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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 "itkChangeInformationImageFilter.h"
#include "itkCyclicShiftImageFilter.h"
#include "itkImageFileReader.h"
#include <iostream>
int itkCyclicShiftImageFilterTest(int argc, char * argv[])
{
if ( argc != 4 )
{
std::cerr << "Usage: " << argv[0] << " inputImage shiftX shiftY" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef unsigned char PixelType;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ChangeInformationImageFilter< ImageType > ChangeInfoFilterType;
typedef itk::CyclicShiftImageFilter< ImageType > CyclicShiftFilterType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
// Change the origin of the image to make sure we can handle that case.
ChangeInfoFilterType::OutputImageOffsetType newOrigin;
newOrigin[0] = -52;
newOrigin[1] = 37;
ChangeInfoFilterType::Pointer changeInfoFilter = ChangeInfoFilterType::New();
changeInfoFilter->ChangeRegionOn();
changeInfoFilter->SetOutputOffset( newOrigin );
changeInfoFilter->SetInput( reader->GetOutput() );
CyclicShiftFilterType::OffsetType shift;
shift[0] = atoi( argv[2] );
shift[1] = atoi( argv[3] );
CyclicShiftFilterType::Pointer shiftFilter = CyclicShiftFilterType::New();
shiftFilter->SetShift( shift );
shiftFilter->SetInput( changeInfoFilter->GetOutput() );
if ( shift != shiftFilter->GetShift() )
{
std::cerr << "Got unexpected shift " << shiftFilter->GetShift() << " from filter."
<< "Expected " << shift << std::endl;
return EXIT_FAILURE;
}
shiftFilter->Print(std::cout);
// Iterate over the input, map the indices to their indices in the
// output of the filter, and make sure the values match.
shiftFilter->UpdateLargestPossibleRegion();
itk::ImageRegionConstIteratorWithIndex< ImageType > inputIter( reader->GetOutput(),
reader->GetOutput()->GetLargestPossibleRegion() );
ImageType::RegionType imageRegion = reader->GetOutput()->GetLargestPossibleRegion();
ImageType::SizeType imageSize = imageRegion.GetSize();
bool success = true;
const ImageType *shiftFilterOutput = shiftFilter->GetOutput();
for (; !inputIter.IsAtEnd(); ++inputIter )
{
ImageType::IndexType inputIndex = inputIter.GetIndex();
CyclicShiftFilterType::IndexType outputIndex( inputIndex );
for ( unsigned int i = 0; i < Dimension; ++i )
{
outputIndex[i] = ( outputIndex[i] + shift[i] ) % imageSize[i];
if ( outputIndex[i] < 0 ) outputIndex[i] += imageSize[i];
outputIndex[i] += newOrigin[i];
}
PixelType inputPixel = inputIter.Get();
PixelType outputPixel = shiftFilterOutput->GetPixel( outputIndex );
if ( inputPixel != outputPixel )
{
std::cerr << "Mismatch pixel value: inputIndex " << inputIter.GetIndex() << ", inputPixel "
<< static_cast< itk::NumericTraits< PixelType >::PrintType >( inputPixel )
<< ", outputIndex " << outputIndex << ", outputPixel "
<< static_cast< itk::NumericTraits< PixelType >::PrintType >( outputPixel )
<< std::endl;
success = false;
}
}
if ( !success )
{
std::cerr << "Unexpected pixel mismatch(es)." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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