
{
std::cout << "Pixels differ " << streamIt.Value() << " "
<< it2.Value()
<< std::endl;
return EXIT_FAILURE;
}
}
if(streamIt.IsAtEnd() != it2.IsAtEnd())
{
std::cout << "Iterators don't agree on end of image" << std::endl;
return EXIT_FAILURE;
}
// this verifies that the pipeline was executed as expected along
// with correct region propagation and output information
if (!monitor2->VerifyAllInputCanStream(4))
{
std::cout << "Filter failed to execute as expected!" << std::endl;
std::cout << monitor2;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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