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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 <iostream>
#include "itkDistanceToCentroidMembershipFunction.h"
int
itkDistanceToCentroidMembershipFunctionTest(int, char *[])
{
constexpr unsigned int MeasurementVectorSize = 3;
using MeasurementVectorType = itk::FixedArray<float, MeasurementVectorSize>;
using MembershipFunctionType = itk::Statistics::DistanceToCentroidMembershipFunction<MeasurementVectorType>;
auto function = MembershipFunctionType::New();
std::cout << function->GetNameOfClass() << std::endl;
// set the distance metric type
using DistanceMetricType = itk::Statistics::EuclideanDistanceMetric<MeasurementVectorType>;
using MeasurementVectorSizeType = DistanceMetricType::MeasurementVectorSizeType;
auto distanceMetric = DistanceMetricType::New();
function->SetDistanceMetric(distanceMetric);
if (function->GetDistanceMetric() != distanceMetric)
{
std::cerr << "Error in GetDistanceMetric() " << std::endl;
return EXIT_FAILURE;
}
function->Print(std::cout);
function->SetMeasurementVectorSize(MeasurementVectorSize); // for code coverage
if (function->GetMeasurementVectorSize() != MeasurementVectorSize)
{
std::cerr << "GetMeasurementVectorSize() Failed !" << std::endl;
return EXIT_FAILURE;
}
// Test if an exception will be thrown if we try to resize the measurement vector
// size
try
{
MeasurementVectorSizeType measurementVector2 = MeasurementVectorSize + 1;
function->SetMeasurementVectorSize(measurementVector2);
std::cerr
<< "Exception should have been thrown since we are trying to resize non-resizeable measurement vector type "
<< std::endl;
return EXIT_FAILURE;
}
catch (const itk::ExceptionObject & excp)
{
std::cerr << "Caughted expected exception: " << excp << std::endl;
}
// Test if the distance computed is correct
MembershipFunctionType::CentroidType origin;
itk::NumericTraits<MembershipFunctionType::CentroidType>::SetLength(origin, 3);
origin[0] = 1.5;
origin[1] = 2.3;
origin[2] = 1.0;
function->SetCentroid(origin);
constexpr double tolerance = 0.001;
if (itk::Math::abs(function->GetCentroid()[0] - origin[0]) > tolerance ||
itk::Math::abs(function->GetCentroid()[1] - origin[1]) > tolerance ||
itk::Math::abs(function->GetCentroid()[2] - origin[2]) > tolerance)
{
std::cerr << "Error in GetCentroid() method" << std::endl;
return EXIT_FAILURE;
}
MeasurementVectorType measurement;
itk::NumericTraits<MeasurementVectorType>::SetLength(measurement, 3);
measurement[0] = 2.5;
measurement[1] = 3.3;
measurement[2] = 4.0;
double trueValue = 3.31662;
double distanceComputed = function->Evaluate(measurement);
if (itk::Math::abs(distanceComputed - trueValue) > tolerance)
{
std::cerr << "Distance computed not correct: "
<< "truevalue= " << trueValue << "ComputedValue=" << distanceComputed << std::endl;
return EXIT_FAILURE;
}
// Exercise the Clone method.
MembershipFunctionType::Pointer clonedFunction = function->Clone();
if (clonedFunction.IsNull())
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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