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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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkLabelMapFilter_h
#define itkLabelMapFilter_h
#include "itkImageToImageFilter.h"
#include <mutex>
namespace itk
{
/**
* \class LabelMapFilter
* \brief Base class for filters that take an image as input and overwrite that image as the output
*
* LabelMapFilter is the base class for all process objects whose
* are using a LabelMapFilter as input. It manage several threads,
* and run a method ThreadedGenerateData() for each object in the LabelMapFilter.
* With that class, the developer doesn't need to take care of iterating over all the objects in
* the image, or to manage by hand the threads.
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* This implementation was taken from the Insight Journal paper:
* https://www.insight-journal.org/browse/publication/176
*
* \sa LabelMapToBinaryImageFilter, LabelMapToLabelImageFilter
* \ingroup ImageEnhancement MathematicalMorphologyImageFilters
* \ingroup LabeledImageFilters
* \ingroup ITKLabelMap
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT LabelMapFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(LabelMapFilter);
/** Standard class type aliases. */
using Self = LabelMapFilter;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(LabelMapFilter);
/** Standard New method. */
itkNewMacro(Self);
/** Some convenient type alias. */
using typename Superclass::InputImageType;
using typename Superclass::InputImagePointer;
using typename Superclass::InputImageConstPointer;
using typename Superclass::InputImageRegionType;
using typename Superclass::InputImagePixelType;
using LabelObjectType = typename InputImageType::LabelObjectType;
using OutputImageType = TOutputImage;
using OutputImagePointer = typename OutputImageType::Pointer;
using OutputImageConstPointer = typename OutputImageType::ConstPointer;
using OutputImageRegionType = typename OutputImageType::RegionType;
using OutputImagePixelType = typename OutputImageType::PixelType;
/** ImageDimension constants */
static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
/** LabelMapFilter requires the entire input to be
* available. Thus, it needs to provide an implementation of
* GenerateInputRequestedRegion(). */
void
GenerateInputRequestedRegion() override;
/** LabelMapFilter will produce the entire output. */
void
EnlargeOutputRequestedRegion(DataObject * itkNotUsed(output)) override;
protected:
LabelMapFilter();
~LabelMapFilter() override = default;
void
BeforeThreadedGenerateData() override;
void
AfterThreadedGenerateData() override;
void
DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;
// derived classes call this as inherited so we must delegate to DynamicThreadedGenerateData
void
ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread, ThreadIdType) override
{
Self::DynamicThreadedGenerateData(outputRegionForThread);
}
virtual void
ThreadedProcessLabelObject(LabelObjectType * labelObject);
/**
* Return the label collection image to use. This method may be overloaded
* if the label collection image to use is not the input image.
*/
virtual InputImageType *
GetLabelMap()
{
return static_cast<InputImageType *>(const_cast<DataObject *>(this->ProcessObject::GetInput(0)));
}
std::mutex m_LabelObjectContainerLock{};
private:
typename InputImageType::Iterator m_LabelObjectIterator{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkLabelMapFilter.hxx"
#endif
#endif
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