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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 itkShiftScaleImageFilter_h
#define itkShiftScaleImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkArray.h"
#include <mutex>
namespace itk
{
/** \class ShiftScaleImageFilter
* \brief Shift and scale the pixels in an image.
*
* ShiftScaleImageFilter shifts the input pixel by Shift (default 0.0)
* and then scales the pixel by Scale (default 1.0). All computations
* are performed in the precision of the input pixel's RealType. Before
* assigning the computed value to the output pixel, the value is clamped
* at the NonpositiveMin and max of the pixel type.
* \ingroup IntensityImageFilters
*
* \ingroup ITKImageIntensity
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT ShiftScaleImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ShiftScaleImageFilter);
/** Standard class type aliases. */
using Self = ShiftScaleImageFilter;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Typedef to describe the output and input image region types. */
using InputImageRegionType = typename TInputImage::RegionType;
using OutputImageRegionType = typename TOutputImage::RegionType;
/** Typedef to describe the pointer to the input/output. */
using InputImagePointer = typename TInputImage::Pointer;
using OutputImagePointer = typename TOutputImage::Pointer;
/** Typedef to describe the type of pixel. */
using InputImagePixelType = typename TInputImage::PixelType;
using OutputImagePixelType = typename TOutputImage::PixelType;
/** Typedef to describe the output and input image index and size types. */
using InputImageIndexType = typename TInputImage::IndexType;
using InputImageSizeType = typename TInputImage::SizeType;
using InputImageOffsetType = typename TInputImage::OffsetType;
using OutputImageIndexType = typename TOutputImage::IndexType;
using OutputImageSizeType = typename TOutputImage::SizeType;
using OutputImageOffsetType = typename TOutputImage::OffsetType;
/** Type to use form computations. */
using RealType = typename NumericTraits<OutputImagePixelType>::RealType;
/** Image related type alias. */
static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(ShiftScaleImageFilter);
/** Set/Get the amount to Shift each Pixel. The shift is followed by a Scale.
*/
itkSetMacro(Shift, RealType);
itkGetConstMacro(Shift, RealType);
/** Set/Get the amount to Scale each Pixel. The Scale is applied after the
Shift. */
itkSetMacro(Scale, RealType);
itkGetConstMacro(Scale, RealType);
/** Get the number of pixels that underflowed and overflowed. */
itkGetConstMacro(UnderflowCount, SizeValueType);
itkGetConstMacro(OverflowCount, SizeValueType);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(OutputHasNumericTraitsCheck, (Concept::HasNumericTraits<OutputImagePixelType>));
itkConceptMacro(InputPlusRealTypeCheck, (Concept::AdditiveOperators<InputImagePixelType, RealType, RealType>));
itkConceptMacro(RealTypeMultiplyOperatorCheck, (Concept::MultiplyOperator<RealType>));
// End concept checking
#endif
protected:
ShiftScaleImageFilter() = default;
~ShiftScaleImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
/** Initialize some accumulators before the threads run. */
void
BeforeThreadedGenerateData() override;
void
DynamicThreadedGenerateData(const OutputImageRegionType &) override;
private:
RealType m_Shift{};
RealType m_Scale{ NumericTraits<RealType>::OneValue() };
SizeValueType m_UnderflowCount{ 0 };
SizeValueType m_OverflowCount{ 0 };
std::mutex m_Mutex{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkShiftScaleImageFilter.hxx"
#endif
#endif
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