itkLabelStatisticsKeepNObjectsImageFilter.h

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/*=========================================================================
 *
 *  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 itkLabelStatisticsKeepNObjectsImageFilter_h
#define itkLabelStatisticsKeepNObjectsImageFilter_h

#include "itkLabelImageToLabelMapFilter.h"
#include "itkStatisticsLabelMapFilter.h"
#include "itkStatisticsKeepNObjectsLabelMapFilter.h"
#include "itkLabelMapToLabelImageFilter.h"

namespace itk
{
template< typename TInputImage, typename TFeatureImage >
class ITK_TEMPLATE_EXPORT LabelStatisticsKeepNObjectsImageFilter:
  public ImageToImageFilter< TInputImage, TInputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(LabelStatisticsKeepNObjectsImageFilter);

  using Self = LabelStatisticsKeepNObjectsImageFilter;
  using Superclass = ImageToImageFilter< TInputImage, TInputImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using InputImageType = TInputImage;
  using OutputImageType = TInputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using InputImageConstPointer = typename InputImageType::ConstPointer;
  using InputImageRegionType = typename InputImageType::RegionType;
  using InputImagePixelType = typename InputImageType::PixelType;
  using OutputImagePointer = typename OutputImageType::Pointer;
  using OutputImageConstPointer = typename OutputImageType::ConstPointer;
  using OutputImageRegionType = typename OutputImageType::RegionType;
  using OutputImagePixelType = typename OutputImageType::PixelType;

  using FeatureImageType = TFeatureImage;
  using FeatureImagePointer = typename FeatureImageType::Pointer;
  using FeatureImageConstPointer = typename FeatureImageType::ConstPointer;
  using FeatureImagePixelType = typename FeatureImageType::PixelType;

  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;

  using LabelObjectType = StatisticsLabelObject< InputImagePixelType, Self::ImageDimension >;
  using LabelMapType = LabelMap< LabelObjectType >;
  using LabelizerType = LabelImageToLabelMapFilter< InputImageType, LabelMapType >;
  using LabelObjectValuatorType = StatisticsLabelMapFilter< LabelMapType, TFeatureImage >;
  using AttributeType = typename LabelObjectType::AttributeType;
  using KeepNObjectsType = StatisticsKeepNObjectsLabelMapFilter< LabelMapType >;
  using BinarizerType = LabelMapToLabelImageFilter< LabelMapType, OutputImageType >;

  itkNewMacro(Self);

  itkTypeMacro(LabelStatisticsKeepNObjectsImageFilter,
               ImageToImageFilter);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( InputEqualityComparableCheck,
                   ( Concept::EqualityComparable< InputImagePixelType > ) );
  itkConceptMacro( IntConvertibleToInputCheck,
                   ( Concept::Convertible< int, InputImagePixelType > ) );
  itkConceptMacro( InputOStreamWritableCheck,
                   ( Concept::OStreamWritable< InputImagePixelType > ) );
  // End concept checking
#endif

  itkSetMacro(BackgroundValue, OutputImagePixelType);
  itkGetConstMacro(BackgroundValue, OutputImagePixelType);

  itkGetConstMacro(NumberOfObjects, SizeValueType);
  itkSetMacro(NumberOfObjects, SizeValueType);

  itkGetConstMacro(ReverseOrdering, bool);
  itkSetMacro(ReverseOrdering, bool);
  itkBooleanMacro(ReverseOrdering);

  itkGetConstMacro(Attribute, AttributeType);
  itkSetMacro(Attribute, AttributeType);
  void SetAttribute(const std::string & s)
  {
    this->SetAttribute( LabelObjectType::GetAttributeFromName(s) );
  }

  void SetFeatureImage(const TFeatureImage *input)
  {
    // Process object is not const-correct so the const casting is required.
    this->SetNthInput( 1, const_cast< TFeatureImage * >( input ) );
  }

  const FeatureImageType * GetFeatureImage()
  {
    return static_cast< const FeatureImageType * >( this->ProcessObject::GetInput(1) );
  }

  void SetInput1(const InputImageType *input)
  {
    this->SetInput(input);
  }

  void SetInput2(const FeatureImageType *input)
  {
    this->SetFeatureImage(input);
  }

protected:
  LabelStatisticsKeepNObjectsImageFilter();
  ~LabelStatisticsKeepNObjectsImageFilter() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  void GenerateInputRequestedRegion() override;

  void EnlargeOutputRequestedRegion( DataObject *itkNotUsed(output) ) override;

  void GenerateData() override;

private:
  OutputImagePixelType m_BackgroundValue;
  SizeValueType        m_NumberOfObjects;
  bool                 m_ReverseOrdering;
  AttributeType        m_Attribute;
}; // end of class
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLabelStatisticsKeepNObjectsImageFilter.hxx"
#endif

#endif