itkLaplacianRecursiveGaussianImageFilter.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 __itkLaplacianRecursiveGaussianImageFilter_h
#define __itkLaplacianRecursiveGaussianImageFilter_h

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

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

  typedef TInputImage                        InputImageType;
  typedef typename InputImageType::PixelType PixelType;

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

  typedef typename NumericTraits< PixelType >::RealType RealType;

  typedef float InternalRealType;
  typedef Image< InternalRealType,
                 itkGetStaticConstMacro(ImageDimension) >   RealImageType;

  typedef RecursiveGaussianImageFilter<
    RealImageType,
    RealImageType
    >    GaussianFilterType;

  typedef RecursiveGaussianImageFilter<
    InputImageType,
    RealImageType
    >    DerivativeFilterType;

  typedef typename GaussianFilterType::Pointer GaussianFilterPointer;

  typedef typename DerivativeFilterType::Pointer DerivativeFilterPointer;

  typedef typename TOutputImage::Pointer OutputImagePointer;

  typedef TOutputImage                                 OutputImageType;
  typedef typename          OutputImageType::PixelType OutputPixelType;


  typedef          MemberCommand< Self > CommandType;
  typedef typename CommandType::Pointer  CommandPointer;

  itkNewMacro(Self);

  itkTypeMacro(LaplacianRecursiveGaussianImageFilter,
               ImageToImageFilter);

  void SetSigma(RealType sigma);

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

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

  void GenerateData(void);

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

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

  // special binary functor to perform A+B*ConstValue
  //
  // Where A is the cumulativeImage, B is the last filter, and
  // ConstValue is the spacing scalling
  class AddMultConstFunctor
  {
  public:
    typedef AddMultConstFunctor Self;

    AddMultConstFunctor( void ) : m_Value( NumericTraits<PixelType>::One ) {}

    bool operator!=( const Self &other ) const { return !(*this==other); }
    bool operator==( const Self &other ) const { return m_Value == other.m_Value; }

    inline InternalRealType operator()( const InternalRealType &a, const InternalRealType &b ) const
    {
      return static_cast<InternalRealType>( a + b*m_Value );
    }

    RealType m_Value;
  };

  GaussianFilterPointer   m_SmoothingFilters[ImageDimension - 1];
  DerivativeFilterPointer m_DerivativeFilter;

  bool m_NormalizeAcrossScale;
};
} // end namespace itk

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

#endif