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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkImageClassifierFilter.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkImageClassifierFilter_h
#define __itkImageClassifierFilter_h
#include <vector>
#include "itkMembershipFunctionBase.h"
#include "itkDecisionRule.h"
#include "itkImageToImageFilter.h"
#include "itkSimpleDataObjectDecorator.h"
namespace itk {
namespace Statistics {
/** \class ImageClassifierFilter
*
* \brief Image classification class
*
* This filter takes input image, membership functions,
* decision rule and produces as output image with each pixel labeled
* according to the classification result.
*
* This class is templated over the type of input and output image and
* sample type.
*
* \sa SampleClassifierFilter
*/
template< class TSample, class TInputImage, class TOutputImage >
class ITK_EXPORT ImageClassifierFilter :
public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Standard class typedef */
typedef ImageClassifierFilter Self;
typedef ImageToImageFilter<TInputImage,TOutputImage> Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Standard macros */
itkTypeMacro(ImageClassifierFilter, ImageToImagefilter);
itkNewMacro(Self);
/** Image pixel value typedef. */
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
/** Image related typedefs. */
typedef typename TInputImage::Pointer InputImagePointer;
typedef typename TOutputImage::Pointer OutputImagePointer;
typedef typename TInputImage::SizeType InputSizeType;
typedef typename TInputImage::IndexType InputIndexType;
typedef typename TInputImage::RegionType InputImageRegionType;
typedef typename TOutputImage::SizeType OutputSizeType;
typedef typename TOutputImage::IndexType OutputIndexType;
typedef typename TOutputImage::RegionType OutputImageRegionType;
/** Image related typedefs. */
itkStaticConstMacro(InputImageDimension, unsigned int,
TInputImage::ImageDimension );
itkStaticConstMacro(OutputImageDimension, unsigned int,
TOutputImage::ImageDimension );
/** Type of the input Sample */
typedef TSample SampleType;
/** typedefs from SampleType object */
typedef typename SampleType::MeasurementType MeasurementType;
typedef typename SampleType::MeasurementVectorType MeasurementVectorType;
/** typedef for the MembershipFunction */
typedef MembershipFunctionBase< MeasurementVectorType > MembershipFunctionType;
typedef typename MembershipFunctionType::ConstPointer MembershipFunctionPointer;
typedef std::vector< MembershipFunctionPointer > MembershipFunctionVectorType;
typedef SimpleDataObjectDecorator<
MembershipFunctionVectorType > MembershipFunctionVectorObjectType;
typedef typename
MembershipFunctionVectorObjectType::Pointer MembershipFunctionVectorObjectPointer;
/** typedef for membership functions weight proprtion */
typedef Array< double > MembershipFunctionsWeightsArrayType;
typedef SimpleDataObjectDecorator<
MembershipFunctionsWeightsArrayType > MembershipFunctionsWeightsArrayObjectType;
typedef typename
MembershipFunctionsWeightsArrayObjectType::Pointer MembershipFunctionsWeightsArrayPointer;
/** typedef for class label type */
typedef unsigned long ClassLabelType;
typedef std::vector< ClassLabelType > ClassLabelVectorType;
typedef SimpleDataObjectDecorator<
ClassLabelVectorType > ClassLabelVectorObjectType;
typedef ClassLabelVectorObjectType::Pointer ClassLabelVectorObjectPointer;
/** type of the decision rule */
typedef DecisionRule DecisionRuleType;
typedef DecisionRuleType::ConstPointer DecisionRulePointer;
/** Sets the input image */
void SetImage(const InputImageType * image);
const InputImageType * GetImage() const;
/** Number of classes. This must match the number of labels and membership
* functions provided by the user, otherwise an exception will be thrown at
*/
itkSetMacro( NumberOfClasses, unsigned int );
itkGetConstMacro( NumberOfClasses, unsigned int );
/** Set/Get the decision rule. */
itkSetConstObjectMacro( DecisionRule, DecisionRuleType );
itkGetConstObjectMacro( DecisionRule, DecisionRuleType );
/** Sets input vector of class labels. The length of this vector must match
* the number of classes, otherwise an exception will be thrown at run time.
* */
void SetClassLabels(const ClassLabelVectorObjectType * classLabels );
/** Sets input vector of membership functions. The length of this vector must match
* the number of classes, otherwise an exception will be thrown at run time.
* */
void SetMembershipFunctions(const MembershipFunctionVectorObjectType * membershipFunctions );
/** Sets array of weights for the membership functions */
void SetMembershipFunctionsWeightsArray(const MembershipFunctionsWeightsArrayObjectType * weightsArray );
protected:
ImageClassifierFilter();
virtual ~ImageClassifierFilter() {}
void PrintSelf(std::ostream& os, Indent indent) const;
ImageClassifierFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
/** Starts the classification process */
void GenerateData();
private:
unsigned int m_NumberOfClasses;
/** Decision Rule */
DecisionRulePointer m_DecisionRule;
}; // end of class
} // end of namespace Statistics
} // end of namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageClassifierFilter.txx"
#endif
#endif
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