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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 itkLabelContourImageFilter_h
#define itkLabelContourImageFilter_h
#include "itkInPlaceImageFilter.h"
#include "itkScanlineFilterCommon.h"
#include <vector>
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.
*
* https://www.insight-journal.org/browse/publication/217
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa BinaryContourImageFilter
*
* \ingroup ITKImageLabel
*
* \sphinx
* \sphinxexample{Filtering/ImageLabel/LabelContoursOfConnectComponent,Label Contours Of Connect Components}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT LabelContourImageFilter
: public InPlaceImageFilter<TInputImage, TOutputImage>
, protected ScanlineFilterCommon<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(LabelContourImageFilter);
/**
* Standard "Self" & Superclass typedef.
*/
using Self = LabelContourImageFilter;
using Superclass = InPlaceImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using Superclass::Register;
using Superclass::UnRegister;
/**
* Method for creation through the object factory.
*/
itkNewMacro(Self);
/**
* Run-time type information (and related methods)
*/
itkOverrideGetNameOfClassMacro(LabelContourImageFilter);
static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;
/**
* Image type alias support
*/
using InputImageType = TInputImage;
using InputImagePointer = typename InputImageType::Pointer;
using InputIndexType = typename InputImageType::IndexType;
using InputSizeType = typename InputImageType::SizeType;
using InputOffsetType = typename InputImageType::OffsetType;
using InputImagePixelType = typename InputImageType::PixelType;
using OffsetValueType = typename InputImageType::OffsetValueType;
using InputPixelType = typename InputImageType::PixelType;
using OutputImageType = TOutputImage;
using OutputImagePointer = typename OutputImageType::Pointer;
using OutputRegionType = typename OutputImageType::RegionType;
using OutputIndexType = typename OutputImageType::IndexType;
using OutputSizeType = typename OutputImageType::SizeType;
using OutputOffsetType = typename OutputImageType::OffsetType;
using OutputImagePixelType = typename OutputImageType::PixelType;
/**
* Set/Get whether the connected components are defined strictly by
* face connectivity or by face+edge+vertex connectivity. Default is
* FullyConnectedOff.
* \note For objects that are 1 pixel wide, use FullyConnectedOn.
*/
itkSetMacro(FullyConnected, bool);
itkGetConstReferenceMacro(FullyConnected, bool);
itkBooleanMacro(FullyConnected);
/**
* 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();
~LabelContourImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
void
GenerateData() override;
void
BeforeThreadedGenerateData() override;
void
AfterThreadedGenerateData() override;
void
DynamicThreadedGenerateData(const OutputRegionType & outputRegionForThread) override;
void
ThreadedIntegrateData(const OutputRegionType & outputRegionForThread);
/** LabelContourImageFilter needs the entire input. Therefore
* it must provide an implementation GenerateInputRequestedRegion().
* \sa ProcessObject::GenerateInputRequestedRegion(). */
void
GenerateInputRequestedRegion() override;
/** LabelContourImageFilter will produce all of the output.
* Therefore it must provide an implementation of
* EnlargeOutputRequestedRegion().
* \sa ProcessObject::EnlargeOutputRequestedRegion() */
void
EnlargeOutputRequestedRegion(DataObject * itkNotUsed(output)) override;
using ScanlineFunctions = ScanlineFilterCommon<TInputImage, TOutputImage>;
using InternalLabelType = typename ScanlineFunctions::InternalLabelType;
using OutSizeType = typename ScanlineFunctions::OutSizeType;
using RunLength = typename ScanlineFunctions::RunLength;
using LineEncodingType = typename ScanlineFunctions::LineEncodingType;
using LineEncodingIterator = typename ScanlineFunctions::LineEncodingIterator;
using LineEncodingConstIterator = typename ScanlineFunctions::LineEncodingConstIterator;
using OffsetVectorType = typename ScanlineFunctions::OffsetVectorType;
using OffsetVectorConstIterator = typename ScanlineFunctions::OffsetVectorConstIterator;
using LineMapType = typename ScanlineFunctions::LineMapType;
using UnionFindType = typename ScanlineFunctions::UnionFindType;
using ConsecutiveVectorType = typename ScanlineFunctions::ConsecutiveVectorType;
private:
OutputImagePixelType m_BackgroundValue{};
LineMapType m_LineMap{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkLabelContourImageFilter.hxx"
#endif
#endif
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