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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkGaussianSpatialFunction.h,v $
Language: C++
Date: $Date: 2007-02-13 15:52:57 $
Version: $Revision: 1.8 $
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 __itkGaussianSpatialFunction_h
#define __itkGaussianSpatialFunction_h
#include "itkSpatialFunction.h"
#include "itkFixedArray.h"
#include "itkPoint.h"
namespace itk
{
/** \class GaussianSpatialFunction
* \brief N-dimensional gaussian spatial function class
*
* GaussianSpatialFunction implements a standard gaussian curve in N-d.
* m_Normalized determines whether or not the Gaussian is normalized
* (whether or not the sum over infinite space is 1.0)
*
* m_Scale scales the output of the Gaussian to span a range
* larger than 0->1, and is often set to the maximum value
* of the output data type (for instance, 255 for uchars)
*
* \ingroup SpatialFunctions
*/
template <typename TOutput=double,
unsigned int VImageDimension=3,
typename TInput=Point<double, VImageDimension> >
class ITK_EXPORT GaussianSpatialFunction
: public SpatialFunction<TOutput, VImageDimension, TInput>
{
public:
/** Standard class typedefs. */
typedef GaussianSpatialFunction Self;
typedef SpatialFunction<TOutput, VImageDimension, TInput> 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(GaussianSpatialFunction, SpatialFunction);
/** Input type for the function. */
typedef typename Superclass::InputType InputType;
/** Output type for the function. */
typedef typename Superclass::OutputType OutputType;
/** Type used to store gaussian parameters. */
typedef FixedArray<double, VImageDimension> ArrayType;
/** Evaluate the function at a given position. */
OutputType Evaluate(const TInput& position) const;
/** Gets and sets for gaussian parameters */
itkSetMacro(Scale, double);
itkGetMacro(Scale, double);
itkSetMacro(Normalized, bool);
itkGetMacro(Normalized, bool);
itkSetMacro(Sigma, ArrayType);
itkGetMacro(Sigma, ArrayType);
itkSetMacro(Mean, ArrayType);
itkGetMacro(Mean, ArrayType);
protected:
GaussianSpatialFunction();
virtual ~GaussianSpatialFunction();
void PrintSelf(std::ostream& os, Indent indent) const;
private:
GaussianSpatialFunction(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
/** The standard deviation in each direction. */
ArrayType m_Sigma;
/** The mean in each direction. */
ArrayType m_Mean;
/** A scale factor multiplied by the true value of the Gaussian. */
double m_Scale;
/** Whether or not to normalize the Gaussian. */
bool m_Normalized;
};
} // end namespace itk
// Define instantiation macro for this template.
#define ITK_TEMPLATE_GaussianSpatialFunction(_, EXPORT, x, y) namespace itk { \
_(3(class EXPORT GaussianSpatialFunction< ITK_TEMPLATE_3 x >)) \
namespace Templates { typedef GaussianSpatialFunction< ITK_TEMPLATE_3 x >\
GaussianSpatialFunction##y; } \
}
#if ITK_TEMPLATE_EXPLICIT
# include "Templates/itkGaussianSpatialFunction+-.h"
#endif
#if ITK_TEMPLATE_TXX
# include "itkGaussianSpatialFunction.txx"
#endif
#endif
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