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/*=========================================================================
Program: VMTK
Module: $RCSfile: vtkvmtkOtsuMultipleThresholdsImageFilter.cxx,v $
Language: C++
Date: $Date: 2006/04/06 16:48:25 $
Version: $Revision: 1.1 $
Copyright (c) Luca Antiga, David Steinman. All rights reserved.
See LICENCE file for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.htm
for details.
Portions of this code are covered under the ITK copyright.
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.
=========================================================================*/
#include "vtkvmtkOtsuMultipleThresholdsImageFilter.h"
#include "vtkImageData.h"
#include "vtkFloatArray.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkObjectFactory.h"
#include "vtkvmtkITKFilterUtilities.h"
#include "itkOtsuMultipleThresholdsImageFilter.h"
vtkStandardNewMacro(vtkvmtkOtsuMultipleThresholdsImageFilter);
vtkvmtkOtsuMultipleThresholdsImageFilter::vtkvmtkOtsuMultipleThresholdsImageFilter()
{
this->NumberOfHistogramBins = 128;
this->NumberOfThresholds = 1;
this->LabelOffset = 0;
this->Thresholds = NULL;
}
vtkvmtkOtsuMultipleThresholdsImageFilter::~vtkvmtkOtsuMultipleThresholdsImageFilter()
{
if (this->Thresholds)
{
this->Thresholds->Delete();
this->Thresholds = NULL;
}
}
int vtkvmtkOtsuMultipleThresholdsImageFilter::RequestInformation (
vtkInformation * vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkDataObject::SetPointDataActiveScalarInfo(outInfo, VTK_UNSIGNED_SHORT, -1);
return 1;
}
void vtkvmtkOtsuMultipleThresholdsImageFilter::SimpleExecute(vtkImageData *input, vtkImageData *output)
{
typedef float PixelType;
typedef unsigned short OutputPixelType;
const int Dimension = 3;
typedef itk::Image<PixelType, Dimension> ImageType;
typedef itk::Image<OutputPixelType, Dimension> OutputImageType;
ImageType::Pointer inImage = ImageType::New();
vtkvmtkITKFilterUtilities::VTKToITKImage<ImageType>(input,inImage);
typedef itk::OtsuMultipleThresholdsImageFilter<ImageType, OutputImageType> OtsuFilterType;
typedef OtsuFilterType::ThresholdVectorType ThresholdVectorType;
OtsuFilterType::Pointer imageFilter = OtsuFilterType::New();
imageFilter->SetInput(inImage);
imageFilter->SetNumberOfHistogramBins(this->NumberOfHistogramBins);
imageFilter->SetNumberOfThresholds(this->NumberOfThresholds);
imageFilter->SetLabelOffset(this->LabelOffset);
imageFilter->Update();
const ThresholdVectorType& thresholds = imageFilter->GetThresholds();
if (this->Thresholds)
{
this->Thresholds->Delete();
this->Thresholds = NULL;
}
this->Thresholds = vtkFloatArray::New();
this->Thresholds->SetNumberOfTuples(thresholds.size());
for (unsigned long j=0; j<thresholds.size(); j++)
{
this->Thresholds->SetValue(j,thresholds[j]);
}
OutputImageType::Pointer outputImage = imageFilter->GetOutput();
vtkvmtkITKFilterUtilities::ITKToVTKImage<OutputImageType>(outputImage,output);
}
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