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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkLabelContourImageFilter.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkLabelContourImageFilter_h
#define __itkLabelContourImageFilter_h
#include "itkInPlaceImageFilter.h"
#include "itkImage.h"
#include "itkConceptChecking.h"
#include <vector>
#include <map>
#include "itkProgressReporter.h"
#include "itkBarrier.h"
namespace itk
{
/**
* \class LabelContourImageFilter
* \brief Labels the pixels on the border of the objects in a labeled image.
*
* LabelContourImageFilter takes a labeled image as input, where the pixels in the
* objects are the pixels with a value different of the BackgroundValue. Only the pixels
* on the contours of the objects are kept. The pixels not on the border are changed
* to BackgroundValue. The labels of the object are the same in the input and in the
* output image.
*
* The connectivity can be changed to minimum or maximum connectivity with
* SetFullyConnected(). Full connectivity produces thicker contours.
*
* http://hdl.handle.net/1926/1352
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa BinaryContourImageFilter
*/
template <class TInputImage, class TOutputImage>
class ITK_EXPORT LabelContourImageFilter :
public InPlaceImageFilter< TInputImage, TOutputImage >
{
public:
/**
* Standard "Self" & Superclass typedef.
*/
typedef LabelContourImageFilter Self;
typedef InPlaceImageFilter< TInputImage, TOutputImage > Superclass;
/**
* Types from the Superclass
*/
typedef typename Superclass::InputImagePointer InputImagePointer;
/**
* Extract some information from the image types. Dimensionality
* of the two images is assumed to be the same.
*/
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TOutputImage::InternalPixelType OutputInternalPixelType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TInputImage::InternalPixelType InputInternalPixelType;
itkStaticConstMacro(ImageDimension, unsigned int,
TOutputImage::ImageDimension);
itkStaticConstMacro(OutputImageDimension, unsigned int,
TOutputImage::ImageDimension);
itkStaticConstMacro(InputImageDimension, unsigned int,
TInputImage::ImageDimension);
/**
* Image typedef support
*/
typedef TInputImage InputImageType;
typedef typename TInputImage::IndexType IndexType;
typedef typename TInputImage::SizeType SizeType;
typedef typename TInputImage::OffsetType OffsetType;
typedef typename TInputImage::PixelType InputImagePixelType;
typedef typename TInputImage::SizeValueType SizeValueType;
typedef typename TInputImage::OffsetValueType OffsetValueType;
typedef TOutputImage OutputImageType;
typedef typename TOutputImage::RegionType RegionType;
typedef typename TOutputImage::IndexType OutputIndexType;
typedef typename TOutputImage::SizeType OutputSizeType;
typedef typename TOutputImage::OffsetType OutputOffsetType;
typedef typename TOutputImage::PixelType OutputImagePixelType;
typedef std::list<IndexType> ListType;
/**
* Smart pointer typedef support
*/
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/**
* Run-time type information (and related methods)
*/
itkTypeMacro(LabelContourImageFilter, ImageToImageFilter);
/**
* Method for creation through the object factory.
*/
itkNewMacro(Self);
/**
* Set/Get whether the connected components are defined strictly by
* face connectivity or by face+edge+vertex connectivity. Default is
* FullyConnectedOff. For objects that are 1 pixel wide, use
* FullyConnectedOn.
*/
itkSetMacro(FullyConnected, bool);
itkGetConstReferenceMacro(FullyConnected, bool);
itkBooleanMacro(FullyConnected);
// Concept checking -- input and output dimensions must be the same
itkConceptMacro(SameDimension,
(Concept::SameDimension<itkGetStaticConstMacro(InputImageDimension),
itkGetStaticConstMacro(OutputImageDimension)>));
/**
* Set/Get the background value used to identify the objects and mark the
* pixels not on the border of the objects.
*/
itkSetMacro(BackgroundValue, OutputImagePixelType);
itkGetConstMacro(BackgroundValue, OutputImagePixelType);
protected:
LabelContourImageFilter()
{
m_FullyConnected = false;
m_BackgroundValue = NumericTraits< OutputImagePixelType >::Zero;
m_NumberOfThreads = 0;
this->SetInPlace( false );
}
virtual ~LabelContourImageFilter() {}
LabelContourImageFilter(const Self&) {}
void PrintSelf(std::ostream& os, Indent indent) const;
/**
* Standard pipeline methods.
*/
void BeforeThreadedGenerateData ();
void AfterThreadedGenerateData ();
void ThreadedGenerateData (const RegionType& outputRegionForThread, int threadId);
/** LabelContourImageFilter needs the entire input. Therefore
* it must provide an implementation GenerateInputRequestedRegion().
* \sa ProcessObject::GenerateInputRequestedRegion(). */
void GenerateInputRequestedRegion();
/** LabelContourImageFilter will produce all of the output.
* Therefore it must provide an implementation of
* EnlargeOutputRequestedRegion().
* \sa ProcessObject::EnlargeOutputRequestedRegion() */
void EnlargeOutputRequestedRegion(DataObject *itkNotUsed(output));
private:
OutputImagePixelType m_BackgroundValue;
bool m_FullyConnected;
// some additional types
typedef typename TOutputImage::RegionType::SizeType OutSizeType;
// types to support the run length encoding of lines
class runLength
{
public:
// run length information - may be a more type safe way of doing this
long int length;
typename InputImageType::IndexType where; // Index of the start of the run
InputImagePixelType label;
};
typedef std::vector<runLength> lineEncoding;
// the map storing lines
typedef std::vector<lineEncoding> LineMapType;
typedef std::vector<long> OffsetVec;
// the types to support union-find operations
typedef std::vector<unsigned long int> UnionFindType;
bool CheckNeighbors(const OutputIndexType &A,
const OutputIndexType &B);
void CompareLines(lineEncoding ¤t, const lineEncoding &Neighbour);
void SetupLineOffsets(OffsetVec &LineOffsets);
void Wait()
{
if( m_NumberOfThreads > 1 )
{
m_Barrier->Wait();
}
}
typename Barrier::Pointer m_Barrier;
LineMapType m_LineMap;
long m_NumberOfThreads;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLabelContourImageFilter.txx"
#endif
#endif
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