itkUpdateWhitakerSparseLevelSet.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 __itkUpdateWhitakerSparseLevelSet_h
#define __itkUpdateWhitakerSparseLevelSet_h

#include "itkImage.h"
#include "itkDiscreteLevelSetImage.h"
#include "itkWhitakerSparseLevelSetImage.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkShapedNeighborhoodIterator.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkLabelMapToLabelImageFilter.h"
#include "itkLabelImageToLabelMapFilter.h"

namespace itk
{
template< unsigned int VDimension,
          typename TLevelSetValueType,
          class TEquationContainer >
class UpdateWhitakerSparseLevelSet : public Object
{
public:
  typedef UpdateWhitakerSparseLevelSet  Self;
  typedef SmartPointer< Self >          Pointer;
  typedef SmartPointer< const Self >    ConstPointer;
  typedef Object                        Superclass;

  itkNewMacro( Self );

  itkTypeMacro( UpdateWhitakerSparseLevelSet, Object );

  itkStaticConstMacro( ImageDimension, unsigned int, VDimension );

  typedef TLevelSetValueType  LevelSetOutputType;

  typedef WhitakerSparseLevelSetImage< LevelSetOutputType, ImageDimension >
                                                       LevelSetType;
  typedef typename LevelSetType::Pointer               LevelSetPointer;
  typedef typename LevelSetType::InputType             LevelSetInputType;

  typedef typename LevelSetType::LabelMapType          LevelSetLabelMapType;
  typedef typename LevelSetType::LabelMapPointer       LevelSetLabelMapPointer;

  typedef typename LevelSetType::LabelObjectType       LevelSetLabelObjectType;
  typedef typename LevelSetType::LabelObjectPointer    LevelSetLabelObjectPointer;
  typedef typename LevelSetType::LabelObjectLengthType LevelSetLabelObjectLengthType;
  typedef typename LevelSetType::LabelObjectLineType   LevelSetLabelObjectLineType;

  typedef typename LevelSetType::LayerIdType           LevelSetLayerIdType;
  typedef typename LevelSetType::LayerType             LevelSetLayerType;
  typedef typename LevelSetType::LayerIterator         LevelSetLayerIterator;
  typedef typename LevelSetType::LayerConstIterator    LevelSetLayerConstIterator;
  typedef typename LevelSetType::OutputRealType        LevelSetOutputRealType;

  typedef typename LevelSetType::LayerMapType           LevelSetLayerMapType;
  typedef typename LevelSetType::LayerMapIterator       LevelSetLayerMapIterator;
  typedef typename LevelSetType::LayerMapConstIterator  LevelSetLayerMapConstIterator;

  typedef TEquationContainer                      EquationContainerType;
  typedef typename EquationContainerType::Pointer EquationContainerPointer;

  typedef typename EquationContainerType::TermContainerType     TermContainerType;
  typedef typename EquationContainerType::TermContainerPointer  TermContainerPointer;

  typedef Image< LevelSetLayerIdType, ImageDimension >  LabelImageType;
  typedef typename LabelImageType::Pointer              LabelImagePointer;

  typedef LabelMapToLabelImageFilter< LevelSetLabelMapType, LabelImageType >  LabelMapToLabelImageFilterType;
  typedef LabelImageToLabelMapFilter< LabelImageType, LevelSetLabelMapType >  LabelImageToLabelMapFilterType;

  itkGetObjectMacro( OutputLevelSet, LevelSetType );

  void Update();

  itkSetObjectMacro( InputLevelSet, LevelSetType );
  itkGetObjectMacro( InputLevelSet, LevelSetType );

  itkSetMacro( TimeStep, LevelSetOutputType );
  itkGetMacro( TimeStep, LevelSetOutputType );

  itkGetMacro( RMSChangeAccumulator, LevelSetOutputType );

  itkSetObjectMacro( EquationContainer, EquationContainerType );
  itkGetObjectMacro( EquationContainer, EquationContainerType );

  itkSetMacro( CurrentLevelSetId, IdentifierType );
  itkGetMacro( CurrentLevelSetId, IdentifierType );

  void SetUpdate( const LevelSetLayerType& iUpdate );


protected:
  UpdateWhitakerSparseLevelSet();
  virtual ~UpdateWhitakerSparseLevelSet();

  void UpdateLayerZero();

  void UpdateLayerMinus1();

  void UpdateLayerPlus1();

  void UpdateLayerMinus2();

  void UpdateLayerPlus2();

  void MovePointIntoZeroLevelSet();

  void MovePointFromMinus1();

  void MovePointFromPlus1();

  void MovePointFromMinus2();

  void MovePointFromPlus2();

private:
  UpdateWhitakerSparseLevelSet( const Self& ); // purposely not implemented
  void operator = ( const Self& );  // purposely not implemented

  LevelSetOutputType m_TimeStep;
  LevelSetOutputType m_RMSChangeAccumulator;
  IdentifierType     m_CurrentLevelSetId;

  EquationContainerPointer m_EquationContainer;

  LevelSetLayerType  m_Update;
  LevelSetPointer    m_InputLevelSet;
  LevelSetPointer    m_OutputLevelSet;

  LevelSetPointer   m_TempLevelSet;
  LevelSetLayerType m_TempPhi;

  LevelSetLayerIdType m_MinStatus;
  LevelSetLayerIdType m_MaxStatus;

  LabelImagePointer m_InternalImage;

  typedef ShapedNeighborhoodIterator< LabelImageType > NeighborhoodIteratorType;

  typedef std::pair< LevelSetInputType, LevelSetOutputType > NodePairType;
};
}

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkUpdateWhitakerSparseLevelSet.hxx"
#endif
#endif // __itkUpdateWhitakerSparseLevelSet_h