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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 <iostream>
#include "itkLogSigmoidTransferFunction.h"
#include "itkTestingMacros.h"
/**
* This test exercises the functionality of the itk::LogSigmoidTransferFunction
* class
*
*/
namespace itk {
namespace Statistics {
template<class ScalarType>
class LogSigmoidTransferFunctionTestHelper : public LogSigmoidTransferFunction<ScalarType>
{
public:
typedef LogSigmoidTransferFunctionTestHelper Self;
typedef LogSigmoidTransferFunction<ScalarType> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
itkTypeMacro( LogSigmoidTransferFunctionTestHelper, LogSigmoidTransferFunction );
itkNewMacro(Self);
static int Exercise( const ScalarType& input,
const double& expectedVal, const double& expectedDerivVal )
{
double val;
double deriv;
typedef LogSigmoidTransferFunction<ScalarType> LogSigmoidTFType;
typename LogSigmoidTFType::Pointer logSigmoidTF = LogSigmoidTFType::New();
val = static_cast<double>(logSigmoidTF->Evaluate(input));
deriv = static_cast<double>(logSigmoidTF->EvaluateDerivative(input));
TEST_EXPECT_EQUAL( expectedVal, val );
TEST_EXPECT_EQUAL( expectedDerivVal, deriv );
logSigmoidTF->Print(std::cout);
std::cout << "Test succeeded." << std::endl;
return EXIT_SUCCESS;
}
protected:
};
}
}
int itkLogSigmoidTransferFunctionTest( int itkNotUsed(argc), char* itkNotUsed(argv)[] )
{
typedef int ScalarType;
// Set log sigmoid transfer function's parameters and expected values
ScalarType input = 2;
double expectedVal = 0.8807970779778824440597291413024;
double expectedDerivVal = 0.10499358540350651734862418476042;
// Test for all possible ScalarTypes
itk::Statistics::LogSigmoidTransferFunctionTestHelper<unsigned char>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<char>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<unsigned short>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<short>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<unsigned int>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<int>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<unsigned long>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<long>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<float>::Exercise(
input,
expectedVal,
expectedDerivVal );
itk::Statistics::LogSigmoidTransferFunctionTestHelper<double>::Exercise(
input,
expectedVal,
expectedDerivVal );
return EXIT_SUCCESS;
}
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