ITK  4.9.0
Insight Segmentation and Registration Toolkit
WikiExamples/Statistics/SampleToHistogramFilter.cxx
#include "itkListSample.h"
#include "itkHistogram.h"
typedef itk::Vector<unsigned char, 1> MeasurementVectorType;
void CreateSample(SampleType::Pointer image);
int main(int, char *[])
{
SampleType::Pointer sample = SampleType::New();
CreateSample(sample);
SampleToHistogramFilterType::Pointer sampleToHistogramFilter =
SampleToHistogramFilterType::New();
sampleToHistogramFilter->SetInput(sample);
SampleToHistogramFilterType::HistogramSizeType histogramSize(1);
histogramSize.Fill(10);
sampleToHistogramFilter->SetHistogramSize(histogramSize);
sampleToHistogramFilter->Update();
const HistogramType* histogram = sampleToHistogramFilter->GetOutput();
std::cout << "Histogram vector size: " << histogram->GetMeasurementVectorSize() << std::endl;
for(unsigned int i = 0; i < histogram->GetSize()[0]; i++)
{
std::cout << "Frequency of " << i << " : (" << histogram->GetBinMin(0, i) << " to " << histogram->GetBinMax(0, i) << ") = " << histogram->GetFrequency(i) << std::endl;
}
std::cout << "Total count " << histogram->GetTotalFrequency() << std::endl;
return EXIT_SUCCESS;
}
void CreateSample(SampleType::Pointer sample)
{
MeasurementVectorType mv ;
mv[0] = 1.0 ;
sample->PushBack(mv) ;
mv[0] = 1.0 ;
sample->PushBack(mv) ;
mv[0] = 2.0 ;
sample->PushBack(mv) ;
}