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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMembershipSampleTest.cxx,v $
Language: C++
Date: $Date: 2005-08-24 15:16:17 $
Version: $Revision: 1.10 $
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 "itkImageToListAdaptor.h"
#include "itkMembershipSample.h"
#include "itkRandomImageSource.h"
#include "itkImageRegionIterator.h"
#include "itkScalarToArrayCastImageFilter.h"
#include "itkFixedArray.h"
int itkMembershipSampleTest(int, char* [] )
{
std::cout << "MembershipSample Test \n \n";
bool pass = true;
std::string whereFail = "" ;
typedef itk::Image< float, 3 > FloatImage ;
// Now generate a random image
typedef itk::RandomImageSource<FloatImage> SourceType;
SourceType::Pointer source = SourceType::New();
unsigned long size[3] = {17, 8, 20} ;
unsigned long totalSize = size[0] * size[1] * size[2] ;
source->SetSize(size);
float minValue = -100.0;
float maxValue = 1000.0;
source->SetMin( static_cast< FloatImage::PixelType >( minValue ) );
source->SetMax( static_cast< FloatImage::PixelType >( maxValue ) );
source->Update() ;
// creat a new image with array pixel type from the source
typedef itk::FixedArray< FloatImage::PixelType, 1 > ArrayPixelType ;
typedef itk::Image< ArrayPixelType, 3 > ArrayPixelImageType ;
typedef itk::ScalarToArrayCastImageFilter< FloatImage, ArrayPixelImageType >
ImageCastFilterType ;
ImageCastFilterType::Pointer castFilter = ImageCastFilterType::New() ;
castFilter->SetInput(source->GetOutput()) ;
castFilter->Update() ;
// creats a sample
typedef itk::Statistics::ImageToListAdaptor< ArrayPixelImageType >
ImageToListAdaptorType ;
ImageToListAdaptorType::Pointer sample = ImageToListAdaptorType::New() ;
sample->SetImage(castFilter->GetOutput()) ;
//creates a memberhip sample
typedef itk::Statistics::MembershipSample< ImageToListAdaptorType >
MembershipSampleType ;
MembershipSampleType::Pointer membershipSample =
MembershipSampleType::New() ;
unsigned int numberOfClasses = 5 ;
membershipSample->SetSample(sample) ;
membershipSample->SetNumberOfClasses(numberOfClasses) ;
// tests begin
if (membershipSample->GetNumberOfClasses() != numberOfClasses)
{
pass = false ;
whereFail = "GetNumberOfClasses()" ;
}
for (ImageToListAdaptorType::InstanceIdentifier iid = 0 ;
iid < static_cast< ImageToListAdaptorType::InstanceIdentifier >
(sample->Size()) ;
iid++)
{
membershipSample->AddInstance( iid % numberOfClasses, iid) ;
if (membershipSample->GetClassLabel(iid) != (iid % numberOfClasses))
{
pass = false ;
whereFail = "AddInstance + GetClassLabel" ;
}
}
for (unsigned int i = 0 ; i < numberOfClasses ; i++)
{
if (membershipSample->GetClassSampleSize(i) !=
totalSize / numberOfClasses)
{
pass = false ;
whereFail = "GetClassSampleSize()" ;
}
}
if (totalSize != membershipSample->Size())
{
pass = false ;
whereFail = "Size()" ;
}
ArrayPixelImageType::IndexType index ;
index.Fill(2) ;// index {2, 2, 2} = instance identifier (offset from image)
ArrayPixelImageType::PixelType pixel = sample->GetImage()->GetPixel(index) ;
ImageToListAdaptorType::InstanceIdentifier id =
static_cast< FloatImage::OffsetValueType >(sample->GetImage()
->ComputeOffset(index)) ;
if (pixel[0] != membershipSample->GetMeasurementVector(id)[0])
{
pass = false ;
whereFail = "GetMeasurementVector()" ;
}
// iterator test
typedef itk::ImageRegionConstIterator< ArrayPixelImageType > ImageIterator ;
ImageIterator i_iter(sample->GetImage(),
sample->GetImage()->GetLargestPossibleRegion()) ;
MembershipSampleType::ConstIterator s_iter = membershipSample->Begin() ;
while (!i_iter.IsAtEnd())
{
if (i_iter.Get()[0] != s_iter.GetMeasurementVector()[0])
{
pass = false ;
whereFail = "Iterator: GetMeasurementVector()" ;
}
++i_iter ;
++s_iter ;
}
if (s_iter != membershipSample->End())
{
pass = false ;
whereFail = "Iterator: End()" ;
}
if( !pass )
{
std::cout << "Test failed in " << whereFail << "." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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