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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkNearestNeighborExtrapolateImageFunctionTest.cxx,v $
Language: C++
Date: $Date: 2003-09-10 14:30:09 $
Version: $Revision: 1.3 $
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 "itkNearestNeighborExtrapolateImageFunction.h"
#include "itkImage.h"
#include "itkImageRegionIterator.h"
/**
* This module tests the functionality of the
* NearestNeighborExtrapolateImageFunction class.
*
*/
int itkNearestNeighborExtrapolateImageFunctionTest( int, char *[])
{
typedef double CoordRep;
const unsigned int ImageDimension = 2;
typedef unsigned char PixelType;
typedef itk::Image<PixelType,ImageDimension> ImageType;
ImageType::SizeType imageSize;
imageSize[0] = 5;
imageSize[1] = 7;
ImageType::RegionType imageRegion( imageSize );
ImageType::Pointer image = ImageType::New();
image->SetRegions( imageRegion );
image->Allocate();
typedef itk::ImageRegionIterator<ImageType> Iterator;
Iterator iter( image, imageRegion );
iter.GoToBegin();
unsigned char counter = 0;
while( !iter.IsAtEnd() )
{
iter.Set( counter++ );
++iter;
}
// set up the extrapolator
typedef itk::NearestNeighborExtrapolateImageFunction<ImageType,CoordRep> FunctionType;
FunctionType::Pointer function = FunctionType::New();
function->SetInputImage( image );
FunctionType::IndexType index;
FunctionType::PointType point;
FunctionType::OutputType value;
FunctionType::OutputType trueValue;
// evaluate at point inside the image
point[0] = 2.25;
point[1] = 3.25;
value = function->Evaluate( point );
trueValue = vnl_math_rnd( point[0] ) +
( vnl_math_rnd( point[1] ) ) * static_cast<double>( imageSize[0] );
std::cout << "Point: " << point << " Value: " << value << std::endl;
if ( value != trueValue )
{
std::cout << "Value not the same as trueValue: " << trueValue << std::endl;
std::cout << "Test failed. " << std::endl;
return EXIT_FAILURE;
}
// evaluate at point outside the image
point[0] = 2.25;
point[1] = 8.0;
value = function->Evaluate( point );
trueValue = vnl_math_rnd( point[0] ) +
( 6.0 ) * static_cast<double>( imageSize[0] );
std::cout << "Point: " << point << " Value: " << value << std::endl;
if ( value != trueValue )
{
std::cout << "Value not the same as trueValue: " << trueValue << std::endl;
std::cout << "Test failed. " << std::endl;
return EXIT_FAILURE;
}
// evaluate at index inside the image
index[0] = 4;
index[1] = 5;
value = function->EvaluateAtIndex( index );
trueValue = static_cast<double>( index[0] ) +
static_cast<double>( index[1] ) * static_cast<double>( imageSize[0] );
std::cout << "Index: " << index << " Value: " << value << std::endl;
if ( value != trueValue )
{
std::cout << "Value not the same as trueValue: " << trueValue << std::endl;
std::cout << "Test failed. " << std::endl;
return EXIT_FAILURE;
}
// evaluate at index outside the image
index[0] = 8;
index[1] = -1;
value = function->EvaluateAtIndex( index );
trueValue = static_cast<double>( 4 ) +
static_cast<double>( 0 ) * static_cast<double>( imageSize[0] );
std::cout << "Index: " << index << " Value: " << value << std::endl;
if ( value != trueValue )
{
std::cout << "Value not the same as trueValue: " << trueValue << std::endl;
std::cout << "Test failed. " << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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