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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 "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkChangeInformationImageFilter.h"
#include "itkResampleImageFilter.h"
#include "itkTestingMacros.h"
/* Further testing of itkResampleImageFilter
* Test that ResampleImageFilter can handle a ReferenceImage with
* meta information that differs from the input imake.
* Output is compared with baseline image using the cmake itk_add_test
* '--compare' option.
*/
int itkResampleImageTest3(int argc, char * argv [] )
{
if( argc < 3 )
{
std::cerr << "Usage: "<< argv[0];
std::cerr << " inputImage resampledImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int NDimensions = 2;
typedef unsigned char PixelType;
typedef itk::Image<PixelType, NDimensions> ImageType;
typedef double CoordRepType;
typedef itk::IdentityTransform<CoordRepType,NDimensions> TransformType;
typedef itk::LinearInterpolateImageFunction<ImageType,CoordRepType>
InterpolatorType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
typedef itk::ChangeInformationImageFilter< ImageType > ChangeInfoType;
typedef itk::ResampleImageFilter< ImageType, ImageType > ResampleFilterType;
ReaderType::Pointer reader1 = ReaderType::New();
reader1->SetFileName( argv[1] );
reader1->Update();
// Create an identity transformation
TransformType::Pointer identityTransform = TransformType::New();
// Create a linear interpolation image function
InterpolatorType::Pointer interpolator = InterpolatorType::New();
// Create an image with flipped directions
ImageType::DirectionType direction;
direction[0][0] = -1.0;
direction[0][1] = 0.0;
direction[1][0] = 0.0;
direction[1][1] = -1.0;
ImageType::RegionType inputRegion =
reader1->GetOutput()->GetLargestPossibleRegion();
ImageType::PointType origin;
origin[0] = inputRegion.GetSize()[0];
origin[1] = inputRegion.GetSize()[1];
ChangeInfoType::Pointer changeInfo = ChangeInfoType::New();
changeInfo->ChangeDirectionOn();
changeInfo->SetOutputDirection( direction );
changeInfo->ChangeOriginOn();
changeInfo->SetOutputOrigin( origin );
changeInfo->SetInput( reader1->GetOutput() );
// Create and configure a resampling filter
ResampleFilterType::Pointer resample = ResampleFilterType::New();
EXERCISE_BASIC_OBJECT_METHODS( resample, ResampleImageFilter, ImageToImageFilter );
resample->SetInput( reader1->GetOutput() );
TEST_SET_GET_VALUE( reader1->GetOutput(), resample->GetInput() );
resample->SetReferenceImage( changeInfo->GetOutput() );
TEST_SET_GET_VALUE( changeInfo->GetOutput(), resample->GetReferenceImage() );
resample->UseReferenceImageOn();
TEST_EXPECT_TRUE( resample->GetUseReferenceImage() );
resample->SetTransform( identityTransform );
TEST_SET_GET_VALUE( identityTransform, resample->GetTransform() );
resample->SetInterpolator( interpolator );
TEST_SET_GET_VALUE( interpolator, resample->GetInterpolator() );
WriterType::Pointer writer1 = WriterType::New();
writer1->SetFileName( argv[2] );
writer1->SetInput( resample->GetOutput() );
// Run the resampling filter
try
{
writer1->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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