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 itkConnectedThresholdImageFilter_h
  #define itkConnectedThresholdImageFilter_h
  
  #include "itkImageToImageFilter.h"
  #include "itkSimpleDataObjectDecorator.h"
  
  namespace itk
  {
  /** \class ConnectedThresholdImageFilter
   * \brief Label pixels that are connected to a seed and lie within a range of values
   *
   * ConnectedThresholdImageFilter labels pixels with ReplaceValue that are
   * connected to an initial Seed AND lie within a Lower and Upper
   * threshold range.
   *
   * \ingroup RegionGrowingSegmentation
   * \ingroup ITKRegionGrowing
   */
  template< typename TInputImage, typename TOutputImage >
  class ITK_TEMPLATE_EXPORT ConnectedThresholdImageFilter:
    public ImageToImageFilter< TInputImage, TOutputImage >
  {
  public:
    /** Standard class typedefs. */
    typedef ConnectedThresholdImageFilter                   Self;
    typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
    typedef SmartPointer< Self >                            Pointer;
    typedef SmartPointer< const Self >                      ConstPointer;
  
    /** Method for creation through the object factory. */
    itkNewMacro(Self);
  
    /** Run-time type information (and related methods). */
    itkTypeMacro(ConnectedThresholdImageFilter,
                 ImageToImageFilter);
  
    typedef TInputImage                           InputImageType;
    typedef typename InputImageType::Pointer      InputImagePointer;
    typedef typename InputImageType::ConstPointer InputImageConstPointer;
    typedef typename InputImageType::RegionType   InputImageRegionType;
    typedef typename InputImageType::PixelType    InputImagePixelType;
    typedef typename InputImageType::IndexType    IndexType;
    typedef typename std::vector<IndexType>       SeedContainerType;
    typedef typename InputImageType::SizeType     SizeType;
  
    typedef TOutputImage                         OutputImageType;
    typedef typename OutputImageType::Pointer    OutputImagePointer;
    typedef typename OutputImageType::RegionType OutputImageRegionType;
    typedef typename OutputImageType::PixelType  OutputImagePixelType;
  
    void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
  
    /** Set seed point. */
    void SetSeed(const IndexType & seed);
  
    void AddSeed(const IndexType & seed);
  
    /** Clear the seed list. */
    void ClearSeeds();
  
    /** Method to access seed container. */
    virtual const SeedContainerType &GetSeeds() const;
  
    /** Set/Get value to replace thresholded pixels. Pixels that lie *
     *  within Lower and Upper (inclusive) will be replaced with this
     *  value. The default is 1. */
    itkSetMacro(ReplaceValue, OutputImagePixelType);
    itkGetConstMacro(ReplaceValue, OutputImagePixelType);
  
    /** Type of DataObjects to use for scalar inputs */
    typedef SimpleDataObjectDecorator< InputImagePixelType > InputPixelObjectType;
  
    /** Set Upper and Lower Threshold inputs as values */
    virtual void SetUpper(InputImagePixelType);
    virtual void SetLower(InputImagePixelType);
  
    /** Set Threshold inputs that are connected to the pipeline */
    virtual void SetUpperInput(const InputPixelObjectType *);
    virtual void SetLowerInput(const InputPixelObjectType *);
  
    /** Get Upper and Lower Threshold inputs as values. */
    virtual InputImagePixelType GetUpper() const;
    virtual InputImagePixelType GetLower() const;
  
    /** Get Threshold inputs that are connected to the pipeline. */
    virtual InputPixelObjectType * GetUpperInput();
    virtual InputPixelObjectType * GetLowerInput();
  
    /** Image dimension constants. */
    itkStaticConstMacro(InputImageDimension, unsigned int,
                        TInputImage::ImageDimension);
    itkStaticConstMacro(OutputImageDimension, unsigned int,
                        TOutputImage::ImageDimension);
  
  #ifdef ITK_USE_CONCEPT_CHECKING
    // Begin concept checking
    itkConceptMacro( OutputEqualityComparableCheck,
                     ( Concept::EqualityComparable< OutputImagePixelType > ) );
    itkConceptMacro( InputEqualityComparableCheck,
                     ( Concept::EqualityComparable< InputImagePixelType > ) );
    itkConceptMacro( InputConvertibleToOutputCheck,
                     ( Concept::Convertible< InputImagePixelType, OutputImagePixelType > ) );
    itkConceptMacro( SameDimensionCheck,
                     ( Concept::SameDimension< InputImageDimension, OutputImageDimension > ) );
    itkConceptMacro( IntConvertibleToInputCheck,
                     ( Concept::Convertible< int, InputImagePixelType > ) );
    itkConceptMacro( OutputOStreamWritableCheck,
                     ( Concept::OStreamWritable< OutputImagePixelType > ) );
    // End concept checking
  #endif
  
    /** Face connectivity is 4 connected in 2D, 6  connected in 3D, 2*n   in ND
     *  Full connectivity is 8 connected in 2D, 26 connected in 3D, 3^n-1 in ND
     *  Default is to use FaceConnectivity. */
    typedef enum {
      FaceConnectivity,
      FullConnectivity
    } ConnectivityEnumType;
  
    /** Type of connectivity to use (fully connected OR 4(2D), 6(3D),
     * 2*N(ND) connectivity). */
    itkSetEnumMacro(Connectivity, ConnectivityEnumType);
    itkGetEnumMacro(Connectivity, ConnectivityEnumType);
  
  protected:
    ConnectedThresholdImageFilter();
    ~ConnectedThresholdImageFilter() ITK_OVERRIDE {}
  
    // Override since the filter needs all the data for the algorithm.
    void GenerateInputRequestedRegion() ITK_OVERRIDE;
  
    // Override since the filter produces the entire dataset.
    void EnlargeOutputRequestedRegion(DataObject *output) ITK_OVERRIDE;
  
    void GenerateData() ITK_OVERRIDE;
  
  private:
    ITK_DISALLOW_COPY_AND_ASSIGN(ConnectedThresholdImageFilter);
  
    SeedContainerType     m_Seeds;
  
    OutputImagePixelType  m_ReplaceValue;
  
    ConnectivityEnumType  m_Connectivity;
  };
  } // end namespace itk
  
  #ifndef ITK_MANUAL_INSTANTIATION
  #include "itkConnectedThresholdImageFilter.hxx"
  #endif
  
  #endif
  