text: /*=========================================================================
   *
   *  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 __itkScalarImageToHistogramGenerator_h
  #define __itkScalarImageToHistogramGenerator_h
  
  #include "itkImageToListSampleAdaptor.h"
  #include "itkSampleToHistogramFilter.h"
  #include "itkHistogram.h"
  #include "itkObject.h"
  
  namespace itk
  {
  namespace Statistics
  {
  /** \class ScalarImageToHistogramGenerator
   *
   * \brief TODO
   * \ingroup ITKStatistics
   */
  template< typename TImageType >
  class ScalarImageToHistogramGenerator:public Object
  {
  public:
    /** Standard typedefs */
    typedef ScalarImageToHistogramGenerator Self;
    typedef Object                          Superclass;
    typedef SmartPointer< Self >            Pointer;
    typedef SmartPointer< const Self >      ConstPointer;
  
    /** Run-time type information (and related methods). */
    itkTypeMacro(ScalarImageToHistogramGenerator, Object);
  
    /** standard New() method support */
    itkNewMacro(Self);
  
    typedef TImageType                                             ImageType;
    typedef itk::Statistics::ImageToListSampleAdaptor< ImageType > AdaptorType;
    typedef typename AdaptorType::Pointer                          AdaptorPointer;
    typedef typename ImageType::PixelType                          PixelType;
    typedef typename NumericTraits< PixelType >::RealType          RealPixelType;
  
    typedef itk::Statistics::Histogram< double >                                   HistogramType;
    typedef itk::Statistics::SampleToHistogramFilter< AdaptorType, HistogramType > GeneratorType;
  
    typedef typename GeneratorType::Pointer GeneratorPointer;
  
    typedef typename HistogramType::Pointer      HistogramPointer;
    typedef typename HistogramType::ConstPointer HistogramConstPointer;
  
  public:
  
    /** Triggers the Computation of the histogram */
    void Compute(void);
  
    /** Connects the input image for which the histogram is going to be computed
      */
    void SetInput(const ImageType *);
  
    /** Return the histogram. o
     \warning This output is only valid after the Compute() method has been invoked
     \sa Compute */
    const HistogramType * GetOutput() const;
  
    /** Set number of histogram bins */
    void SetNumberOfBins(unsigned int numberOfBins);
  
    /** Set marginal scale value to be passed to the histogram generator */
    void SetMarginalScale(double marginalScale);
  
    /** Set the minimum value from which the bins will be computed */
    void SetHistogramMin(RealPixelType minimumValue);
  
    /** Set the maximum value from which the bins will be computed */
    void SetHistogramMax(RealPixelType maximumValue);
  
  protected:
    ScalarImageToHistogramGenerator();
    virtual ~ScalarImageToHistogramGenerator() {}
    void PrintSelf(std::ostream & os, Indent indent) const;
  
  private:
  
    AdaptorPointer m_ImageToListSampleAdaptor;
  
    GeneratorPointer m_HistogramGenerator;
  
    ScalarImageToHistogramGenerator(const Self &); //purposely not implemented
    void operator=(const Self &);                  //purposely not implemented
  };
  } // end of namespace Statistics
  } // end of namespace itk
  
  #ifndef ITK_MANUAL_INSTANTIATION
  #include "itkScalarImageToHistogramGenerator.hxx"
  #endif
  
  #endif
  