itkSmoothingRecursiveGaussianImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkSmoothingRecursiveGaussianImageFilter_h
#define __itkSmoothingRecursiveGaussianImageFilter_h

#include "itkRecursiveGaussianImageFilter.h"
#include "itkCastImageFilter.h"
#include "itkImage.h"
#include "itkPixelTraits.h"
#include "itkCommand.h"

namespace itk
{
template< typename TInputImage,
          typename TOutputImage = TInputImage >
class ITK_EXPORT SmoothingRecursiveGaussianImageFilter:
  public InPlaceImageFilter< TInputImage, TOutputImage >
{
public:
  typedef SmoothingRecursiveGaussianImageFilter           Self;
  typedef InPlaceImageFilter< TInputImage, TOutputImage > Superclass;
  typedef SmartPointer< Self >                            Pointer;
  typedef SmartPointer< const Self >                      ConstPointer;

  typedef TInputImage                                         InputImageType;
  typedef TOutputImage                                        OutputImageType;
  typedef typename TInputImage::PixelType                     PixelType;
  typedef typename NumericTraits< PixelType >::RealType       RealType;
  typedef typename NumericTraits< PixelType >::ScalarRealType ScalarRealType;

  itkTypeMacro(SmoothingRecursiveGaussianImageFilter,
               ImageToImageFilter);

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  typedef FixedArray< ScalarRealType,
                      itkGetStaticConstMacro(ImageDimension) > SigmaArrayType;

  typedef typename NumericTraits< PixelType >::FloatType InternalRealType;
  typedef typename InputImageType::template Rebind<InternalRealType>::Type RealImageType;

  typedef RecursiveGaussianImageFilter<
    InputImageType,
    RealImageType
    >    FirstGaussianFilterType;

  typedef RecursiveGaussianImageFilter<
    RealImageType,
    RealImageType
    >    InternalGaussianFilterType;

  typedef CastImageFilter<
    RealImageType,
    OutputImageType
    >    CastingFilterType;

  typedef typename InternalGaussianFilterType::Pointer InternalGaussianFilterPointer;

  typedef typename FirstGaussianFilterType::Pointer FirstGaussianFilterPointer;

  typedef typename CastingFilterType::Pointer CastingFilterPointer;

  typedef typename OutputImageType::Pointer OutputImagePointer;

  itkNewMacro(Self);

  void SetSigmaArray(const SigmaArrayType & sigmas);
  void SetSigma(ScalarRealType sigma);

  SigmaArrayType GetSigmaArray() const;
  ScalarRealType GetSigma() const;

  void SetNormalizeAcrossScale(bool normalizeInScaleSpace);
  itkGetConstMacro(NormalizeAcrossScale, bool);

  // See super class for doxygen documentation
  //
  void SetNumberOfThreads(ThreadIdType nb);

  // See super class for doxygen documentation
  //
  virtual bool CanRunInPlace( void ) const;

#ifdef ITK_USE_CONCEPT_CHECKING

  // This concept does not work with variable length vector images
  //itkConceptMacro( InputHasNumericTraitsCheck,
  //( Concept::HasNumericTraits< PixelType > ) );

#endif
protected:
  SmoothingRecursiveGaussianImageFilter();
  virtual ~SmoothingRecursiveGaussianImageFilter() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  void GenerateData(void);

  virtual void GenerateInputRequestedRegion()
  throw( InvalidRequestedRegionError );

  // Override since the filter produces the entire dataset
  void EnlargeOutputRequestedRegion(DataObject *output);

private:
  SmoothingRecursiveGaussianImageFilter(const Self &); //purposely not
                                                       // implemented
  void operator=(const Self &);                        //purposely not

  // implemented

  InternalGaussianFilterPointer m_SmoothingFilters[ImageDimension - 1];
  FirstGaussianFilterPointer    m_FirstSmoothingFilter;
  CastingFilterPointer          m_CastingFilter;

  bool m_NormalizeAcrossScale;

  SigmaArrayType m_Sigma;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkSmoothingRecursiveGaussianImageFilter.hxx"
#endif

#endif