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 itkImageShapeModelEstimatorBase_h
  #define itkImageShapeModelEstimatorBase_h
  
  #include "itkImageToImageFilter.h"
  
  namespace itk
  {
  /** \class ImageShapeModelEstimatorBase
   * \brief Base class for statistical shape model estimation.
   *
   * itkImageShapeModelEstimatorBase is the base class for the
   * ImageShapeModelEstimator objects. It provides the basic function
   * definitions that are inherent to a ImageShapeModelEstimator objects.
   *
   * This is the Superclass for the ImageShapeModelEstimator
   * framework. This is an abstract class defining an interface for all
   * such objects available through the ImageShapeModelEstimator
   * framework in the ITK toolkit.
   *
   * The basic functionality of the ImageShapeModelEstimator framework
   * base class is to generate the ShapeModels. It requires input image
   * to be provided by the user. EstimateShapeModels() is a pure virtual
   * function making this an abstract class. Classes deriving from this
   * class are required to implement the EstimateShapeModels function.
   *
   *  \ingroup ImageFeatureExtraction
   * \ingroup ITKImageStatistics
   */
  
  template< typename TInputImage,
            typename TOutputImage = Image< double, TInputImage::ImageDimension > >
  class ITK_TEMPLATE_EXPORT ImageShapeModelEstimatorBase:
    public ImageToImageFilter< TInputImage, TOutputImage >
  {
  public:
    ITK_DISALLOW_COPY_AND_ASSIGN(ImageShapeModelEstimatorBase);
  
    /** Standard class type aliases. */
    using Self = ImageShapeModelEstimatorBase;
    using Superclass = ImageToImageFilter< TInputImage, TOutputImage >;
    using Pointer = SmartPointer< Self >;
    using ConstPointer = SmartPointer< const Self >;
  
    /** Run-time type information (and related methods). */
    itkTypeMacro(ImageShapeModelEstimatorBase, ImageToImageFilter);
  
    /** Type definitions for the training image. */
    using InputImageType = TInputImage;
    using InputImagePointer = typename TInputImage::Pointer;
  
  protected:
    ImageShapeModelEstimatorBase();
    ~ImageShapeModelEstimatorBase() override;
    void PrintSelf(std::ostream & os, Indent indent) const override;
  
    void GenerateData() override;
  
  private:
  
    /**Container for holding the training image */
    InputImagePointer m_InputImage;
  
    /** The core virtual function to perform ShapeModelling of the input data */
    virtual void EstimateShapeModels() = 0;
  }; // class ImageShapeModelEstimator
  } // namespace itk
  
  #ifndef ITK_MANUAL_INSTANTIATION
  #include "itkImageShapeModelEstimatorBase.hxx"
  #endif
  
  #endif
  