1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
|
/*=========================================================================
*
* 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 itkMeanImageFunction_h
#define itkMeanImageFunction_h
#include "itkImageFunction.h"
#include "itkImageNeighborhoodOffsets.h"
#include "itkNumericTraits.h"
#include "itkOffset.h"
#include <vector>
namespace itk
{
/**
* \class MeanImageFunction
* \brief Calculate the mean value in the neighborhood of a pixel
*
* Calculate the mean pixel value over the standard 8, 26, etc. connected
* neighborhood. This calculation uses a ZeroFluxNeumannBoundaryCondition.
*
* If called with a ContinuousIndex or Point, the calculation is performed
* at the nearest neighbor.
*
* This class is templated over the input image type and the
* coordinate representation type (e.g. float or double).
*
* \sa VectorMeanImageFunction
*
* \ingroup ImageFunctions
* \ingroup ITKImageFunction
*/
template <typename TInputImage, typename TCoordRep = float>
class ITK_TEMPLATE_EXPORT MeanImageFunction
: public ImageFunction<TInputImage, typename NumericTraits<typename TInputImage::PixelType>::RealType, TCoordRep>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(MeanImageFunction);
/** Standard class type aliases. */
using Self = MeanImageFunction;
using Superclass =
ImageFunction<TInputImage, typename NumericTraits<typename TInputImage::PixelType>::RealType, TCoordRep>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(MeanImageFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** InputImageType type alias support */
using InputImageType = TInputImage;
/** InputPixel type alias support */
using typename Superclass::InputPixelType;
/** OutputType typedef support. */
using typename Superclass::OutputType;
/** Index type alias support */
using typename Superclass::IndexType;
/** ContinuousIndex type alias support */
using typename Superclass::ContinuousIndexType;
/** Point type alias support */
using typename Superclass::PointType;
/** Size type of the underlying image. */
using ImageSizeType = typename InputImageType::SizeType;
/** Dimension of the underlying image. */
static constexpr unsigned int ImageDimension = InputImageType::ImageDimension;
/** Datatype used for the mean */
using RealType = typename NumericTraits<typename InputImageType::PixelType>::RealType;
/** Evaluate the function at specified index */
RealType
EvaluateAtIndex(const IndexType & index) const override;
/** Evaluate the function at non-integer positions */
RealType
Evaluate(const PointType & point) const override
{
IndexType index;
this->ConvertPointToNearestIndex(point, index);
return this->EvaluateAtIndex(index);
}
RealType
EvaluateAtContinuousIndex(const ContinuousIndexType & cindex) const override
{
IndexType index;
this->ConvertContinuousIndexToNearestIndex(cindex, index);
return this->EvaluateAtIndex(index);
}
/** Get/Set the radius of the neighborhood over which the
statistics are evaluated */
void
SetNeighborhoodRadius(unsigned int);
itkGetConstReferenceMacro(NeighborhoodRadius, unsigned int);
protected:
MeanImageFunction();
~MeanImageFunction() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
unsigned int m_NeighborhoodRadius{ 1 };
std::vector<Offset<ImageDimension>> m_NeighborhoodOffsets{ GenerateRectangularImageNeighborhoodOffsets(
ImageSizeType::Filled(1)) };
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkMeanImageFunction.hxx"
#endif
#endif
|