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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 "itkVectorImage.h"
#include "itkGradientImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTestingMacros.h"
namespace
{
template <typename TInputImage>
int DoIt( const std::string &infname,
const std::string &outfname )
{
typedef TInputImage InputImageType;
const unsigned int ImageDimension = InputImageType::ImageDimension;
typedef typename InputImageType::PixelType InputPixelType;
typedef itk::ImageFileReader<InputImageType> ReaderType;
typename ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( infname );
typedef itk::GradientImageFilter<InputImageType > FilterType;
typename FilterType::Pointer filter = FilterType::New();
filter->SetInput( reader->GetOutput() );
typedef typename FilterType::OutputImageType OutputImageType;
typedef itk::ImageFileWriter<OutputImageType> WriterType;
typename WriterType::Pointer writer = WriterType::New();
writer->SetInput( filter->GetOutput() );
writer->SetFileName( outfname );
writer->SetNumberOfStreamDivisions( 5 );
writer->Update();
std::cout << filter;
typedef itk::VectorImage<InputPixelType, ImageDimension> VectorImageType;
typedef itk::GradientImageFilter<InputImageType, float, float, VectorImageType> VectorFilterType;
typename VectorFilterType::Pointer vectorFilter = VectorFilterType::New();
vectorFilter->SetInput( reader->GetOutput() );
vectorFilter->Update();
filter->UpdateLargestPossibleRegion();
itk::ImageRegionConstIterator<OutputImageType> iter( filter->GetOutput(),
filter->GetOutput()->GetBufferedRegion() );
itk::ImageRegionConstIterator<VectorImageType> viter( vectorFilter->GetOutput(),
vectorFilter->GetOutput()->GetBufferedRegion() );
// Check the filter output
bool diff = false;
while( !iter.IsAtEnd() )
{
for( unsigned int i = 0; i < ImageDimension; ++i )
{
if ( ! itk::Math::FloatAlmostEqual( iter.Get()[i], viter.Get()[i] ) )
{
diff = true;
}
}
++viter;
++iter;
}
if ( diff )
{
std::cerr << "VectorImage output does not match covariant!" << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
}
int itkGradientImageFilterTest2(int argc, char * argv[] )
{
if ( argc < 3 )
{
std::cerr << "Missing arguments" << std::endl;
std::cerr << "Usage: " << argv[0] << " Inputimage OutputImage" << std::endl;
return EXIT_FAILURE;
}
const std::string infname = argv[1];
const std::string outfname = argv[2];
itk::ImageIOBase::Pointer iobase =
itk::ImageIOFactory::CreateImageIO( infname.c_str(), itk::ImageIOFactory::ReadMode);
if ( iobase.IsNull() )
{
itkGenericExceptionMacro( "Unable to determine ImageIO reader for \"" << infname << "\"" );
}
typedef itk::Image<short,3> TestImageType;
typedef itk::GradientImageFilter<TestImageType > FilterType;
FilterType::Pointer filter = FilterType::New();
EXERCISE_BASIC_OBJECT_METHODS( filter, GradientImageFilter, ImageToImageFilter );
const unsigned int dimension = iobase->GetNumberOfDimensions();
if ( dimension == 2 )
return DoIt< itk::Image<float, 2> >( infname, outfname );
else if ( dimension == 3 )
return DoIt< itk::Image<float, 3> >( infname, outfname );
return EXIT_FAILURE;
}
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