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 itkShapeLabelObjectAccessors_h
  #define itkShapeLabelObjectAccessors_h
  
  #include "itkLabelObjectAccessors.h"
  #include "itkIntTypes.h"
  
  /*
   *
   * This code was contributed in the Insight Journal paper:
   * "Label object representation and manipulation with ITK"
   * by Lehmann G.
   * https://hdl.handle.net/1926/584
   * http://www.insight-journal.org/browse/publication/176
   *
   */
  
  namespace itk
  {
  namespace Functor
  {
  template< typename TLabelObject >
  class NumberOfPixelsLabelObjectAccessor
  {
  public:
    typedef TLabelObject  LabelObjectType;
    typedef SizeValueType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetNumberOfPixels();
    }
  };
  
  template< typename TLabelObject >
  class BoundingBoxLabelObjectAccessor
  {
  public:
    typedef TLabelObject                         LabelObjectType;
    typedef typename LabelObjectType::RegionType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetBoundingBox();
    }
  };
  
  template< typename TLabelObject >
  class PhysicalSizeLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPhysicalSize();
    }
  };
  
  template< typename TLabelObject >
  class NumberOfPixelsOnBorderLabelObjectAccessor
  {
  public:
    typedef TLabelObject  LabelObjectType;
    typedef SizeValueType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetNumberOfPixelsOnBorder();
    }
  };
  
  template< typename TLabelObject >
  class PerimeterOnBorderLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPerimeterOnBorder();
    }
  };
  
  template< typename TLabelObject >
  class CentroidLabelObjectAccessor
  {
  public:
    typedef TLabelObject                           LabelObjectType;
    typedef typename LabelObjectType::CentroidType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetCentroid();
    }
  };
  
  template< typename TLabelObject >
  class FeretDiameterLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetFeretDiameter();
    }
  };
  
  template< typename TLabelObject >
  class PrincipalMomentsLabelObjectAccessor
  {
  public:
    typedef TLabelObject                         LabelObjectType;
    typedef typename LabelObjectType::VectorType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPrincipalMoments();
    }
  };
  
  template< typename TLabelObject >
  class PrincipalAxesLabelObjectAccessor
  {
  public:
    typedef TLabelObject                         LabelObjectType;
    typedef typename LabelObjectType::MatrixType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPrincipalAxes();
    }
  };
  
  template< typename TLabelObject >
  class ElongationLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetElongation();
    }
  };
  
  template< typename TLabelObject >
  class PerimeterLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPerimeter();
    }
  };
  
  template< typename TLabelObject >
  class RoundnessLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetRoundness();
    }
  };
  
  template< typename TLabelObject >
  class EquivalentSphericalRadiusLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetEquivalentSphericalRadius();
    }
  };
  
  template< typename TLabelObject >
  class EquivalentSphericalPerimeterLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetEquivalentSphericalPerimeter();
    }
  };
  
  template< typename TLabelObject >
  class EquivalentEllipsoidDiameterLabelObjectAccessor
  {
  public:
    typedef TLabelObject                         LabelObjectType;
    typedef typename LabelObjectType::VectorType AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetEquivalentEllipsoidDiameter();
    }
  };
  
  template< typename TLabelObject >
  class FlatnessLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetFlatness();
    }
  };
  
  template< typename TLabelObject >
  class PerimeterOnBorderRatioLabelObjectAccessor
  {
  public:
    typedef TLabelObject LabelObjectType;
    typedef double       AttributeValueType;
  
    inline AttributeValueType operator()(const LabelObjectType *labelObject) const
    {
      return labelObject->GetPerimeterOnBorderRatio();
    }
  };
  
  }
  } // end namespace itk
  
  #endif
  