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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 itkIsolatedWatershedImageFilter_h
#define itkIsolatedWatershedImageFilter_h
#include "itkWatershedImageFilter.h"
#include "itkGradientMagnitudeImageFilter.h"
namespace itk
{
/** \class IsolatedWatershedImageFilter
* \brief Isolate watershed basins using two seeds
*
* IsolatedWatershedImageFilter labels pixels with ReplaceValue1 that
* are in the same watershed basin as Seed1 AND NOT the same as
* Seed2. The filter adjusts the waterlevel until the two seeds are
* not in different basins. The user supplies a Watershed
* threshold. The algorithm uses a binary search to adjust the upper
* waterlevel, starting at UpperValueLimit. UpperValueLimit defaults
* to the 1.0.
* \ingroup WatershedSegmentation
* \ingroup ITKWatersheds
*/
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT IsolatedWatershedImageFilter:
public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
/** Standard class typedefs. */
typedef IsolatedWatershedImageFilter Self;
typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(IsolatedWatershedImageFilter,
ImageToImageFilter);
typedef TInputImage InputImageType;
typedef typename InputImageType::Pointer InputImagePointer;
typedef typename InputImageType::ConstPointer InputImageConstPointer;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename InputImageType::PixelType InputImagePixelType;
typedef typename InputImageType::IndexType IndexType;
typedef typename InputImageType::SizeType SizeType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
typedef typename NumericTraits<InputImagePixelType>::RealType RealPixelType;
typedef Image<RealPixelType, TInputImage::ImageDimension> RealImageType;
typedef WatershedImageFilter< RealImageType > WatershedType;
typedef GradientMagnitudeImageFilter< InputImageType, RealImageType > GradientMagnitudeType;
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** Set seed point 1. This seed will be isolated from Seed2 (if
* possible). All pixels connected to this seed will be replaced
* with ReplaceValue1. */
itkSetMacro(Seed1, IndexType);
itkGetConstMacro(Seed1, IndexType);
/** Set seed point 2. This seed will be isolated from Seed1 (if
* possible). All pixels connected to this seed will be replaced
* with ReplaceValue2. */
itkSetMacro(Seed2, IndexType);
itkGetConstMacro(Seed2, IndexType);
/** Set/Get the Watershed threshold. The default is 0. */
itkSetMacro(Threshold, double);
itkGetConstMacro(Threshold, double);
/** Set/Get the precision required for the intensity threshold
* value. The default is .001. */
itkSetMacro(IsolatedValueTolerance, double);
itkGetConstMacro(IsolatedValueTolerance, double);
/** Set/Get the limit on the upper waterlevel value. The default is
* 1.0. */
itkSetMacro(UpperValueLimit, double);
itkGetConstMacro(UpperValueLimit, double);
/** Set/Get value to replace Seed1(Seed2) pixels, pixels that are
* within the basin that contains Seed1(Seed2) this value. The
* default is 1(0). */
itkSetMacro(ReplaceValue1, OutputImagePixelType);
itkGetConstMacro(ReplaceValue1, OutputImagePixelType);
itkSetMacro(ReplaceValue2, OutputImagePixelType);
itkGetConstMacro(ReplaceValue2, OutputImagePixelType);
/** Get value that isolates the two seeds. */
itkGetConstMacro(IsolatedValue, double);
protected:
IsolatedWatershedImageFilter();
~IsolatedWatershedImageFilter() ITK_OVERRIDE {}
IndexType m_Seed1;
IndexType m_Seed2;
OutputImagePixelType m_ReplaceValue1;
OutputImagePixelType m_ReplaceValue2;
typename GradientMagnitudeType::Pointer m_GradientMagnitude;
typename WatershedType::Pointer m_Watershed;
double m_Threshold;
double m_IsolatedValue;
double m_IsolatedValueTolerance;
double m_UpperValueLimit;
// Override since the filter needs all the data for the algorithm
void GenerateInputRequestedRegion() ITK_OVERRIDE;
// Override since the filter produces the entire dataset
void EnlargeOutputRequestedRegion(DataObject *output) ITK_OVERRIDE;
void VerifyInputInformation() ITK_OVERRIDE;
void GenerateData() ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(IsolatedWatershedImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkIsolatedWatershedImageFilter.hxx"
#endif
#endif
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