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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 itkBinaryContourImageFilter_h
#define itkBinaryContourImageFilter_h
#include "itkInPlaceImageFilter.h"
#include "itkConceptChecking.h"
#include "itkBarrier.h"
#include <vector>
namespace itk
{
/**
* \class BinaryContourImageFilter
* \brief Labels the pixels on the border of the objects in a binary image.
*
* BinaryContourImageFilter takes a binary image as input, where the pixels
* in the objects are the pixels with a value equal to ForegroundValue.
* Only the pixels on the contours of the objects are kept. The pixels not
* on the border are changed to BackgroundValue.
*
* The connectivity can be changed to minimum or maximum connectivity with
* SetFullyConnected(). Full connectivity produces thicker contours.
*
* https://hdl.handle.net/1926/1352
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa LabelContourImageFilter BinaryErodeImageFilter SimpleContourExtractorImageFilter
* \ingroup ITKImageLabel
*
* \wiki
* \wikiexample{EdgesAndGradients/BinaryContourImageFilter,Extract the boundaries of connected regions in a binary image}
* \wikiexample{EdgesAndGradients/BinaryBoundaries,Extract the inner and outer boundaries of blobs in a binary image}
* \endwiki
*/
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT BinaryContourImageFilter:
public InPlaceImageFilter< TInputImage, TOutputImage >
{
public:
/**
* Standard "Self" & Superclass typedef.
*/
typedef BinaryContourImageFilter Self;
typedef InPlaceImageFilter< TInputImage, TOutputImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/**
* Run-time type information (and related methods)
*/
itkTypeMacro(BinaryContourImageFilter, ImageToImageFilter);
/**
* Method for creation through the object factory.
*/
itkNewMacro(Self);
/**
* Image typedef support
*/
typedef TInputImage InputImageType;
typedef typename InputImageType::Pointer InputImagePointer;
typedef typename InputImageType::ConstPointer InputImageConstPointer;
typedef typename InputImageType::IndexType IndexType;
typedef typename InputImageType::SizeType SizeType;
typedef typename InputImageType::OffsetType OffsetType;
typedef typename InputImageType::PixelType InputImagePixelType;
typedef typename InputImageType::InternalPixelType InputInternalPixelType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::RegionType RegionType;
typedef typename OutputImageType::IndexType OutputIndexType;
typedef typename OutputImageType::SizeType OutputSizeType;
typedef typename OutputImageType::OffsetType OutputOffsetType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
typedef typename OutputImageType::InternalPixelType OutputInternalPixelType;
itkStaticConstMacro(ImageDimension, unsigned int,
OutputImageType::ImageDimension);
#ifdef ITK_USE_CONCEPT_CHECKING
itkStaticConstMacro(InputImageDimension, unsigned int,
InputImageType::ImageDimension);
// Concept checking -- input and output dimensions must be the same
itkConceptMacro( SameDimension,
( Concept::SameDimension< itkGetStaticConstMacro(ImageDimension),
itkGetStaticConstMacro(OutputImageDimension) > ) );
#endif
/**
* 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);
/**
* Set/Get the background value used to mark the pixels not on the border of the
* objects.
*/
itkSetMacro(BackgroundValue, OutputImagePixelType);
itkGetConstMacro(BackgroundValue, OutputImagePixelType);
/**
* Set/Get the foreground value used to identify the objects in the input and
* output images.
*/
itkSetMacro(ForegroundValue, InputImagePixelType);
itkGetConstMacro(ForegroundValue, InputImagePixelType);
protected:
BinaryContourImageFilter();
virtual ~BinaryContourImageFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/**
* Standard pipeline methods.
*/
void BeforeThreadedGenerateData() ITK_OVERRIDE;
void AfterThreadedGenerateData() ITK_OVERRIDE;
void ThreadedGenerateData(const RegionType & outputRegionForThread,
ThreadIdType threadId) ITK_OVERRIDE;
/** BinaryContourImageFilter needs the entire input. Therefore
* it must provide an implementation GenerateInputRequestedRegion().
* \sa ProcessObject::GenerateInputRequestedRegion(). */
void GenerateInputRequestedRegion() ITK_OVERRIDE;
/** BinaryContourImageFilter will produce all of the output.
* Therefore it must provide an implementation of
* EnlargeOutputRequestedRegion().
* \sa ProcessObject::EnlargeOutputRequestedRegion() */
void EnlargeOutputRequestedRegion( DataObject * itkNotUsed(output) ) ITK_OVERRIDE;
private:
BinaryContourImageFilter(const Self &); //Purposefully not implemented
void operator = ( const Self &); //Purposefully not implemented
// types to support the run length encoding of lines
struct runLength
{
runLength( const OffsetValueType& iLength, const IndexType& iWhere ) :
m_Length( iLength ), m_Where( iWhere ) {}
// run length information - may be a more type safe way of doing this
OffsetValueType m_Length;
// Index of the start of the run
IndexType m_Where;
};
typedef std::vector< runLength > LineEncodingType;
typedef typename LineEncodingType::iterator LineEncodingIterator;
typedef typename LineEncodingType::const_iterator LineEncodingConstIterator;
// the map storing lines
typedef std::vector< LineEncodingType > LineMapType;
typedef std::vector< OffsetValueType > OffsetVec;
bool CheckNeighbors(const OutputIndexType & A,
const OutputIndexType & B);
void CompareLines(LineEncodingType & current,
const LineEncodingType & Neighbour);
void SetupLineOffsets(OffsetVec & LineOffsets);
void Wait();
Barrier::Pointer m_Barrier;
LineMapType m_ForegroundLineMap;
LineMapType m_BackgroundLineMap;
ThreadIdType m_NumberOfThreads;
InputImagePixelType m_ForegroundValue;
OutputImagePixelType m_BackgroundValue;
bool m_FullyConnected;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkBinaryContourImageFilter.hxx"
#endif
#endif
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