itkImageToHistogramFilter.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 itkImageToHistogramFilter_h
#define itkImageToHistogramFilter_h

#include "itkHistogram.h"
#include "itkImageTransformer.h"
#include "itkBarrier.h"
#include "itkSimpleDataObjectDecorator.h"
#include "itkProgressReporter.h"

namespace itk
{
namespace Statistics
{
template< typename TImage >
class ImageToHistogramFilter:public ImageTransformer<TImage>
{
public:
  typedef ImageToHistogramFilter     Self;
  typedef ImageTransformer<TImage>   Superclass;
  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;

  itkTypeMacro(ImageToHistogramFilter, ImageTransformer);

  itkNewMacro(Self);

  typedef TImage                                         ImageType;
  typedef typename ImageType::PixelType                  PixelType;
  typedef typename ImageType::RegionType                 RegionType;
  typedef typename NumericTraits< PixelType >::ValueType ValueType;
  typedef typename NumericTraits< ValueType >::RealType  ValueRealType;

  typedef Histogram< ValueRealType >                    HistogramType;
  typedef typename HistogramType::Pointer               HistogramPointer;
  typedef typename HistogramType::ConstPointer          HistogramConstPointer;
  typedef typename HistogramType::SizeType              HistogramSizeType;
  typedef typename HistogramType::MeasurementType       HistogramMeasurementType;
  typedef typename HistogramType::MeasurementVectorType HistogramMeasurementVectorType;

public:

  const HistogramType * GetOutput() const;
  HistogramType * GetOutput();

  typedef SimpleDataObjectDecorator<
    HistogramSizeType > InputHistogramSizeObjectType;

  typedef SimpleDataObjectDecorator<
    HistogramMeasurementType > InputHistogramMeasurementObjectType;

  typedef SimpleDataObjectDecorator<
    HistogramMeasurementVectorType > InputHistogramMeasurementVectorObjectType;

  typedef SimpleDataObjectDecorator< bool > InputBooleanObjectType;

  itkSetGetDecoratedInputMacro(HistogramSize, HistogramSizeType);

  itkSetGetDecoratedInputMacro(MarginalScale, HistogramMeasurementType);

  itkSetGetDecoratedInputMacro(HistogramBinMinimum, HistogramMeasurementVectorType);
  itkSetGetDecoratedInputMacro(HistogramBinMaximum, HistogramMeasurementVectorType);

  itkSetGetDecoratedInputMacro(AutoMinimumMaximum, bool);

  virtual void GraftOutput(DataObject *output);

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

  void BeforeThreadedGenerateData(void) ITK_OVERRIDE;
  void ThreadedGenerateData(const RegionType & inputRegionForThread, ThreadIdType threadId) ITK_OVERRIDE;
  void AfterThreadedGenerateData(void) ITK_OVERRIDE;

  typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
  using Superclass::MakeOutput;
  DataObject::Pointer  MakeOutput(DataObjectPointerArraySizeType) ITK_OVERRIDE;

  virtual void ThreadedComputeMinimumAndMaximum( const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress );
  virtual void ThreadedComputeHistogram( const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress );

  std::vector< HistogramPointer >               m_Histograms;
  std::vector< HistogramMeasurementVectorType > m_Minimums;
  std::vector< HistogramMeasurementVectorType > m_Maximums;

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

  void ApplyMarginalScale( HistogramMeasurementVectorType & min, HistogramMeasurementVectorType & max, HistogramSizeType & size );
  typename Barrier::Pointer                     m_Barrier;

};
} // end of namespace Statistics
} // end of namespace itk

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

#endif