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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 "itkDivideOrZeroOutImageFilter.h"
#include "itkImageRegionConstIteratorWithIndex.h"
#include "itkNumericTraits.h"
#include "itkMath.h"
int
itkDivideOrZeroOutImageFilterTest(int, char *[])
{
constexpr unsigned int Dimension = 3;
using PixelType = float;
using ImageType = itk::Image<PixelType, Dimension>;
using DivideFilterType = itk::DivideOrZeroOutImageFilter<ImageType>;
ImageType::SizeType size = { { 10, 12, 14 } };
auto numeratorImage = ImageType::New();
numeratorImage->SetRegions(size);
numeratorImage->Allocate();
numeratorImage->FillBuffer(1.0f);
auto denominatorImage = ImageType::New();
denominatorImage->SetRegions(size);
denominatorImage->Allocate();
// Set input test values
denominatorImage->FillBuffer(1.0f);
ImageType::IndexType zeroIndex = { { 4, 5, 6 } };
denominatorImage->SetPixel(zeroIndex, 0.0f);
// Instantiate and run the filter
auto divider = DivideFilterType::New();
divider->SetInput1(numeratorImage);
divider->SetInput2(denominatorImage);
divider->InPlaceOn();
divider->UpdateLargestPossibleRegion();
ImageType::RegionType region = divider->GetOutput()->GetLargestPossibleRegion();
itk::ImageRegionConstIteratorWithIndex<ImageType> iter(divider->GetOutput(), region);
for (; !iter.IsAtEnd(); ++iter)
{
ImageType::IndexType index = iter.GetIndex();
if (index != zeroIndex)
{
if (iter.Get() != 1.0f)
{
std::cerr << "Incorrect value. Got " << iter.Get() << ", expected 1.0" << std::endl;
return EXIT_FAILURE;
}
}
else
{
if (iter.Get() != 0.0f)
{
std::cerr << "Incorrect value when denominator is below threshold. "
<< "Got " << iter.Get() << ", expected 0.0" << std::endl;
return EXIT_FAILURE;
}
}
}
divider->Print(std::cout);
divider->SetThreshold(2.0f);
if (divider->GetThreshold() != 2.0f)
{
std::cerr << "Threshold not set correctly. Got " << divider->GetThreshold() << ", expected 2.0." << std::endl;
return EXIT_FAILURE;
}
divider->SetConstant(-2.3f);
if (itk::Math::NotExactlyEquals(divider->GetConstant(), -2.3f))
{
std::cerr << "Constant not set correctly. Got " << divider->GetConstant() << ", expected -2.3 ." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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