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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkMeanSampleFilterTest.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkMeanSampleFilter.h"
#include "itkListSample.h"
#include "itkFixedArray.h"
int itkMeanSampleFilterTest(int, char* [] )
{
std::cout << "MeanSampleFilter test \n \n";
bool pass = true;
std::string failureMeassage= "";
const unsigned int MeasurementVectorSize = 2;
const unsigned int numberOfMeasurementVectors = 5;
unsigned int counter;
typedef itk::FixedArray<
float, MeasurementVectorSize > MeasurementVectorType;
typedef itk::Statistics::ListSample<
MeasurementVectorType > SampleType;
SampleType::Pointer sample = SampleType::New();
sample->SetMeasurementVectorSize( MeasurementVectorSize );
MeasurementVectorType measure;
//reset counter
counter = 0;
while ( counter < numberOfMeasurementVectors )
{
for( unsigned int i=0; i<MeasurementVectorSize; i++)
{
measure[i] = counter;
}
sample->PushBack( measure );
counter++;
}
typedef itk::Statistics::MeanSampleFilter< SampleType >
FilterType;
FilterType::Pointer filter = FilterType::New();
std::cout << filter->GetNameOfClass() << std::endl;
filter->Print(std::cout);
//Invoke update before adding an input. An exception should be
//thrown.
try
{
filter->Update();
failureMeassage = "Exception should have been thrown since \
Update() is invoked without setting an input ";
pass = false;
}
catch ( itk::ExceptionObject & excp )
{
std::cerr << "Exception caught: " << excp << std::endl;
}
if ( filter->GetInput() != NULL )
{
pass = false;
failureMeassage = "GetInput() should return NULL if the input \
has not been set";
}
filter->ResetPipeline();
filter->SetInput( sample );
try
{
filter->Update();
}
catch ( itk::ExceptionObject & excp )
{
std::cerr << "Exception caught: " << excp << std::endl;
}
const FilterType::MeasurementVectorDecoratedType * decorator = filter->GetOutput();
FilterType::MeasurementVectorType meanOutput = decorator->Get();
FilterType::MeasurementVectorType mean;
mean[0] = 2.0;
mean[1] = 2.0;
std::cout << meanOutput[0] << " " << mean[0] << " "
<< meanOutput[1] << " " << mean[1] << " " << std::endl;
FilterType::MeasurementVectorType::ValueType epsilon = 1e-6;
if ( ( vcl_fabs( meanOutput[0] - mean[0]) > epsilon ) ||
( vcl_fabs( meanOutput[1] - mean[1]) > epsilon ))
{
pass = false;
failureMeassage = "The result is not what is expected";
}
if( !pass )
{
std::cout << "Test failed." << failureMeassage << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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