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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 itkCropImageFilter_h
#define itkCropImageFilter_h
#include "itkExtractImageFilter.h"
namespace itk
{
/**
* \class CropImageFilter
* \brief Decrease the image size by cropping the image by an itk::Size at
* both the upper and lower bounds of the largest possible region.
*
* CropImageFilter changes the image boundary of an image by removing
* pixels outside the target region. The target region is not specified in
* advance, but calculated in BeforeThreadedGenerateData().
*
* This filter uses ExtractImageFilter to perform the cropping.
*
* \ingroup GeometricTransform
* \ingroup ITKImageGrid
*
* \sphinx
* \sphinxexample{Filtering/ImageGrid/CropImageBySpecifyingRegion2,Crop Image By Specifying Region}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT CropImageFilter : public ExtractImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(CropImageFilter);
/** Standard class type aliases. */
using Self = CropImageFilter;
using Superclass = ExtractImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(CropImageFilter);
/** Typedef to describe the output and input image region types. */
using typename Superclass::OutputImageRegionType;
using typename Superclass::InputImageRegionType;
/** Typedef to describe the type of pixel. */
using typename Superclass::OutputImagePixelType;
using typename Superclass::InputImagePixelType;
/** Typedef to describe the output and input image index and size types. */
using typename Superclass::OutputImageIndexType;
using typename Superclass::InputImageIndexType;
using typename Superclass::OutputImageSizeType;
using typename Superclass::InputImageSizeType;
using SizeType = InputImageSizeType;
/** ImageDimension constants. */
static constexpr unsigned int InputImageDimension = Superclass::InputImageDimension;
static constexpr unsigned int OutputImageDimension = Superclass::OutputImageDimension;
/** Set/Get the cropping sizes for the upper and lower boundaries. */
itkSetMacro(UpperBoundaryCropSize, SizeType);
itkGetConstMacro(UpperBoundaryCropSize, SizeType);
itkSetMacro(LowerBoundaryCropSize, SizeType);
itkGetConstMacro(LowerBoundaryCropSize, SizeType);
void
SetBoundaryCropSize(const SizeType & s)
{
this->SetUpperBoundaryCropSize(s);
this->SetLowerBoundaryCropSize(s);
}
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(InputConvertibleToOutputCheck, (Concept::Convertible<InputImagePixelType, OutputImagePixelType>));
itkConceptMacro(SameDimensionCheck, (Concept::SameDimension<InputImageDimension, OutputImageDimension>));
// End concept checking
#endif
protected:
CropImageFilter()
{
this->SetDirectionCollapseToSubmatrix();
m_UpperBoundaryCropSize.Fill(0);
m_LowerBoundaryCropSize.Fill(0);
}
~CropImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
void
GenerateOutputInformation() override;
void
VerifyInputInformation() ITKv5_CONST override;
private:
SizeType m_UpperBoundaryCropSize{};
SizeType m_LowerBoundaryCropSize{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkCropImageFilter.hxx"
#endif
#endif
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