itkHistogramToImageFilter.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 itkHistogramToImageFilter_h
#define itkHistogramToImageFilter_h

#include "itkImageSource.h"
#include "itkConceptChecking.h"
#include "itkHistogram.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkSimpleDataObjectDecorator.h"

namespace itk
{
template< typename THistogram, typename TImage, typename TFunction >
class HistogramToImageFilter:
  public ImageSource< TImage >
{
public:

  typedef TFunction                                           FunctorType;
  typedef HistogramToImageFilter                              Self;
  typedef ImageSource< TImage >                               Superclass;
  typedef SmartPointer< Self >                                Pointer;
  typedef SmartPointer< const Self >                          ConstPointer;

  typedef TImage                                              OutputImageType;
  typedef typename Superclass::Pointer                        OutputImagePointer;
  typedef typename OutputImageType::SpacingType               SpacingType;
  typedef typename OutputImageType::PointType                 PointType;
  typedef typename OutputImageType::PixelType                 OutputPixelType;

  // Define an iterator to iterate through the image
  typedef itk::ImageRegionIteratorWithIndex< OutputImageType > ImageIteratorType;

  itkNewMacro(Self);

  itkTypeMacro(HistogramToImageFilter, ImageSource);

  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;

  typedef THistogram                                    HistogramType;
  typedef typename HistogramType::MeasurementVectorType MeasurementVectorType;
  typedef typename HistogramType::SizeType              HistogramSizeType;
  typedef typename OutputImageType::SizeType            SizeType;

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

  using Superclass::SetInput;
  virtual void SetInput(const HistogramType *histogram);

  const HistogramType * GetInput();

  void SetFunctor(const FunctorType & functor)
  {
    m_Functor = functor;
    this->Modified();
  }

  FunctorType & GetFunctor() { return m_Functor; }
  const FunctorType & GetFunctor() const { return m_Functor; }

  void SetTotalFrequency(SizeValueType n);

protected:
  HistogramToImageFilter();
  ~HistogramToImageFilter();

  virtual void GenerateOutputInformation() ITK_OVERRIDE;

  virtual void GenerateData() ITK_OVERRIDE;

  FunctorType m_Functor;

  virtual void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;

private:
  HistogramToImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);         //purposely not implemented
};
} // end namespace itk

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

#endif