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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 "itkImageFileReader.h"
#include "itkDCMTKImageIO.h"
#include "itkImageRegionConstIterator.h"
#include "itkMultiplyImageFilter.h"
#include "itkAddImageFilter.h"
#include "itkSubtractImageFilter.h"
#include "itkStatisticsImageFilter.h"
#include "itkMath.h"
typedef short PixelType;
typedef itk::Image< PixelType, 3 > ImageType;
typedef ImageType::DirectionType DirectionType;
typedef ImageType::SpacingType SpacingType;
typedef ImageType::PointType PointType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::DCMTKImageIO ImageIOType;
namespace
{
//
// if the difference is < average/10000, close enough
bool CloseEnough(double a, double b)
{
double diff = itk::Math::abs(a - b);
double avg = (itk::Math::abs(a) + itk::Math::abs(b)) / 2.0;
if(diff == 0.0 || diff < avg/10000.00)
{
return true;
}
return false;
}
bool
Equal(DirectionType dir1,DirectionType dir2)
{
for(unsigned i = 0; i < 3; ++i)
{
for(unsigned j = 0; j < 3; ++j)
{
if(!CloseEnough(dir1(i,j),dir2(i,j)))
{
return false;
}
}
}
return true;
}
bool
Equal(SpacingType spacing1,SpacingType spacing2)
{
for(unsigned i = 0; i < 3; ++i)
{
if(!CloseEnough(spacing1[i],spacing2[i]))
{
return false;
}
}
return true;
}
}
//
// This tests a Philips Multiframe image orieintation/spacing
// known to exist in the test file in order to ensure that
// they're properly read out of the functional group.
int itkDCMTKImageIOMultiFrameImageTest(int ac, char * av[])
{
if(ac < 2)
{
std::cerr << "Usage: " << av[0]
<< " <multiframe image>"
<< std::endl;
return EXIT_FAILURE;
}
ImageIOType::Pointer dcmImageIO = ImageIOType::New();
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( av[1] );
reader->SetImageIO( dcmImageIO );
try
{
reader->Update();
}
catch (itk::ExceptionObject & e)
{
std::cerr << "exception in file reader " << std::endl;
std::cerr << e << std::endl;
return EXIT_FAILURE;
}
ImageType::Pointer im = reader->GetOutput();
DirectionType dir = im->GetDirection();
SpacingType spacing = im->GetSpacing();
PointType origin = im->GetOrigin();
std::cerr << "Direction " << dir << std::endl
<< "Spacing " << spacing << std::endl
<< "Origin " << origin << std::endl;
DirectionType expectedDirection;
expectedDirection(0,0) = 0.0;
expectedDirection(0,1) = 0.0;
expectedDirection(0,2) = -1.0;
expectedDirection(1,0) = 1.0;
expectedDirection(1,1) = 0.0;
expectedDirection(1,2) = 0.0;
expectedDirection(2,0) = 0.0;
expectedDirection(2,1) = -1.0;
expectedDirection(2,2) = 0.0;
if(!Equal(dir,expectedDirection))
{
std::cerr << "Expected directions" << std::endl
<< expectedDirection << std::endl
<< "Actual directions" << std::endl
<< dir << std::endl;
return EXIT_FAILURE;
}
SpacingType expectedSpacing;
expectedSpacing[0] = expectedSpacing[1] = expectedSpacing[2] = 0.75;
if(!Equal(spacing,expectedSpacing))
{
std::cerr << "Expected spacing" << std::endl
<< expectedSpacing << std::endl
<< "Actual spacing" << std::endl
<< spacing << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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