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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 itkImageToHistogramFilter_h
#define itkImageToHistogramFilter_h
#include "itkHistogram.h"
#include "itkImageTransformer.h"
#include "itkBarrier.h"
#include "itkSimpleDataObjectDecorator.h"
#include "itkProgressReporter.h"
namespace itk
{
namespace Statistics
{
/** \class ImageToHistogramFilter
* \brief This class generates an histogram from an image.
*
* The concept of Histogram in ITK is quite generic. It has been designed to
* manage multiple components data. This class facilitates the computation of
* an histogram from an image. Internally it creates a List that is feed into
* the SampleToHistogramFilter.
*
* \ingroup ITKStatistics
*/
template< typename TImage >
class ITK_TEMPLATE_EXPORT ImageToHistogramFilter:public ImageTransformer<TImage>
{
public:
/** Standard typedefs */
typedef ImageToHistogramFilter Self;
typedef ImageTransformer<TImage> Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(ImageToHistogramFilter, ImageTransformer);
/** standard New() method support */
itkNewMacro(Self);
typedef TImage ImageType;
typedef typename ImageType::PixelType PixelType;
typedef typename ImageType::RegionType RegionType;
typedef typename NumericTraits< PixelType >::ValueType ValueType;
typedef typename NumericTraits< ValueType >::RealType ValueRealType;
typedef Histogram< ValueRealType > HistogramType;
typedef typename HistogramType::Pointer HistogramPointer;
typedef typename HistogramType::ConstPointer HistogramConstPointer;
typedef typename HistogramType::SizeType HistogramSizeType;
typedef typename HistogramType::MeasurementType HistogramMeasurementType;
typedef typename HistogramType::MeasurementVectorType HistogramMeasurementVectorType;
public:
/** Return the output histogram. */
const HistogramType * GetOutput() const;
HistogramType * GetOutput();
/** Type of DataObjects to use for Size inputs */
typedef SimpleDataObjectDecorator<
HistogramSizeType > InputHistogramSizeObjectType;
/** Type of DataObjects to use for Marginal Scale inputs */
typedef SimpleDataObjectDecorator<
HistogramMeasurementType > InputHistogramMeasurementObjectType;
/** Type of DataObjects to use for Minimum and Maximums values of the
* histogram bins. */
typedef SimpleDataObjectDecorator<
HistogramMeasurementVectorType > InputHistogramMeasurementVectorObjectType;
/** Type of DataObjects to use for AutoMinimumMaximum input */
typedef SimpleDataObjectDecorator< bool > InputBooleanObjectType;
/** Methods for setting and getting the histogram size. The histogram size
* is encapsulated inside a decorator class. For this reason, it is possible
* to set and get the decorator class, but it is only possible to set the
* histogram size by value. This macro declares the methods
* SetHistogramSize(), SetHistogramSizeInput(), GetHistogramSizeInput().
*/
itkSetGetDecoratedInputMacro(HistogramSize, HistogramSizeType);
/** Methods for setting and getting the Marginal scale value. The marginal
* scale is used when the type of the measurement vector componets are of
* integer type. */
itkSetGetDecoratedInputMacro(MarginalScale, HistogramMeasurementType);
/** Methods for setting and getting the Minimum and Maximum values of the
* histogram bins. */
itkSetGetDecoratedInputMacro(HistogramBinMinimum, HistogramMeasurementVectorType);
itkSetGetDecoratedInputMacro(HistogramBinMaximum, HistogramMeasurementVectorType);
/** Methods for setting and getting the boolean flag that defines whether the
* minimum and maximum of the histogram are going to be computed
* automatically from the values of the sample */
itkSetGetDecoratedInputMacro(AutoMinimumMaximum, bool);
/** Method that facilitates the use of this filter in the internal
* pipeline of another filter. */
virtual void GraftOutput(DataObject *output);
protected:
ImageToHistogramFilter();
virtual ~ImageToHistogramFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
void BeforeThreadedGenerateData(void) ITK_OVERRIDE;
void ThreadedGenerateData(const RegionType & inputRegionForThread, ThreadIdType threadId) ITK_OVERRIDE;
void AfterThreadedGenerateData(void) ITK_OVERRIDE;
/** Method that construct the outputs */
typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
using Superclass::MakeOutput;
DataObject::Pointer MakeOutput(DataObjectPointerArraySizeType) ITK_OVERRIDE;
virtual void ThreadedComputeMinimumAndMaximum( const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress );
virtual void ThreadedComputeHistogram( const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress );
std::vector< HistogramPointer > m_Histograms;
std::vector< HistogramMeasurementVectorType > m_Minimums;
std::vector< HistogramMeasurementVectorType > m_Maximums;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ImageToHistogramFilter);
void ApplyMarginalScale( HistogramMeasurementVectorType & min, HistogramMeasurementVectorType & max, HistogramSizeType & size );
typename Barrier::Pointer m_Barrier;
};
} // end of namespace Statistics
} // end of namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageToHistogramFilter.hxx"
#endif
#endif
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