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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkIntensityWindowingImageFilterTest.cxx,v $
Language: C++
Date: $Date: 2007-01-29 14:42:11 $
Version: $Revision: 1.5 $
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 <iostream>
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkIntensityWindowingImageFilter.h"
#include "itkRandomImageSource.h"
#include "itkMinimumMaximumImageCalculator.h"
int itkIntensityWindowingImageFilterTest(int, char* [] )
{
std::cout << "itkIntensityWindowingImageFilterTest Start" << std::endl;
typedef itk::Image<float,3> TestInputImage;
typedef itk::Image<float,3> TestOutputImage;
TestInputImage::Pointer inputImage = TestInputImage::New();
TestInputImage::RegionType region;
TestInputImage::SizeType size; size.Fill(64);
TestInputImage::IndexType index; index.Fill(0);
region.SetIndex (index);
region.SetSize (size);
typedef itk::IntensityWindowingImageFilter<TestInputImage,TestOutputImage> FilterType;
FilterType::Pointer filter = FilterType::New();
// Now generate a real image
typedef itk::RandomImageSource<TestInputImage> SourceType;
SourceType::Pointer source = SourceType::New();
unsigned long randomSize[3] = {17, 8, 20};
// Set up source
source->SetSize(randomSize);
double minValue = -128.0;
double maxValue = 127.0;
source->SetMin( static_cast< TestInputImage::PixelType >( minValue ) );
source->SetMax( static_cast< TestInputImage::PixelType >( maxValue ) );
filter->SetInput(source->GetOutput());
const double desiredMinimum = -1.0;
const double desiredMaximum = 1.0;
const float windowMinimum = -50.0f;
const float windowMaximum = 50.0f;
filter->SetOutputMinimum( desiredMinimum );
filter->SetOutputMaximum( desiredMaximum );
filter->SetWindowMinimum( windowMinimum );
filter->SetWindowMaximum( windowMaximum );
std::cout << "Window minimum:maximum = " << windowMinimum << ":" << windowMaximum << ", equivalent window:level = " << filter->GetWindow() << ":" << filter->GetLevel() << std::endl;
try
{
filter->UpdateLargestPossibleRegion();
filter->SetFunctor(filter->GetFunctor());
}
catch (itk::ExceptionObject& e)
{
std::cerr << "Exception detected: " << e;
return -1;
}
typedef itk::MinimumMaximumImageCalculator< TestOutputImage > CalculatorType;
CalculatorType::Pointer calculator = CalculatorType::New();
calculator->SetImage( filter->GetOutput() );
calculator->Compute();
const double tolerance = 1e-7;
const double obtainedMinimum = calculator->GetMinimum();
const double obtainedMaximum = calculator->GetMaximum();
if( vnl_math_abs( obtainedMinimum - desiredMinimum ) > tolerance )
{
std::cerr << "Error in minimum" << std::endl;
std::cerr << "Expected minimum = " << desiredMinimum << std::endl;
std::cerr << "Obtained minimum = " << obtainedMinimum << std::endl;
return EXIT_FAILURE;
}
if( vnl_math_abs( obtainedMaximum - desiredMaximum ) > tolerance )
{
std::cerr << "Error in maximum" << std::endl;
std::cerr << "Expected maximum = " << desiredMaximum << std::endl;
std::cerr << "Obtained maximum = " << obtainedMaximum << std::endl;
return EXIT_FAILURE;
}
const float window = 50.0f;
const float level = 50.0f;
filter->SetWindowLevel( window, level );
std::cout << "Window:level = " << filter->GetWindow() << ":" << filter->GetLevel() << ", equivalent window minimum:maximum = " << filter->GetWindowMinimum() << ":" << filter->GetWindowMaximum() << std::endl;
try
{
filter->UpdateLargestPossibleRegion();
}
catch (itk::ExceptionObject& e)
{
std::cerr << "Exception detected: " << e;
return -1;
}
calculator->Compute();
const double obtainedMinimum2 = calculator->GetMinimum();
const double obtainedMaximum2 = calculator->GetMaximum();
if( vnl_math_abs( obtainedMinimum2 - desiredMinimum ) > tolerance )
{
std::cerr << "Error in minimum" << std::endl;
std::cerr << "Expected minimum = " << desiredMinimum << std::endl;
std::cerr << "Obtained minimum = " << obtainedMinimum2 << std::endl;
return EXIT_FAILURE;
}
if( vnl_math_abs( obtainedMaximum2 - desiredMaximum ) > tolerance )
{
std::cerr << "Error in maximum" << std::endl;
std::cerr << "Expected maximum = " << desiredMaximum << std::endl;
std::cerr << "Obtained maximum = " << obtainedMaximum2 << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test PASSED ! " << std::endl;
return EXIT_SUCCESS;
}
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