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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
|
/*=========================================================================
*
* 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 itkDerivativeImageFilter_h
#define itkDerivativeImageFilter_h
#include "itkImageToImageFilter.h"
namespace itk
{
/**
* \class DerivativeImageFilter
* \brief Computes the directional derivative of an image.
* The directional derivative at each pixel location is computed by convolution
* with a derivative operator of user-specified order.
*
* SetOrder specifies the order of the derivative.
*
* SetDirection specifies the direction of the derivative with respect to the
* coordinate axes of the image.
*
* \sa Image
* \sa Neighborhood
* \sa NeighborhoodOperator
* \sa NeighborhoodIterator
*
* \ingroup ImageFeatureExtraction
* \ingroup ITKImageFeature
*
* \sphinx
* \sphinxexample{Filtering/ImageFeature/DerivativeImage,Apply A Filter Only To A Specified Region Of An Image}
* \sphinxexample{Filtering/ImageFeature/RequestedRegion,Apply A Filter Only To A Specified Region Of An Image}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT DerivativeImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(DerivativeImageFilter);
/** Standard class type aliases. */
using Self = DerivativeImageFilter;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Extract some information from the image types. Dimensionality
* of the two images is assumed to be the same. */
using OutputPixelType = typename TOutputImage::PixelType;
using OutputInternalPixelType = typename TOutputImage::InternalPixelType;
using InputPixelType = typename TInputImage::PixelType;
using InputInternalPixelType = typename TInputImage::InternalPixelType;
/** Extract some information from the image types. Dimensionality
* of the two images is assumed to be the same. */
static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;
/** Image type alias support */
using InputImageType = TInputImage;
using OutputImageType = TOutputImage;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(DerivativeImageFilter);
/** The output pixel type must be signed. */
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(SignedOutputPixelType, (Concept::Signed<OutputPixelType>));
// End concept checking
#endif
/** Standard get/set macros for filter parameters. */
itkSetMacro(Order, unsigned int);
itkGetConstMacro(Order, unsigned int);
itkSetMacro(Direction, unsigned int);
itkGetConstMacro(Direction, unsigned int);
/** Set/Get whether or not the filter will use the spacing of the input
* image in its calculations. Use On to compute the derivatives in physical
* space; use Off to ignore the image spacing and to compute the derivatives
* in isotropic voxel space. Default is On. */
itkSetMacro(UseImageSpacing, bool);
itkGetConstMacro(UseImageSpacing, bool);
itkBooleanMacro(UseImageSpacing);
#if !defined(ITK_FUTURE_LEGACY_REMOVE)
/** Use the image spacing information in calculations. Use this option if you
* want derivatives in physical space. Default is UseImageSpacingOn. */
void
SetUseImageSpacingOn()
{
this->SetUseImageSpacing(true);
}
/** Ignore the image spacing. Use this option if you want derivatives in
isotropic pixel space. Default is UseImageSpacingOn. */
void
SetUseImageSpacingOff()
{
this->SetUseImageSpacing(false);
}
#endif
/** DerivativeImageFilter needs a larger input requested region than
* the output requested region (larger in the direction of the
* derivative). As such, DerivativeImageFilter needs to provide an
* implementation for GenerateInputRequestedRegion() in order to
* inform the pipeline execution model.
*
* \sa ImageToImageFilter::GenerateInputRequestedRegion() */
void
GenerateInputRequestedRegion() override;
protected:
DerivativeImageFilter()
{
m_Order = 1;
m_Direction = 0;
m_UseImageSpacing = true;
}
~DerivativeImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
/** Standard pipeline method. While this class does not implement a
* ThreadedGenerateData(), its GenerateData() delegates all
* calculations to an NeighborhoodOperatorImageFilter. Since the
* NeighborhoodOperatorImageFilter is multithreaded, this filter is
* multithreaded by default. */
void
GenerateData() override;
private:
/** The order of the derivative. */
unsigned int m_Order{};
/** The direction of the derivative. */
unsigned int m_Direction{};
bool m_UseImageSpacing{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkDerivativeImageFilter.hxx"
#endif
#endif
|