/usr/include/ITK-4.5/itkSparseImage.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
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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 __itkSparseImage_h
#define __itkSparseImage_h
#include "itkImage.h"
#include "itkSparseFieldLayer.h"
#include "itkObjectStore.h"
namespace itk
{
/**
* \class SparseImage
*
* \brief A storage type for sparse image data.
*
* \par
* This class is derived from the Image class. It uses the base class image
* data for storing pointers to variables of type TNode. The node type must
* have a member variable m_Index. The node data is
* stored using the SparseFieldLayer and ObjectStore classes to allow
* sequential list access to the nodes. This functionality is used in filter
* classes that process the SparseImage class such as
* FiniteDifferenceSparseImageFilter. The node type must also have members
* NodeType* Next and NodeType* Previous. A minimal node class which could
* be used to create the sparse equivalent of an itk::Image<unsigned char, 2>
* is shown below:
*
* \code
* struct NodeType
* {
* NodeType* Next;
* NodeType* Previous;
* ImageType::IndexType m_Index;
* unsigned char m_Data;
* };
* typedef itk::SparseImage<NodeType, 2> SparseImageType;
* \endcode
*
* \par
* This class provides the method AddNode which allocates a node variable,
* associates it with the image pixel index (sets m_Index in the node variable)
* and returns the pointer to the node variable. It is suggested that the user
* call the FillBuffer method to initialize the image to null pointers before
* any calls to AddNode. This would allow the user later to distinguish between
* valid and non-valid pixels.
*
* \ingroup ITKCommon
*/
template< typename TNode, unsigned int VImageDimension = 2 >
class SparseImage:public Image< TNode *, VImageDimension >
{
public:
/** Standard typedefs. */
typedef SparseImage Self;
typedef Image< TNode *, VImageDimension > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef WeakPointer< const Self > ConstWeakPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(SparseImage, Image);
/** Dimension of the image. */
itkStaticConstMacro(ImageDimension, unsigned int,
Superclass::ImageDimension);
/** The actual sparse pixel type. */
typedef TNode NodeType;
/** Types derived from the Superclass */
typedef typename Superclass::IndexType IndexType;
/** Tyepdef for the functor used to access a neighborhood of pixel
* pointers. */
typedef NeighborhoodAccessorFunctor< Self >
NeighborhoodAccessorFunctorType;
typedef typename Superclass::IOPixelType IOPixelType;
/** The list types for storing the active pixels. */
typedef SparseFieldLayer< NodeType > NodeListType;
typedef ObjectStore< NodeType > NodeStoreType;
/** Return the NeighborhoodAccessor functor. This method is called by the
* neighborhood iterators. */
NeighborhoodAccessorFunctorType GetNeighborhoodAccessor()
{ return NeighborhoodAccessorFunctorType(); }
/** Return the NeighborhoodAccessor functor. This method is called by the
* neighborhood iterators. */
const NeighborhoodAccessorFunctorType GetNeighborhoodAccessor() const
{ return NeighborhoodAccessorFunctorType(); }
/** This function should be used to allocate memory for a variable at the
desired pixel location. */
NodeType * AddNode(const IndexType & index)
{
m_NodeList->PushFront( m_NodeStore->Borrow() );
NodeType *node = m_NodeList->Front();
node->m_Index = index;
this->SetPixel(index, node);
return node;
}
/** This function returns the allocated node list which can be used to
iterate through the valid nodes. */
NodeListType * GetNodeList()
{
return m_NodeList;
}
/** This function initializes the m_NodeList and m_NodeStore variables, and
calls the superclass Initialize method. */
virtual void Initialize();
protected:
SparseImage();
~SparseImage() {}
void PrintSelf(std::ostream & os, Indent indent) const;
private:
/** The variables for storing the node variables. */
typename NodeListType::Pointer m_NodeList;
typename NodeStoreType::Pointer m_NodeStore;
SparseImage(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkSparseImage.hxx"
#endif
#endif
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