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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 "itkWin32Header.h"
#include <fstream>
#include "itkImageToNeighborhoodSampleAdaptor.h"
#include "itkSubsample.h"
#include "itkImageFileWriter.h"
#include "itkZeroFluxNeumannBoundaryCondition.h"
#include "itkUniformRandomSpatialNeighborSubsampler.h"
#include "itkTestingMacros.h"
int
itkUniformRandomSpatialNeighborSubsamplerTest(int argc, char * argv[])
{
if (argc < 2)
{
std::cerr << "Missing Parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " useClockForSeed [outFileName]" << std::endl;
return EXIT_FAILURE;
}
constexpr unsigned int Dimension = 2;
using FloatImage = itk::Image<float, Dimension>;
using RegionType = FloatImage::RegionType;
using IndexType = FloatImage::IndexType;
using SizeType = FloatImage::SizeType;
using BoundaryCondition = itk::ZeroFluxNeumannBoundaryCondition<FloatImage>;
using AdaptorType = itk::Statistics::ImageToNeighborhoodSampleAdaptor<FloatImage, BoundaryCondition>;
using SamplerType = itk::Statistics::UniformRandomSpatialNeighborSubsampler<AdaptorType, RegionType>;
using WriterType = itk::ImageFileWriter<FloatImage>;
auto inImage = FloatImage::New();
typename SizeType::value_type regionSizeVal = 35;
SizeType sz;
sz.Fill(regionSizeVal);
IndexType idx;
idx.Fill(0);
RegionType region{ idx, sz };
inImage->SetRegions(region);
inImage->AllocateInitialized();
auto sample = AdaptorType::New();
sample->SetImage(inImage);
auto samplerOrig = SamplerType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(samplerOrig, UniformRandomSpatialNeighborSubsampler, SpatialNeighborSubsampler);
SamplerType::InstanceIdentifier query(612);
SamplerType::SubsamplePointer subsample = SamplerType::SubsampleType::New();
// Test exceptions
ITK_TRY_EXPECT_EXCEPTION(samplerOrig->Search(query, subsample));
samplerOrig->SetRadius(20);
ITK_TRY_EXPECT_EXCEPTION(samplerOrig->Search(query, subsample));
samplerOrig->SetSampleRegion(region);
samplerOrig->SetSample(sample);
// Expect a warning about the index being outside the given image region and an empty result
query = std::pow(regionSizeVal, Dimension);
samplerOrig->Search(query, subsample);
typename SamplerType::SubsampleType::TotalAbsoluteFrequencyType expectedTotalFrequency = 0;
ITK_TEST_EXPECT_EQUAL(expectedTotalFrequency, subsample->GetTotalFrequency());
size_t expectedIdHolderSize = 0;
ITK_TEST_EXPECT_EQUAL(expectedIdHolderSize, subsample->GetIdHolder().size());
samplerOrig->CanSelectQueryOn();
query = std::pow(regionSizeVal, Dimension) - 1;
samplerOrig->Search(query, subsample);
expectedTotalFrequency = 441;
ITK_TEST_EXPECT_EQUAL(expectedTotalFrequency, subsample->GetTotalFrequency());
expectedIdHolderSize = 441;
ITK_TEST_EXPECT_EQUAL(expectedIdHolderSize, subsample->GetIdHolder().size());
samplerOrig->SetNumberOfResultsRequested(50);
samplerOrig->SetSeed(100);
samplerOrig->CanSelectQueryOff();
auto useClockForSeed = static_cast<bool>(std::stoi(argv[1]));
ITK_TEST_SET_GET_BOOLEAN(samplerOrig, UseClockForSeed, useClockForSeed);
// Test clone mechanism
SamplerType::Pointer sampler = samplerOrig->Clone().GetPointer();
ITK_TEST_SET_GET_VALUE(samplerOrig->GetSample(), sampler->GetSample());
ITK_TEST_SET_GET_VALUE(samplerOrig->GetSampleRegion(), sampler->GetSampleRegion());
ITK_TEST_SET_GET_VALUE(samplerOrig->GetRadius(), sampler->GetRadius());
ITK_TEST_SET_GET_VALUE(samplerOrig->GetNumberOfResultsRequested(), sampler->GetNumberOfResultsRequested());
ITK_TEST_SET_GET_VALUE(samplerOrig->GetSeed(), sampler->GetSeed());
ITK_TEST_SET_GET_VALUE(samplerOrig->GetCanSelectQuery(), sampler->GetCanSelectQuery());
query = 612;
sampler->Search(query, subsample);
for (SamplerType::SubsampleConstIterator sIt = subsample->Begin(); sIt != subsample->End(); ++sIt)
{
IndexType index;
index = sIt.GetMeasurementVector()[0].GetIndex();
inImage->SetPixel(index, 255);
}
if (argc > 2)
{
const std::string outFileName(argv[2]);
auto writer = WriterType::New();
writer->SetFileName(outFileName);
writer->SetInput(inImage);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
}
std::cout << "Test finished." << std::endl;
return EXIT_SUCCESS;
}
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