iLab Neuromorphic Robotics Toolkit  0.1
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ColorMapImpl.H
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1 /*! @file
2  @author Randolph Voorhies, Zhihao Li
3  @copyright GNU Public License (GPL v3)
4  @section License
5  @verbatim
6  // ////////////////////////////////////////////////////////////////////////
7  // The iLab Neuromorphic Robotics Toolkit (NRT) //
8  // Copyright 2010-2012 by the University of Southern California (USC) //
9  // and the iLab at USC. //
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12  // Hedco Neurociences Building, Room HNB-10 //
13  // Los Angeles, Ca 90089-2520 - USA //
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15  // See http://ilab.usc.edu for information about this project. //
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19  // The iLab Neuromorphic Robotics Toolkit is free software: you can //
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21  // Public License as published by the Free Software Foundation, either //
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33  @endverbatim */
34 
35 #ifndef INCLUDE_NRT_IMAGEPROC_COLOR_DETAILS_COLORMAPIMPL_H
36 #define INCLUDE_NRT_IMAGEPROC_COLOR_DETAILS_COLORMAPIMPL_H
37 
39 // ######################################################################
40 template <class T> inline
41  nrt::PixRGB<nrt::byte> nrt::applyColorMapToPixel(T v, T vmin, T vmax, nrt::ColorMap const & cm)
42 {
43  if (vmin >= vmax) NRT_FATAL("Min value of the pixel should be less than the max value.");
44 
45  T dv;
46 
47  if (v < vmin) v = vmin;
48  if (v > vmax) v = vmax;
49  dv = vmax - vmin;
50 
51  uint32 entry = uint32((cm.size()-1) * ((double)(v - vmin) / dv));
52  return cm.at(entry);
53 }
54 
55 // ######################################################################
56 template<class T> inline
58 {
59  nrt::Image<nrt::PixRGB<nrt::byte>> result(input.dims());
60  result = nrt::transform<PixRGB<nrt::byte>>(input,
61  [min, max, &cm](nrt::PixGray<T> const & val)
62  { return nrt::applyColorMapToPixel(val.val(), min, max, cm); });
63  return result;
64 }
65 
66 
67 #endif // INCLUDE_NRT_IMAGEPROC_COLOR_DETAILS_COLORMAPIMPL_H