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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 "itkConstrainedValueDifferenceImageFilter.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkTestingMacros.h"
int itkConstrainedValueDifferenceImageFilterTest( int argc, char* argv[] )
{
if ( argc < 2 )
{
std::cout << "Usage: " << argv[0]
<< "outputImage " << std::endl;
return EXIT_FAILURE;
}
// Define the dimension of the images
const unsigned int Dimension = 3;
// Define the pixel types
typedef float InputImage1PixelType;
typedef float InputImage2PixelType;
typedef unsigned short OutputImagePixelType;
// Declare the types of the images
typedef itk::Image< InputImage1PixelType, Dimension > InputImage1Type;
typedef itk::Image< InputImage2PixelType, Dimension > InputImage2Type;
typedef itk::Image< OutputImagePixelType, 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;
// Create the two input images
InputImage1Type::Pointer inputImageA = InputImage1Type::New();
InputImage2Type::Pointer inputImageB = InputImage2Type::New();
// Define their size and start index
SizeType size;
size[0] = 2;
size[1] = 2;
size[2] = 2;
IndexType start;
start[0] = 0;
start[1] = 0;
start[2] = 0;
RegionType region;
region.SetIndex( start );
region.SetSize( size );
// Initialize Image A
inputImageA->SetLargestPossibleRegion( region );
inputImageA->SetBufferedRegion( region );
inputImageA->SetRequestedRegion( region );
inputImageA->Allocate();
// Initialize Image B
inputImageB->SetLargestPossibleRegion( region );
inputImageB->SetBufferedRegion( region );
inputImageB->SetRequestedRegion( region );
inputImageB->Allocate();
// Declare Iterator types for each image
typedef itk::ImageRegionIteratorWithIndex< InputImage1Type > InputImage1IteratorType;
typedef itk::ImageRegionIteratorWithIndex< InputImage2Type > InputImage2IteratorType;
// Create one iterator for Image A (this is a light object)
InputImage1IteratorType it1( inputImageA, inputImageA->GetBufferedRegion() );
// Initialize the content of Image A
const InputImage1Type::PixelType valueA = 125;
while( !it1.IsAtEnd() )
{
it1.Set( valueA );
++it1;
}
// Create one iterator for Image B (this is a light object)
InputImage2IteratorType it2( inputImageB, inputImageB->GetBufferedRegion() );
// Initialize the content of Image B: when subtracted from A, the filter will
// saturate a char in some of the pixels
InputImage2Type::PixelType valueB = 120;
while( !it2.IsAtEnd() )
{
it2.Set( valueB );
++it2;
valueB += 1.0;
}
typedef itk::ConstrainedValueDifferenceImageFilter<
InputImage1Type,
InputImage2Type,
OutputImageType > ConstrainedValueDifferenceImageFilterType;
// Create the filter
ConstrainedValueDifferenceImageFilterType::Pointer filter =
ConstrainedValueDifferenceImageFilterType::New();
EXERCISE_BASIC_OBJECT_METHODS( filter, ConstrainedValueDifferenceImageFilter,
BinaryFunctorImageFilter );
// Set the input images
filter->SetInput1( inputImageA );
filter->SetInput2( inputImageB );
filter->SetFunctor( filter->GetFunctor() );
// Execute the filter
filter->Update();
// Get the the filter output
OutputImageType::Pointer outputImage = filter->GetOutput();
// Write the result image
typedef itk::ImageFileWriter< OutputImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( argv[1] );
writer->SetInput( outputImage );
TRY_EXPECT_NO_EXCEPTION( writer->Update() );
// All objects should be automatically destroyed at this point
return EXIT_SUCCESS;
}
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