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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkNonThreadedShrinkImageFilter.h
Language: C++
Date: $Date$
Version: $Revision$
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 __itkNonThreadedShrinkImageFilter_h
#define __itkNonThreadedShrinkImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkShrinkImageFilter.h"
namespace itk
{
/** \class NonThreadedShrinkImageFilter
* \brief Reduce the size of an image by an integer factor.
*
* NonThreadedShrinkImageFilter reduces the size of an image by an
* integer factor. The algorithm implemented is a simple
* subsample. Since this filter produces an image which is a different
* resolution and with different pixel spacing than its input image,
* it needs to override several of the methods defined in
* ProcessObject in order to properly manage the pipeline execution
* model. In particular, this filter overrides
* ProcessObject::GenerateInputRequestedRegion() and
* ProcessObject::GenerateOutputInformation().
*
* NOTE: This filter runs the ShrinkImageFilter with the number of
* threads set to 1. To avoid confusion, developers shopuld replace
* this class with ShrinkImageFilter. If you need to limit the number
* of threads, instantiate the afilter and apply the
* SetNumberOfThreads(1) methods.
* \ingroup GeometricTransforms
*/
template <class TInputImage, class TOutputImage>
class ITK_EXPORT NonThreadedShrinkImageFilter:
public ShrinkImageFilter<TInputImage,TOutputImage>
{
public:
/** Standard class typedefs. */
typedef NonThreadedShrinkImageFilter Self;
typedef ImageToImageFilter<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(NonThreadedShrinkImageFilter, ShrinkImageFilter);
virtual void SetNumberOfThreads( int )
{
Superclass::SetNumberOfThreads(1);
}
protected:
NonThreadedShrinkImageFilter()
{
Superclass::SetNumberOfThreads(1);
}
private:
NonThreadedShrinkImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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