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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkUnaryMedialNodeMetric.h,v $
Language: C++
Date: $Date: 2003-09-10 14:28:40 $
Version: $Revision: 1.2 $
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.
=========================================================================*/
#ifndef __itkUnaryMedialNodeMetric_h
#define __itkUnaryMedialNodeMetric_h
#include "itkLightObject.h"
#include "vnl/vnl_vector_fixed.h"
#include "itkBloxCoreAtomPixel.h"
namespace itk
{
/** \class UnaryMedialNodeMetric
* \brief Compares the scale and dimensionality of two medial nodes.
*
* The class is templated over image dimension. The metric
* measures the similarity of two medial nodes based on
* their eigenvalues and scales. The unary metric is
* calculated by u = sum(L^2 * S), where L is the difference in
* eigenvalues and S is the ratio of the difference in
* medial node scales and sum of the medial node scales.
* The metric is normalized such that a value of 0
* means that the nodes are perfectly similar and that
* a value of 1 means that the nodes are not similar.
*
* Reference: Tamburo, Cois, Shelton, Stetten. Medial Node
* Correspondences Towards Automated Registration, Lecture
* Notes in Computer Science (in press), 2003.
*
* \ingroup ImageFeatureSimilarityMetrics
*/
template<int VDimensions = 3>
class UnaryMedialNodeMetric : public LightObject
{
public:
/** Standard class typedefs. */
typedef UnaryMedialNodeMetric Self;
typedef LightObject Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(UnaryMedialNodeMetric, LightObject);
/** Pixel typedef. */
typedef BloxCoreAtomPixel<VDimensions> MedialNodeType;
typedef typename BloxCoreAtomPixel<VDimensions>::Pointer MedialNodePointerType;
typedef typename MedialNodeType::EigenvalueType EigenvalueType;
/** Initialize and compute the Unary Metric. */
void Initialize(void);
/** Set the two medial nodes to compute a unary metric for. */
void SetMedialNodes(MedialNodeType * medialNodeA, MedialNodeType * medialNodeB);
/** Return the resulting unary metric value for a
* given two medial nodes. */
double GetResult(){return m_MetricResult;}
protected:
/** Default Constructor. */
UnaryMedialNodeMetric();
/** Default Destructor. */
~UnaryMedialNodeMetric(){}
void operator=(const Self&); //purposely not implemented
void PrintSelf(std::ostream& os, Indent indent) const;
private:
/** The two medial nodes to compute the unary metric for. */
MedialNodeType * m_MedialNodeA;
MedialNodeType * m_MedialNodeB;
/** Resulting metric value. */
double m_MetricResult;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkUnaryMedialNodeMetric.txx"
#endif
#endif
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