itkComputeImageExtremaFilter.h

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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 itkComputeImageExtremaFilter_h
#define itkComputeImageExtremaFilter_h
 
#include "itkImageSink.h"
#include "itkImageMaskSpatialObject.h"
 
namespace itk
{
template <typename TInputImage>
class ITK_TEMPLATE_EXPORT ComputeImageExtremaFilter : public ImageSink<TInputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(ComputeImageExtremaFilter);
 
  using Self = ComputeImageExtremaFilter;
  using Superclass = ImageSink<TInputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkTypeMacro(ComputeImageExtremaFilter, StatisticsImageFilter);
 
  using InputImagePointer = typename TInputImage::Pointer;
 
  using Superclass::InputImageDimension;
  using typename Superclass::InputImageRegionType;
  using PixelType = typename Superclass::InputImagePixelType;
 
  itkStaticConstMacro(ImageDimension, unsigned int, TInputImage::ImageDimension);
 
  using ImageSpatialMaskType = ImageMaskSpatialObject<Self::ImageDimension>;
  using ImageSpatialMaskPointer = typename ImageSpatialMaskType::Pointer;
  using ImageSpatialMaskConstPointer = typename ImageSpatialMaskType::ConstPointer;
  itkSetConstObjectMacro(ImageSpatialMask, ImageSpatialMaskType);
  itkGetConstObjectMacro(ImageSpatialMask, ImageSpatialMaskType);
 
  PixelType
  GetMinimum() const
  {
    return m_ThreadMin;
  }
 
  PixelType
  GetMaximum() const
  {
    return m_ThreadMax;
  }
 
protected:
  ComputeImageExtremaFilter() = default;
  ~ComputeImageExtremaFilter() override = default;
 
  void
  BeforeStreamedGenerateData() override;
 
  void
  ThreadedStreamedGenerateData(const InputImageRegionType &) override;
 
private:
  struct MinMaxResult
  {
    PixelType Min;
    PixelType Max;
  };
 
  static MinMaxResult
  RetrieveMinMax(const TInputImage &, const InputImageRegionType &, const ImageSpatialMaskType *, bool);
 
  ImageSpatialMaskConstPointer m_ImageSpatialMask{};
  bool                         m_SameGeometry{ false };
 
  PixelType m_ThreadMin{ 1 };
  PixelType m_ThreadMax{ 1 };
 
  std::mutex m_Mutex{};
}; // end of class
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkComputeImageExtremaFilter.hxx"
#endif
 
#endif