/usr/include/OTB-5.8/otbJoinHistogramMI.h is in libotb-dev 5.8.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | /*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt 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 otbJoinHistogramMI_h
#define otbJoinHistogramMI_h
#include "itkHistogram.h"
namespace otb
{
namespace Functor
{
template<class TInput1, class TInput2, class TOutput>
class JoinHistogramMI
{
public:
typedef double HistogramFrequencyType;
typedef typename itk::Statistics::Histogram<HistogramFrequencyType,
itk::Statistics::DenseFrequencyContainer2 > HistogramType;
JoinHistogramMI() {}
virtual ~JoinHistogramMI() {}
inline TOutput operator ()(const TInput1& itA,
const TInput2& itB, const HistogramType* histogram)
{
TOutput jointEntropy = itk::NumericTraits<TOutput>::Zero;
HistogramFrequencyType totalFreq = histogram->GetTotalFrequency();
typename HistogramType::MeasurementVectorType sample(2);
for (unsigned long pos = 0; pos < itA.Size(); ++pos)
{
double valueA = static_cast<double>(itA.GetPixel(pos));
double valueB = static_cast<double>(itB.GetPixel(pos));
sample[0] = valueA;
sample[1] = valueB;
typename HistogramType::IndexType index;
histogram->GetIndex(sample, index);
HistogramFrequencyType freq = histogram->GetFrequency(index);
if (freq > 0)
{
jointEntropy += freq * vcl_log(freq);
}
}
jointEntropy = -jointEntropy / static_cast<TOutput>(totalFreq) +
vcl_log(totalFreq);
return jointEntropy;
}
};
}
} // end namespace otb
#endif
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