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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkCoxDeBoorBSplineKernelFunctionTest.cxx,v $
Language: C++
Date: $Date: 2008-10-05 21:14:46 $
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.
=========================================================================*/
#include "itkCoxDeBoorBSplineKernelFunction.h"
/**
* In this test, we check to see that the coefficients that are
* derived using the Cox-DeBoor recursion algorithm
*/
int itkCoxDeBoorBSplineKernelFunctionTest( int argc, char * argv [] )
{
if ( argc < 1 )
{
std::cerr << "Usage: " << argv[0] << std::endl;
return EXIT_FAILURE;
}
typedef itk::CoxDeBoorBSplineKernelFunction<3> KernelType;
KernelType::Pointer kernel = KernelType::New();
KernelType::MatrixType coefficients;
/**
* order 0
*/
KernelType::MatrixType trueCoefficientsOrder0(1, 1);
trueCoefficientsOrder0[0][0] = 1.0;
kernel->SetSplineOrder( 0 );
coefficients = kernel->GetShapeFunctions();
if( coefficients != trueCoefficientsOrder0 )
{
return EXIT_FAILURE;
}
/**
* order 1
*/
KernelType::MatrixType trueCoefficientsOrder1(1, 2);
trueCoefficientsOrder1[0][0] = -1.0;
trueCoefficientsOrder1[0][1] = 1.0;
kernel->SetSplineOrder( 1 );
coefficients = kernel->GetShapeFunctions();
if( coefficients != trueCoefficientsOrder1 )
{
return EXIT_FAILURE;
}
/**
* order 2
*/
KernelType::MatrixType trueCoefficientsOrder2(2, 3);
trueCoefficientsOrder2[0][0] = -1.0;
trueCoefficientsOrder2[0][1] = 0.0;
trueCoefficientsOrder2[0][2] = 0.75;
trueCoefficientsOrder2[1][0] = 0.5;
trueCoefficientsOrder2[1][1] = -1.5;
trueCoefficientsOrder2[1][2] = 1.125;
kernel->SetSplineOrder( 2 );
coefficients = kernel->GetShapeFunctions();
if( coefficients != trueCoefficientsOrder2 )
{
return EXIT_FAILURE;
}
/**
* order 3
*/
KernelType::MatrixType trueCoefficientsOrder3(2, 4);
trueCoefficientsOrder3[0][0] = 0.5;
trueCoefficientsOrder3[0][1] = -1.0;
trueCoefficientsOrder3[0][2] = 0.0;
trueCoefficientsOrder3[0][3] = 2.0/3.0;
trueCoefficientsOrder3[1][0] = -1.0/6.0;
trueCoefficientsOrder3[1][1] = 1.0;
trueCoefficientsOrder3[1][2] = -2.0;
trueCoefficientsOrder3[1][3] = 4.0/3.0;
kernel->SetSplineOrder( 3 );
coefficients = kernel->GetShapeFunctions();
if( coefficients != trueCoefficientsOrder3 )
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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