itkMaximumRatioDecisionRule.h

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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
 *
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 *  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.
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 *=========================================================================*/
#ifndef __itkMaximumRatioDecisionRule_h
#define __itkMaximumRatioDecisionRule_h

#include <vector>
#include "vnl/vnl_matrix.h"

#include "itkNumericTraits.h"
#include "itkDecisionRule.h"

namespace itk
{
namespace Statistics
{
class ITK_EXPORT MaximumRatioDecisionRule : public DecisionRule
{
public:
  typedef MaximumRatioDecisionRule  Self;
  typedef DecisionRule              Superclass;
  typedef SmartPointer< Self >      Pointer;

  itkTypeMacro(MaximumRatioDecisionRule, DecisionRule);

  itkNewMacro(Self);

  typedef Superclass::MembershipValueType  MembershipValueType;
  typedef Superclass::MembershipVectorType MembershipVectorType;

  typedef Superclass::ClassIdentifierType ClassIdentifierType;

  typedef MembershipValueType                      PriorProbabilityValueType;
  typedef std::vector< PriorProbabilityValueType > PriorProbabilityVectorType;
  typedef PriorProbabilityVectorType::size_type    PriorProbabilityVectorSizeType;

  virtual ClassIdentifierType Evaluate(const MembershipVectorType & discriminantScores) const;

  void SetPriorProbabilities(const PriorProbabilityVectorType& p);

  itkGetConstReferenceMacro(PriorProbabilities, PriorProbabilityVectorType);

protected:
  MaximumRatioDecisionRule();
  virtual ~MaximumRatioDecisionRule() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

private:
  MaximumRatioDecisionRule(const Self &); //purposely not implemented
  void operator=(const Self &);            //purposely not implemented

  PriorProbabilityVectorType m_PriorProbabilities;

};  // end of class
} // end of Statistics namespace
} // end of ITK namespace
#endif