itkScalarRegionBasedLevelSetFunction.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 __itkScalarRegionBasedLevelSetFunction_h
#define __itkScalarRegionBasedLevelSetFunction_h

#include "itkRegionBasedLevelSetFunction.h"
#include "itkNeighborhoodIterator.h"
#include "itkImageRegionConstIterator.h"
#include "itkImageRegionIteratorWithIndex.h"

namespace itk
{
template< typename TInputImage, typename TFeatureImage, typename TSharedData >
class ScalarRegionBasedLevelSetFunction:
  public RegionBasedLevelSetFunction< TInputImage, TFeatureImage, TSharedData >
{
public:
  typedef ScalarRegionBasedLevelSetFunction                                      Self;
  typedef RegionBasedLevelSetFunction< TInputImage, TFeatureImage, TSharedData > Superclass;
  typedef SmartPointer< Self >                                                   Pointer;
  typedef SmartPointer< const Self >                                             ConstPointer;

  // itkNewMacro() is purposely not provided since this is an abstract class.

  itkTypeMacro(ScalarRegionBasedLevelSetFunction, RegionBasedLevelSetFunction);

  itkStaticConstMacro(ImageDimension, unsigned int, TFeatureImage::ImageDimension);

  typedef typename Superclass::InputImageType         InputImageType;
  typedef typename Superclass::InputImageConstPointer InputImageConstPointer;
  typedef typename Superclass::InputImagePointer      InputImagePointer;
  typedef typename Superclass::InputPixelType         InputPixelType;
  typedef typename Superclass::InputIndexType         InputIndexType;
  typedef typename Superclass::InputIndexValueType    InputIndexValueType;
  typedef typename Superclass::InputSizeType          InputSizeType;
  typedef typename Superclass::InputSizeValueType     InputSizeValueType;
  typedef typename Superclass::InputRegionType        InputRegionType;
  typedef typename Superclass::InputPointType         InputPointType;

  typedef typename Superclass::FeatureImageType   FeatureImageType;
  typedef typename FeatureImageType::ConstPointer FeatureImageConstPointer;
  typedef typename Superclass::FeaturePixelType   FeaturePixelType;
  typedef typename Superclass::FeatureIndexType   FeatureIndexType;
  typedef typename Superclass::FeatureOffsetType  FeatureOffsetType;

  typedef typename Superclass::ScalarValueType  ScalarValueType;
  typedef typename Superclass::NeighborhoodType NeighborhoodType;
  typedef typename Superclass::FloatOffsetType  FloatOffsetType;
  typedef typename Superclass::RadiusType       RadiusType;
  typedef typename Superclass::TimeStepType     TimeStepType;
  typedef typename Superclass::GlobalDataStruct GlobalDataStruct;
  typedef typename Superclass::PixelType        PixelType;
  typedef typename Superclass::VectorType       VectorType;

  typedef typename Superclass::SharedDataType    SharedDataType;
  typedef typename Superclass::SharedDataPointer SharedDataPointer;

  typedef ImageRegionIteratorWithIndex< InputImageType >      ImageIteratorType;
  typedef ImageRegionConstIteratorWithIndex< InputImageType > ConstImageIteratorType;
  typedef ImageRegionIteratorWithIndex< FeatureImageType >    FeatureImageIteratorType;
  typedef ImageRegionConstIterator< FeatureImageType >        ConstFeatureIteratorType;

  typedef std::list< unsigned int >              ListPixelType;
  typedef typename ListPixelType::const_iterator ListPixelConstIterator;
  typedef typename ListPixelType::iterator       ListPixelIterator;
  typedef Image< ListPixelType, itkGetStaticConstMacro(ImageDimension) >
  ListImageType;

  void UpdatePixel(const unsigned int & idx,
                   NeighborhoodIterator< TInputImage > & iterator,
                   InputPixelType & newValue,
                   bool & status);

protected:
  ScalarRegionBasedLevelSetFunction():Superclass(){}
  ~ScalarRegionBasedLevelSetFunction(){}

  ScalarValueType ComputeOverlapParameters(const FeatureIndexType & featIndex,
                                           ScalarValueType & product);

  // update the background and foreground constants for pixel updates
  // Called only when sparse filters are used to prevent iteration through the
  // entire image
  virtual void UpdateSharedDataInsideParameters(const unsigned int & iId,
                                                const FeaturePixelType & iVal, const ScalarValueType & iChange) = 0;

  virtual void UpdateSharedDataOutsideParameters(const unsigned int & iId,
                                                 const FeaturePixelType & iVal, const ScalarValueType & iChange) = 0;

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

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

#endif