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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSpatialObjectToImageStatisticsCalculator.h,v $
Language: C++
Date: $Date: 2006-07-17 11:41:53 $
Version: $Revision: 1.9 $
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 __itkSpatialObjectToImageStatisticsCalculator_h
#define __itkSpatialObjectToImageStatisticsCalculator_h
#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkFloodFilledSpatialFunctionConditionalConstIterator.h"
#include "itkMatrix.h"
#include "itkNumericTraits.h"
#include "itkListSample.h"
#include "itkVector.h"
namespace itk
{
/** This calculator computes the mean and the covariance matrice of a certain
* region of an image specified by a spatial object.
* \ingroup Operators
*/
template <class TInputImage, class TInputSpatialObject, unsigned int TSampleDimension=1>
class ITK_EXPORT SpatialObjectToImageStatisticsCalculator : public Object
{
public:
/** Standard class typedefs. */
typedef SpatialObjectToImageStatisticsCalculator Self;
typedef Object 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(SpatialObjectToImageStatisticsCalculator, Object);
/** Type definitions for the input image. */
typedef TInputImage ImageType;
typedef typename TInputImage::Pointer ImagePointer;
typedef typename TInputImage::ConstPointer ImageConstPointer;
typedef typename TInputImage::PixelType PixelType;
typedef typename TInputImage::IndexType IndexType;
typedef typename NumericTraits< PixelType >::AccumulateType AccumulateType;
itkStaticConstMacro(ImageDimension, unsigned int,
ImageType::ImageDimension);
itkStaticConstMacro(SampleDimension, unsigned int,
TSampleDimension);
itkStaticConstMacro(ObjectDimension, unsigned int,
TInputSpatialObject::ObjectDimension);
/** Type definitions for the input spatial object. */
typedef TInputSpatialObject SpatialObjectType;
typedef typename SpatialObjectType::Pointer SpatialObjectPointer;
typedef typename SpatialObjectType::ConstPointer SpatialObjectConstPointer;
/** Type definition of the flood fill iterator */
typedef itk::FloodFilledSpatialFunctionConditionalConstIterator<ImageType,
SpatialObjectType> IteratorType;
/** Vector and Matrix Type */
typedef Vector< double, TSampleDimension> VectorType;
typedef Matrix< double, TSampleDimension, TSampleDimension > MatrixType ;
/** Type definitions for the samples */
typedef itk::Statistics::ListSample< VectorType > SampleType;
/** Set/Get the direction of the sample */
itkSetMacro(SampleDirection,unsigned int);
itkGetMacro(SampleDirection,unsigned int);
/** Set the input image. */
itkSetConstObjectMacro(Image,ImageType);
/** Set the input spatial object. */
itkSetObjectMacro(SpatialObject,SpatialObjectType);
/** Get the mean */
const VectorType & GetMean() const {return m_Mean;}
/** Get the covariance matrix */
const MatrixType & GetCovarianceMatrix() const {return m_CovarianceMatrix;}
/** Get the sum of pixels */
AccumulateType GetSum() const {return m_Sum;}
/** Get the number of pixels inside the object */
itkGetConstMacro(NumberOfPixels,unsigned long);
/** Compute of the input image. */
void Update(void);
protected:
SpatialObjectToImageStatisticsCalculator();
virtual ~SpatialObjectToImageStatisticsCalculator() {};
void PrintSelf(std::ostream& os, Indent indent) const;
bool ComputeStatistics();
private:
SpatialObjectToImageStatisticsCalculator(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
ImageConstPointer m_Image;
SpatialObjectPointer m_SpatialObject;
VectorType m_Mean;
AccumulateType m_Sum;
unsigned long m_NumberOfPixels;
MatrixType m_CovarianceMatrix;
unsigned int m_SampleDirection;
unsigned long m_InternalImageTime;
unsigned long m_InternalSpatialObjectTime;
TimeStamp m_ModifiedTime;
typename SampleType::Pointer m_Sample;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkSpatialObjectToImageStatisticsCalculator.txx"
#endif
#endif /* __itkSpatialObjectToImageStatisticsCalculator_h */
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