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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 "itkNaryMaximumImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkMath.h"
#include "itkTestingMacros.h"
// Create a namespace in order to avoid conflicts with other tests.
namespace NaryMaximumImageFilterTest
{
// Define the dimension of the images
const unsigned int Dimension = 3;
// Declare the pixel types of the images
typedef float PixelType;
// Declare the types of the images
typedef itk::Image< PixelType, Dimension > InputImageType;
typedef itk::Image< PixelType, Dimension > OutputImageType;
// Declare the type of the index to access images
typedef itk::Index< Dimension > IndexType;
// Declare the type of the size
typedef itk::Size< Dimension > SizeType;
// Declare the type of the Region
typedef itk::ImageRegion< Dimension > RegionType;
// Declare the type of the Iterators
typedef itk::ImageRegionIteratorWithIndex< InputImageType > InImageIteratorType;
typedef itk::ImageRegionIteratorWithIndex< OutputImageType > OutImageIteratorType;
// Declare the type for the itk::NaryMaximumImageFilter filter
typedef itk::NaryMaximumImageFilter<
InputImageType,
OutputImageType > FilterType;
// Function for image initialization
void InitializeImage( InputImageType * image, double value )
{
InputImageType::Pointer inputImage( image );
// Define their size, and start index
SizeType size;
size[0] = 2;
size[1] = 2;
size[2] = 2;
IndexType start;
start.Fill(0);
RegionType region;
region.SetIndex( start );
region.SetSize( size );
inputImage->SetLargestPossibleRegion( region );
inputImage->SetBufferedRegion( region );
inputImage->SetRequestedRegion( region );
inputImage->Allocate();
InImageIteratorType it( inputImage, inputImage->GetRequestedRegion() );
it.GoToBegin();
while( !it.IsAtEnd() )
{
it.Set( value );
++it;
}
}
// Function for image printing
void PrintImage( InputImageType * image, const char *)
{
// Create an iterator for going through the image
InImageIteratorType it( image, image->GetRequestedRegion() );
it.GoToBegin();
// Print the content of the image
while( !it.IsAtEnd() )
{
std::cout << it.Get() << std::endl;
++it;
}
}
} // end namespace NaryMaximumImageFilterTest
int itkNaryMaximumImageFilterTest( int, char* [] )
{
// It is safe to open the namespace here because
// the symbols will not be exposed outside this function
using namespace NaryMaximumImageFilterTest;
// Create two images
InputImageType::Pointer inputImageA = InputImageType::New();
InputImageType::Pointer inputImageB = InputImageType::New();
static ITK_CONSTEXPR_VAR int minValue = 12;
static ITK_CONSTEXPR_VAR int maxValue = 13;
InitializeImage( inputImageA, minValue );
InitializeImage( inputImageB, maxValue );
PrintImage( inputImageA, "Input image A" );
PrintImage( inputImageB, "Input image B" );
// Create the itk::NaryMaximumImageFilter filter
FilterType::Pointer filter = FilterType::New();
EXERCISE_BASIC_OBJECT_METHODS( filter, NaryMaximumImageFilter,
NaryFunctorImageFilter );
// Set the input images
filter->SetInput( 0, inputImageA );
filter->SetInput( 1, inputImageB );
filter->SetFunctor( filter->GetFunctor() );
// Execute the filter
filter->Update();
// Get the filter output
OutputImageType::Pointer outputImage = filter->GetOutput();
PrintImage( outputImage, "Resulting image 1" );
OutImageIteratorType it( outputImage, outputImage->GetRequestedRegion() );
it.GoToBegin();
while( !it.IsAtEnd() )
{
if( itk::Math::NotExactlyEquals( it.Get(), maxValue ) )
{
std::cerr << "Test Failed!" << std::endl;
return EXIT_FAILURE;
}
++it;
}
// Now try it the other way
InitializeImage( inputImageA, minValue );
InitializeImage( inputImageB, maxValue );
filter->SetInput( 1, inputImageA );
filter->SetInput( 0, inputImageB );
filter->InPlaceOff(); // let's make sure this works too, while we're at it...
// Execute the filter
filter->Update();
PrintImage( outputImage, "Resulting image 2" );
OutImageIteratorType it2( outputImage, outputImage->GetRequestedRegion() );
it2.GoToBegin();
while( !it2.IsAtEnd() )
{
if( itk::Math::NotExactlyEquals( it2.Get(), maxValue ) )
{
std::cerr << "Test Failed!" << std::endl;
return EXIT_FAILURE;
}
++it2;
}
std::cerr << "Test Passed!" << std::endl;
// All objects should be automatically destroyed at this point
return EXIT_SUCCESS;
}
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