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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 <iostream>
#include "itkGaussianMembershipFunction.h"
int itkGaussianMembershipFunctionTest(int, char* [] )
{
const unsigned int MeasurementVectorSize = 1;
typedef itk::FixedArray<
float, MeasurementVectorSize > MeasurementVectorType;
typedef itk::Statistics::GaussianMembershipFunction< MeasurementVectorType > MembershipFunctionType;
typedef MembershipFunctionType::MeasurementVectorSizeType MeasurementVectorSizeType;
MembershipFunctionType::Pointer function = MembershipFunctionType::New();
std::cout << function->GetNameOfClass() << std::endl;
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
std::cout << "***" << std::endl;
std::cout << "Exception TEST: " << std::endl;
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( itk::ExceptionObject & excp )
{
std::cerr << "Caughted expected exception: " << excp << std::endl;
}
//Test if the membership function value computed is correct
MembershipFunctionType::MeanVectorType mean;
::itk::NumericTraits<MembershipFunctionType::MeanVectorType>::SetLength( mean,
MeasurementVectorSize);
mean[0] = 1.5;
function->SetMean( mean );
const double tolerance = 0.001;
if( std::fabs( function->GetMean()[0] - mean[0]) > tolerance )
{
std::cerr << "Error in GetMean() method" << std::endl;
return EXIT_FAILURE;
}
MembershipFunctionType::CovarianceMatrixType covariance;
covariance.SetSize(MeasurementVectorSize,MeasurementVectorSize);
covariance.SetIdentity();
function->SetCovariance( covariance );
if( function->GetCovariance() != covariance )
{
std::cerr<< "Get/SetCovariance() failure \n" << std::endl;
return EXIT_FAILURE;
}
MeasurementVectorType measurement;
::itk::NumericTraits<MeasurementVectorType>::SetLength( measurement, MeasurementVectorSize);
measurement[0] = 1.5;
double trueValue = 0.3989;
double distanceComputed = function->Evaluate( measurement );
if( std::fabs( distanceComputed - trueValue) > tolerance )
{
std::cerr << "Distance computed not correct: " << "truevalue= " << trueValue
<< ", ComputedValue=" << distanceComputed << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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