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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
{
/** \class ComputeImageExtremaFilter
* \brief Compute minimum and maximum pixel value of an Image.
*
* \ingroup MathematicalStatisticsImageFilters
* \ingroup ITKImageStatistics
*/
template <typename TInputImage>
class ITK_TEMPLATE_EXPORT ComputeImageExtremaFilter : public ImageSink<TInputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ComputeImageExtremaFilter);
/** Standard Self typedef */
using Self = ComputeImageExtremaFilter;
using Superclass = ImageSink<TInputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(ComputeImageExtremaFilter, StatisticsImageFilter);
/** Image related typedefs. */
using InputImagePointer = typename TInputImage::Pointer;
using Superclass::InputImageDimension;
using typename Superclass::InputImageRegionType;
using PixelType = typename Superclass::InputImagePixelType;
/** Image related typedefs. */
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;
/** Initialize minimum and maximum before the threads run. */
void
BeforeStreamedGenerateData() override;
/** Multi-thread version GenerateData. */
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
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