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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbPixelSuppressionByDirectionImageFilter_h
#define otbPixelSuppressionByDirectionImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkImage.h"
#include "itkNumericTraits.h"
namespace otb
{
/** \class PixelSuppressionByDirectionImageFilter
* \brief Application of a filter of suppression of isolated pixels,
* not belonging to a line, strating from the directions of pixels.
*
* This class implements an image filter which detects isolated pixels
* that have little chance of belonging to a raod and performs a pixel
* suppression. For each pixel kept with direction \f$ \theta_{i} \f$, we look
* for other pixels with a direction close to \f$ \theta_i \f$ in an angular
* beam around it. If none is found, the pixel is suppressed.
*
* This filter is the first step to generate an image of segments
* primitives. It starts from the two output images of the line detector
* image filters which are the image of intensity of detection and
* the image of direction.
*
*
* \ingroup OTBEdge
*/
template <class TInputImage, class TOutputImage>
class ITK_EXPORT PixelSuppressionByDirectionImageFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Extract input and output image dimensions */
itkStaticConstMacro(InputImageDimension, unsigned int, TInputImage::ImageDimension);
itkStaticConstMacro(OutputImageDimension, unsigned int, TOutputImage::ImageDimension);
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
/** typedef for the classes standards. */
typedef PixelSuppressionByDirectionImageFilter Self;
typedef itk::ImageToImageFilter<InputImageType, OutputImageType> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Method for management of the "object factory". */
itkNewMacro(Self);
/** Return the nale of the class. */
itkTypeMacro(PixelSuppressionByDirectionImageFilter, ImageToImageFilter);
/** Definition of the input and output images */
typedef typename InputImageType::PixelType InputPixelType;
typedef typename OutputImageType::PixelType OutputPixelType;
typedef typename itk::NumericTraits<InputPixelType>::RealType InputRealType;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename InputImageType::SizeType SizeType;
/** Set the radius of one zone. */
itkSetMacro(Radius, SizeType);
/** Get the radius of one zone. */
itkGetConstReferenceMacro(Radius, SizeType);
/** Set the angular beam. */
itkSetMacro(AngularBeam, InputRealType);
/** Get the angular beam. */
itkGetConstReferenceMacro(AngularBeam, InputRealType);
/** Set/Get the image input of this process object. */
void SetInputImage(const InputImageType* image);
const InputImageType* GetInputImage(void);
void SetInputImageDirection(const InputImageType* image);
const InputImageType* GetInputImageDirection(void);
void GenerateInputRequestedRegion() override;
protected:
PixelSuppressionByDirectionImageFilter();
~PixelSuppressionByDirectionImageFilter() override
{
}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
private:
PixelSuppressionByDirectionImageFilter(const Self&) = delete;
void operator=(const Self&) = delete;
// Radius of the region
SizeType m_Radius;
// Angular Accuracy on the direction of the central pixel
InputRealType m_AngularBeam;
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbPixelSuppressionByDirectionImageFilter.hxx"
#endif
#endif
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