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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkUnaryFunctorImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-03 13:45:32 $
Version: $Revision: 1.24 $
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 __itkUnaryFunctorImageFilter_h
#define __itkUnaryFunctorImageFilter_h
#include "itkInPlaceImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"
namespace itk
{
/** \class UnaryFunctorImageFilter
* \brief Implements pixel-wise generic operation on one image.
*
* This class is parameterized over the type of the input image and
* the type of the output image. It is also parameterized by the
* operation to be applied, using a Functor style.
*
* UnaryFunctorImageFilter allows the output dimension of the filter
* to be larger than the input dimension. Thus subclasses of the
* UnaryFunctorImageFilter (like the CastImageFilter) can be used
* to promote a 2D image to a 3D image, etc.
*
* \sa BinaryFunctorImageFilter TernaryFunctorImageFilter
*
* \ingroup IntensityImageFilters Multithreaded
*/
template <class TInputImage, class TOutputImage, class TFunction >
class ITK_EXPORT UnaryFunctorImageFilter : public InPlaceImageFilter<TInputImage,TOutputImage>
{
public:
/** Standard class typedefs. */
typedef UnaryFunctorImageFilter Self;
typedef InPlaceImageFilter<TInputImage,TOutputImage> 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(UnaryFunctorImageFilter, InPlaceImageFilter);
/** Some typedefs. */
typedef TFunction FunctorType;
typedef TInputImage InputImageType;
typedef typename InputImageType::ConstPointer InputImagePointer;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename InputImageType::PixelType InputImagePixelType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
/** Get the functor object. The functor is returned by reference.
* (Functors do not have to derive from itk::LightObject, so they do
* not necessarily have a reference count. So we cannot return a
* SmartPointer.) */
FunctorType& GetFunctor() { return m_Functor; };
const FunctorType& GetFunctor() const { return m_Functor; };
/** Set the functor object. This replaces the current Functor with a
* copy of the specified Functor. This allows the user to specify a
* functor that has ivars set differently than the default functor.
* This method requires an operator!=() be defined on the functor
* (or the compiler's default implementation of operator!=() being
* appropriate). */
void SetFunctor(const FunctorType& functor)
{
if (m_Functor != functor)
{
m_Functor = functor;
this->Modified();
}
}
protected:
UnaryFunctorImageFilter();
virtual ~UnaryFunctorImageFilter() {};
/** UnaryFunctorImageFilter can produce an image which is a different
* resolution than its input image. As such, UnaryFunctorImageFilter
* needs to provide an implementation for
* GenerateOutputInformation() in order to inform the pipeline
* execution model. The original documentation of this method is
* below.
*
* \sa ProcessObject::GenerateOutputInformaton() */
virtual void GenerateOutputInformation();
/** UnaryFunctorImageFilter can be implemented as a multithreaded filter.
* Therefore, this implementation provides a ThreadedGenerateData() routine
* which is called for each processing thread. The output image data is
* allocated automatically by the superclass prior to calling
* ThreadedGenerateData(). ThreadedGenerateData can only write to the
* portion of the output image specified by the parameter
* "outputRegionForThread"
*
* \sa ImageToImageFilter::ThreadedGenerateData(),
* ImageToImageFilter::GenerateData() */
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
int threadId );
private:
UnaryFunctorImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
FunctorType m_Functor;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkUnaryFunctorImageFilter.txx"
#endif
#endif
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