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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 itkSampleToSubsampleFilter_h
#define itkSampleToSubsampleFilter_h
#include "itkSubsample.h"
#include "itkProcessObject.h"
namespace itk
{
namespace Statistics
{
/** \class SampleToSubsampleFilter
* \brief Base class of filters intended to select subsamples from samples.
*
* This filter will take as input a Sample and produce as output a Subsample
* that derives from the original sample, and that refers to it.
*
* This is an Abstract class that can not be instantiated. There are multiple
* filters that derive from this class and provide specific implementations of
* subsampling methods.
*
* \sa Sample, Subsample
*
* \sa NeighborhoodSampler
*
* \ingroup ITKStatistics
*/
template <typename TSample>
class ITK_TEMPLATE_EXPORT SampleToSubsampleFilter : public ProcessObject
{
public:
ITK_DISALLOW_COPY_AND_MOVE(SampleToSubsampleFilter);
/** Standard class type aliases. */
using Self = SampleToSubsampleFilter;
using Superclass = ProcessObject;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(SampleToSubsampleFilter);
/** Typedefs for Measurement vector, measurement, Instance Identifier,
* frequency, size, size element value from the template argument TSample */
using SampleType = TSample;
using MeasurementVectorType = typename SampleType::MeasurementVectorType;
using MeasurementType = typename SampleType::MeasurementType;
using InstanceIdentifier = typename SampleType::InstanceIdentifier;
/** Declare the output type */
using SubsampleType = Subsample<SampleType>;
using OutputType = SubsampleType;
/** Set/Get the input sample */
using Superclass::SetInput;
virtual void
SetInput(const SampleType * sample);
virtual const SampleType *
GetInput() const;
/** Get the output subsample */
const OutputType *
GetOutput() const;
protected:
SampleToSubsampleFilter();
~SampleToSubsampleFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
/** Make a DataObject of the correct type to used as the specified
* output. This method
* is automatically called when DataObject::DisconnectPipeline() is
* called.
* \sa ProcessObject
*/
using DataObjectPointerArraySizeType = ProcessObject::DataObjectPointerArraySizeType;
using Superclass::MakeOutput;
DataObjectPointer
MakeOutput(DataObjectPointerArraySizeType idx) override;
}; // end of class
} // end of namespace Statistics
} // end of namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkSampleToSubsampleFilter.hxx"
#endif
#endif
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