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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 itkLaplacianSharpeningImageFilter_h
#define itkLaplacianSharpeningImageFilter_h
#include "itkNumericTraits.h"
#include "itkImageToImageFilter.h"
namespace itk
{
/**
* \class LaplacianSharpeningImageFilter
* \brief This filter sharpens an image using a Laplacian.
* LaplacianSharpening highlights regions of rapid intensity change
* and therefore highlights or enhances the edges. The result is an
* image that appears more in focus.
*
* \par The LaplacianSharpening at each pixel location is computed by
* convolution with the itk::LaplacianOperator.
*
* \par Inputs and Outputs
* The input to this filter is a scalar-valued itk::Image of arbitrary
* dimension. The output is a scalar-valued itk::Image.
* \sa Image
* \sa Neighborhood
* \sa NeighborhoodOperator
* \sa NeighborhoodIterator
* \sa LaplacianOperator
*
* \ingroup ImageFeatureExtraction
* \ingroup ITKImageFeature
*
* \wiki
* \wikiexample{ImageProcessing/LaplacianSharpeningImageFilter,Sharpen an image}
* \endwiki
*/
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT LaplacianSharpeningImageFilter:
public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
/** Standard "Self" & Superclass typedef. */
typedef LaplacianSharpeningImageFilter Self;
typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
/** Extract some information from the image types. Dimensionality
* of the two images is assumed to be the same. */
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TOutputImage::InternalPixelType OutputInternalPixelType;
typedef typename NumericTraits< OutputPixelType >::RealType RealType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TInputImage::InternalPixelType InputInternalPixelType;
itkStaticConstMacro(ImageDimension, unsigned int,
TOutputImage::ImageDimension);
/** Image typedef support. */
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef typename InputImageType::Pointer InputImagePointer;
/** Smart pointer typedef support. */
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods) */
itkTypeMacro(LaplacianSharpeningImageFilter, ImageToImageFilter);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** LaplacianSharpeningImageFilter needs a larger input requested
* region than the output requested region (larger in the direction
* of the derivative). As such, LaplacianSharpeningImageFilter
* needs to provide an implementation for
* GenerateInputRequestedRegion() in order to inform the pipeline
* execution model.
*
* \sa ImageToImageFilter::GenerateInputRequestedRegion() */
virtual void GenerateInputRequestedRegion() ITK_OVERRIDE;
/** Enable/Disable using the image spacing information in
* calculations. Use this option if you want derivatives in
* physical space. Default is UseImageSpacingOn. */
itkBooleanMacro( UseImageSpacing );
/** Set/Get whether or not the filter will use the spacing of the input
image in its calculations */
itkSetMacro(UseImageSpacing, bool);
itkGetConstMacro(UseImageSpacing, bool);
protected:
LaplacianSharpeningImageFilter()
{
m_UseImageSpacing = true;
}
virtual ~LaplacianSharpeningImageFilter() ITK_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() ITK_OVERRIDE;
void PrintSelf(std::ostream &, Indent) const ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(LaplacianSharpeningImageFilter);
bool m_UseImageSpacing;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLaplacianSharpeningImageFilter.hxx"
#endif
#endif
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