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 itkIsolatedWatershedImageFilter_h
  #define itkIsolatedWatershedImageFilter_h
  
  #include "itkWatershedImageFilter.h"
  #include "itkGradientMagnitudeImageFilter.h"
  
  namespace itk
  {
  /** \class IsolatedWatershedImageFilter
   * \brief Isolate watershed basins using two seeds
   *
   * IsolatedWatershedImageFilter labels pixels with ReplaceValue1 that
   * are in the same watershed basin as Seed1 AND NOT the same as
   * Seed2. The filter adjusts the waterlevel until the two seeds are
   * not in different basins. The user supplies a Watershed
   * threshold. The algorithm uses a binary search to adjust the upper
   * waterlevel, starting at UpperValueLimit. UpperValueLimit defaults
   * to the 1.0.
   * \ingroup WatershedSegmentation
   * \ingroup ITKWatersheds
   */
  
  template< typename TInputImage, typename TOutputImage >
  class IsolatedWatershedImageFilter:
    public ImageToImageFilter< TInputImage, TOutputImage >
  {
  public:
    /** Standard class typedefs. */
    typedef IsolatedWatershedImageFilter                    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(IsolatedWatershedImageFilter,
                 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 InputImageType::SizeType     SizeType;
  
    typedef TOutputImage                         OutputImageType;
    typedef typename OutputImageType::Pointer    OutputImagePointer;
    typedef typename OutputImageType::RegionType OutputImageRegionType;
    typedef typename OutputImageType::PixelType  OutputImagePixelType;
  
    typedef typename NumericTraits<InputImagePixelType>::RealType      RealPixelType;
    typedef Image<RealPixelType, TInputImage::ImageDimension>          RealImageType;
  
    typedef WatershedImageFilter< RealImageType >                          WatershedType;
    typedef GradientMagnitudeImageFilter< InputImageType, RealImageType > GradientMagnitudeType;
    void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
  
    /** Set seed point 1. This seed will be isolated from Seed2 (if
     *  possible). All pixels connected to this seed will be replaced
     *  with ReplaceValue1. */
    itkSetMacro(Seed1, IndexType);
    itkGetConstMacro(Seed1, IndexType);
  
    /** Set seed point 2. This seed will be isolated from Seed1 (if
     *  possible). All pixels connected to this seed will be replaced
     *  with ReplaceValue2. */
    itkSetMacro(Seed2, IndexType);
    itkGetConstMacro(Seed2, IndexType);
  
    /** Set/Get the Watershed threshold. The default is 0. */
    itkSetMacro(Threshold, double);
    itkGetConstMacro(Threshold, double);
  
    /** Set/Get the precision required for the intensity threshold
     *  value. The default is .001. */
    itkSetMacro(IsolatedValueTolerance, double);
    itkGetConstMacro(IsolatedValueTolerance, double);
  
    /** Set/Get the limit on the upper waterlevel value. The default is
     *  1.0. */
    itkSetMacro(UpperValueLimit, double);
    itkGetConstMacro(UpperValueLimit, double);
  
    /** Set/Get value to replace Seed1(Seed2) pixels, pixels that are
     *  within the basin that contains Seed1(Seed2) this  value. The
     *  default is 1(0). */
    itkSetMacro(ReplaceValue1, OutputImagePixelType);
    itkGetConstMacro(ReplaceValue1, OutputImagePixelType);
    itkSetMacro(ReplaceValue2, OutputImagePixelType);
    itkGetConstMacro(ReplaceValue2, OutputImagePixelType);
  
    /** Get value that isolates the two seeds. */
    itkGetConstMacro(IsolatedValue, double);
  
  protected:
    IsolatedWatershedImageFilter();
    ~IsolatedWatershedImageFilter(){}
    IndexType m_Seed1;
    IndexType m_Seed2;
  
    OutputImagePixelType m_ReplaceValue1;
    OutputImagePixelType m_ReplaceValue2;
  
    typename GradientMagnitudeType::Pointer m_GradientMagnitude;
  
    typename WatershedType::Pointer m_Watershed;
  
    double m_Threshold;
    double m_IsolatedValue;
    double m_IsolatedValueTolerance;
    double m_UpperValueLimit;
  
    // 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:
    IsolatedWatershedImageFilter(const Self &); //purposely not implemented
    void operator=(const Self &);               //purposely not implemented
  };
  } // end namespace itk
  
  #ifndef ITK_MANUAL_INSTANTIATION
  #include "itkIsolatedWatershedImageFilter.hxx"
  #endif
  
  #endif
  