itkRegionBasedLevelSetFunctionData.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 itkRegionBasedLevelSetFunctionData_h
#define itkRegionBasedLevelSetFunctionData_h

#include "itkLightObject.h"

#include "itkVector.h"
#include "itkListSample.h"
#include "itkKdTreeGenerator.h"

#include "itkImageRegionIterator.h"
#include "itkImageRegionIteratorWithIndex.h"

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

  using Self = RegionBasedLevelSetFunctionData;
  using Superclass = LightObject;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  static constexpr unsigned int ImageDimension = TFeatureImage::ImageDimension;

  itkNewMacro(Self);

  itkTypeMacro(RegionBasedLevelSetFunctionData, LightObject);

  using InputImageType = TInputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using InputImageConstPointer = typename InputImageType::ConstPointer;
  using InputPixelType = typename InputImageType::PixelType;
  using InputRegionType = typename InputImageType::RegionType;
  using InputSizeType = typename InputImageType::SizeType;
  using InputSizeValueType = typename InputSizeType::SizeValueType;
  using InputSpacingType = typename InputImageType::SpacingType;
  using InputIndexType = typename InputImageType::IndexType;
  using InputIndexValueType = typename InputIndexType::IndexValueType;
  using InputPointType = typename InputImageType::PointType;

  using FeatureImageType = TFeatureImage;
  using FeatureImagePointer = typename FeatureImageType::Pointer;
  using FeatureImageConstPointer = typename FeatureImageType::ConstPointer;
  using FeaturePixelType = typename FeatureImageType::PixelType;
  using FeatureRegionType = typename FeatureImageType::RegionType;
  using FeatureSizeType = typename FeatureImageType::SizeType;
  using FeatureSizeValueType = typename FeatureSizeType::SizeValueType;
  using FeatureSpacingType = typename FeatureImageType::SpacingType;
  using FeatureIndexType = typename FeatureImageType::IndexType;
  using FeaturePointType = typename FeatureImageType::PointType;

  // Allocates m_HeavisideFunctionOfLevelSetImage to have same origin,
  // spacing and size as image. Also sets the m_Start and m_End indices.
  void CreateHeavisideFunctionOfLevelSetImage(const InputImageType *image);

  // Checks if the given index lies in the domain of the current
  // level-set function. The domain is defined by the start and end indices.
  template< typename TIndex >
  bool VerifyInsideRegion(const TIndex & featureIndex)
  {
    for ( unsigned int j = 0; j < ImageDimension; j++ )
      {
      if ( ( featureIndex[j] < static_cast< InputIndexValueType >( this->m_Start[j] ) )
           || ( featureIndex[j] > static_cast< InputIndexValueType >( this->m_End[j] ) ) )
        {
        return false;
        }
      }
    return true;
  }

  // Get the index into the domain of the current level-set function
  InputIndexType GetIndex(const FeatureIndexType & featureIndex);

  // Get the index in the domain of the feature image
  FeatureIndexType GetFeatureIndex(const InputIndexType & inputIndex);

  double m_WeightedNumberOfPixelsInsideLevelSet;
  double m_WeightedNumberOfPixelsOutsideLevelSet;

  InputImagePointer m_HeavisideFunctionOfLevelSetImage;
  InputIndexType    m_Start;
  InputIndexType    m_End;

protected:
  RegionBasedLevelSetFunctionData();
  ~RegionBasedLevelSetFunctionData() override {}
};
} //end namespace itk

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