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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkMath.h"
#include "itkDerivativeOperator.h"
namespace itk {
template< typename TPixel, unsigned int VDimension = 2>
class DerivativeOperatorTestHelper : public DerivativeOperator< TPixel, VDimension >
{
public:
typedef DerivativeOperator< TPixel, VDimension > Superclass;
typedef typename Superclass::CoefficientVector CoefficientVector;
bool CheckCoefficients( const CoefficientVector & expected )
{
CoefficientVector coefficients = this->GenerateCoefficients();
if( itk::Math::NotAlmostEquals( expected.size(), coefficients.size() ) )
{
std::cerr << "Wrong coefficient vector size" << std::endl;
std::cerr << "expected " << expected.size() << std::endl;
std::cerr << "computed " << coefficients.size() << std::endl;
return false;
}
for( unsigned int i=0; i < expected.size(); i++ )
{
if( itk::Math::NotAlmostEquals( expected[i], coefficients[i] ) )
{
std::cerr << "Wrong coefficient value at " << i << std::endl;
std::cerr << "expected " << expected[i] << std::endl;
std::cerr << "computed " << coefficients[i] << std::endl;
return false;
}
}
return true;
}
};
}
int itkDerivativeOperatorTest(int, char* [] )
{
const unsigned int Dimension = 1;
typedef float PixelType;
typedef itk::DerivativeOperatorTestHelper< PixelType, Dimension > OperatorType;
OperatorType op1;
op1.SetOrder(1);
if( op1.GetOrder() != 1 )
{
std::cerr << "Set/GetOrder() failed" << std::endl;
return EXIT_FAILURE;
}
op1.SetOrder(2);
if( op1.GetOrder() != 2 )
{
std::cerr << "Set/GetOrder() failed" << std::endl;
return EXIT_FAILURE;
}
op1.SetOrder(1);
if( op1.GetOrder() != 1 )
{
std::cerr << "Set/GetOrder() failed" << std::endl;
return EXIT_FAILURE;
}
// Exercise PrintSelf
op1.Print( std::cout );
OperatorType::CoefficientVector expected1;
expected1.push_back( 0.5 );
expected1.push_back( 0.0 );
expected1.push_back( -0.5 );
// Check actual coefficient values
if( ! op1.CheckCoefficients( expected1 ) )
{
return EXIT_FAILURE;
}
// Test copy constructor
OperatorType op1b( op1 );
// Check actual coefficient values
if( ! op1b.CheckCoefficients( expected1 ) )
{
std::cerr << "Copy constructor failed" << std::endl;
return EXIT_FAILURE;
}
// Test operator assignment
OperatorType op1c( op1 );
// Check actual coefficient values
if( ! op1c.CheckCoefficients( expected1 ) )
{
std::cerr << "Operator assignment failed" << std::endl;
return EXIT_FAILURE;
}
// Test second order
OperatorType::CoefficientVector expected2;
expected2.push_back( 1 );
expected2.push_back( -2 );
expected2.push_back( 1 );
OperatorType op2;
op2.SetOrder(2);
// Check actual coefficient values
if( ! op2.CheckCoefficients( expected2 ) )
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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