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| ==SampleToHistogramFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| <source lang="cpp">
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| #include "itkSampleToHistogramFilter.h"
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| #include "itkListSample.h"
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| #include "itkHistogram.h"
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| typedef itk::Vector<unsigned char, 1> MeasurementVectorType;
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| typedef itk::Statistics::ListSample< MeasurementVectorType > SampleType ;
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| typedef itk::Statistics::Histogram< float,
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| itk::Statistics::DenseFrequencyContainer2 > HistogramType;
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| void CreateSample(SampleType::Pointer image);
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| int main(int, char *[])
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| {
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| SampleType::Pointer sample = SampleType::New();
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| CreateSample(sample);
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| typedef itk::Statistics::SampleToHistogramFilter<SampleType, HistogramType> SampleToHistogramFilterType;
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| SampleToHistogramFilterType::Pointer sampleToHistogramFilter =
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| SampleToHistogramFilterType::New();
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| sampleToHistogramFilter->SetInput(sample);
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| SampleToHistogramFilterType::HistogramSizeType histogramSize(1);
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| histogramSize.Fill(10);
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| sampleToHistogramFilter->SetHistogramSize(histogramSize); | |
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| sampleToHistogramFilter->Update();
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| const HistogramType* histogram = sampleToHistogramFilter->GetOutput();
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| std::cout << "Histogram vector size: " << histogram->GetMeasurementVectorSize() << std::endl;
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|
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| for(unsigned int i = 0; i < histogram->GetSize()[0]; i++)
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| {
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| std::cout << "Frequency of " << i << " : (" << histogram->GetBinMin(0, i) << " to " << histogram->GetBinMax(0, i) << ") = " << histogram->GetFrequency(i) << std::endl;
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| }
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| std::cout << "Total count " << histogram->GetTotalFrequency() << std::endl;
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| return EXIT_SUCCESS;
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| }
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| void CreateSample(SampleType::Pointer sample)
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| {
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| MeasurementVectorType mv ;
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| mv[0] = 1.0 ;
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| sample->PushBack(mv) ;
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| mv[0] = 1.0 ;
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| sample->PushBack(mv) ;
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| mv[0] = 2.0 ;
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| sample->PushBack(mv) ;
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| }
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| </source>
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| {{ITKCMakeLists|SampleToHistogramFilter}}
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