itkUpdateShiSparseLevelSet.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 __itkUpdateShiSparseLevelSet_h
#define __itkUpdateShiSparseLevelSet_h

#include "itkImage.h"
#include "itkDiscreteLevelSetImageBase.h"
#include "itkShiSparseLevelSetImage.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkShapedNeighborhoodIterator.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkLabelMapToLabelImageFilter.h"
#include "itkLabelImageToLabelMapFilter.h"

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

  itkNewMacro( Self );

  itkTypeMacro( UpdateShiSparseLevelSet, Object );

  itkStaticConstMacro( ImageDimension, unsigned int, VDimension );

  typedef ShiSparseLevelSetImage< ImageDimension >     LevelSetType;
  typedef typename LevelSetType::Pointer               LevelSetPointer;
  typedef typename LevelSetType::InputType             LevelSetInputType;
  typedef typename LevelSetType::OutputType            LevelSetOutputType;

  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::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::TermContainerPointer  TermContainerPointer;

  itkGetObjectMacro( OutputLevelSet, LevelSetType );

  void Update();

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

  itkGetMacro( RMSChangeAccumulator, LevelSetOutputRealType );

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

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

protected:
  UpdateShiSparseLevelSet();
  virtual ~UpdateShiSparseLevelSet();

  // output
  LevelSetPointer   m_OutputLevelSet;

  IdentifierType           m_CurrentLevelSetId;
  LevelSetOutputRealType   m_RMSChangeAccumulator;
  EquationContainerPointer m_EquationContainer;

  typedef Image< int8_t, ImageDimension >   LabelImageType;
  typedef typename LabelImageType::Pointer  LabelImagePointer;

  LabelImagePointer m_InternalImage;

  typedef ShapedNeighborhoodIterator< LabelImageType > NeighborhoodIteratorType;

  // this is the same as Procedure 2
  // Input is a update image point m_UpdateImage
  // Input is also ShiSparseLevelSetImagePointer
  void UpdateLayerPlusOne();

  void UpdateLayerMinusOne();

  bool Con( const LevelSetInputType& iIdx,
            const LevelSetOutputType& iCurrentStatus,
            const LevelSetOutputRealType& iCurrentUpdate ) const;

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

  // input
  LevelSetPointer   m_InputLevelSet;

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

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

#endif // __itkUpdateShiSparseLevelSet_h