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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 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
* \ingroup ITKStatistics
*/
template< typename TSample, typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_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 IdentifierType 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() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
ITK_DISALLOW_COPY_AND_ASSIGN(ImageClassifierFilter);
/** Starts the classification process */
void GenerateData() ITK_OVERRIDE;
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.hxx"
#endif
#endif
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