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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkCompareHistogramImageToImageMetric.h,v $
Language: C++
Date: $Date: 2004-12-21 22:47:26 $
Version: $Revision: 1.6 $
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 __itkCompareHistogramImageToImageMetric_h
#define __itkCompareHistogramImageToImageMetric_h
#include "itkHistogramImageToImageMetric.h"
namespace itk
{
/** \class CompareHistogramImageToImageMetric
* \brief Compares Histograms between two images to be registered to
* a Training Histogram.
*
* This class is templated over the type of the fixed and moving
* images to be compared.
*
* This metric computes the similarity between the histogram produced
* by two images overlapping and a training histogram.
*
* It is to be sub-classed by the method of comparing the
* histograms.
*
* Generally, the histogram from the training data is to be
* computed in exactly the same way as the histogram from the
* images to be compared are computed. Thus, the user can set the
* interpolator, region, two training images and the transfrom and
* the training histogram will be formed. OR, the user can simply
* calculate the training histogram seperately and set it.
*
* \warning The Initialize function does nothing if the training
* histogram already exists. Thus repeated calls to the Initialize
* function do nothing after the first call. If you wish the
* training histogram to be re-calculated, you should set it to 0.
*
* \author Samson Timoner.
*
* \ingroup RegistrationMetrics */
template <class TFixedImage, class TMovingImage>
class ITK_EXPORT CompareHistogramImageToImageMetric :
public HistogramImageToImageMetric<TFixedImage, TMovingImage>
{
public:
/** Standard class typedefs. */
typedef CompareHistogramImageToImageMetric Self;
typedef HistogramImageToImageMetric<TFixedImage, TMovingImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(CompareHistogramImageToImageMetric,
HistogramImageToImageMetric);
/** Types transferred from the base class */
typedef typename Superclass::RealType RealType;
typedef typename Superclass::TransformType TransformType;
typedef typename Superclass::TransformPointer TransformPointer;
typedef typename TransformType::ConstPointer TransformConstPointer;
typedef typename Superclass::TransformParametersType
TransformParametersType;
typedef typename Superclass::TransformJacobianType TransformJacobianType;
typedef typename Superclass::GradientPixelType GradientPixelType;
typedef typename Superclass::MeasureType MeasureType;
typedef typename Superclass::DerivativeType DerivativeType;
typedef typename Superclass::FixedImageType FixedImageType;
typedef typename Superclass::MovingImageType MovingImageType;
typedef typename Superclass::FixedImageConstPointer FixedImageConstPointer;
typedef typename Superclass::MovingImageConstPointer
MovingImageConstPointer;
typedef typename Superclass::HistogramType HistogramType;
typedef typename Superclass::HistogramSizeType HistogramSizeType;
typedef typename HistogramType::MeasurementVectorType
HistogramMeasurementVectorType;
typedef typename HistogramType::FrequencyType HistogramFrequencyType;
typedef typename HistogramType::Iterator HistogramIteratorType;
typedef typename HistogramType::Pointer HistogramPointerType;
typedef typename Superclass::InterpolatorType InterpolatorType;
typedef typename Superclass::InterpolatorPointer
InterpolatorPointer;
typedef typename Superclass::FixedImageRegionType
FixedImageRegionType;
/** Set the histogram to be used in the metric calculation */
itkSetMacro( TrainingHistogram, HistogramPointerType );
/** Get the histogram to be used in the metric calculation */
itkGetConstReferenceMacro( TrainingHistogram, HistogramPointerType );
/** Set the Training Fixed Image. */
itkSetConstObjectMacro( TrainingFixedImage, FixedImageType );
/** Get the Training Fixed Image. */
itkGetConstObjectMacro( TrainingFixedImage, FixedImageType );
/** Set the Training Moving Image. */
itkSetConstObjectMacro( TrainingMovingImage, MovingImageType );
/** Get the Training Moving Image. */
itkGetConstObjectMacro( TrainingMovingImage, MovingImageType );
/** Set the Training Transform. */
itkSetObjectMacro( TrainingTransform, TransformType );
/** Get a pointer to the Transform. */
itkGetObjectMacro( TrainingTransform, TransformType );
/** Set the Interpolator. */
itkSetObjectMacro( TrainingInterpolator, InterpolatorType );
/** Get a pointer to the Interpolator. */
itkGetObjectMacro( TrainingInterpolator, InterpolatorType );
/** Set the region over which the training histogram will be computed */
itkSetMacro( TrainingFixedImageRegion, FixedImageRegionType );
/** Get the region over which the training histogram will be computed */
itkGetConstReferenceMacro( TrainingFixedImageRegion, FixedImageRegionType );
/** Return the number of parameters required by the Transform */
unsigned int GetNumberOfParameters(void) const
{ return this->GetTransform()->GetNumberOfParameters(); }
/** Forms the histogram of the training images to prepare to evaluate the */
/** metric. Must set all parameters first. */
void Initialize() throw (ExceptionObject);
protected:
/** Constructor is protected to ensure that \c New() function is used to
create instances. */
CompareHistogramImageToImageMetric();
virtual ~CompareHistogramImageToImageMetric(){}
void PrintSelf(std::ostream& os, Indent indent) const;
/** Form the Histogram for the Training data */
void FormTrainingHistogram() throw (ExceptionObject);
/** Evaluates the comparison histogram metric. All sub-classes must
re-implement method. */
virtual MeasureType EvaluateMeasure(HistogramType& histogram) const = 0;
private:
// Purposely not implemented.
CompareHistogramImageToImageMetric(Self const&);
void operator=(Self const&); // Purposely not implemented.
FixedImageConstPointer m_TrainingFixedImage;
MovingImageConstPointer m_TrainingMovingImage;
TransformPointer m_TrainingTransform;
InterpolatorPointer m_TrainingInterpolator;
FixedImageRegionType m_TrainingFixedImageRegion;
HistogramPointerType m_TrainingHistogram;
};
} // End namespace itk.
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkCompareHistogramImageToImageMetric.txx"
#endif
#endif // __itkCompareHistogramImageToImageMetric_h
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