LuminanceOfilt.C

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00001 /*!@file Transport/LuminanceOfilt.C Output filter that converts rgb images to their grayscale luminance */
00002 
00003 // //////////////////////////////////////////////////////////////////// //
00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2000-2005   //
00005 // by the University of Southern California (USC) and the iLab at USC.  //
00006 // See http://iLab.usc.edu for information about this project.          //
00007 // //////////////////////////////////////////////////////////////////// //
00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected //
00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency //
00010 // in Visual Environments, and Applications'' by Christof Koch and      //
00011 // Laurent Itti, California Institute of Technology, 2001 (patent       //
00012 // pending; application number 09/912,225 filed July 23, 2001; see      //
00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status).     //
00014 // //////////////////////////////////////////////////////////////////// //
00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit.       //
00016 //                                                                      //
00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can   //
00018 // redistribute it and/or modify it under the terms of the GNU General  //
00019 // Public License as published by the Free Software Foundation; either  //
00020 // version 2 of the License, or (at your option) any later version.     //
00021 //                                                                      //
00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope  //
00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the   //
00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      //
00025 // PURPOSE.  See the GNU General Public License for more details.       //
00026 //                                                                      //
00027 // You should have received a copy of the GNU General Public License    //
00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write   //
00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,   //
00030 // Boston, MA 02111-1307 USA.                                           //
00031 // //////////////////////////////////////////////////////////////////// //
00032 //
00033 // Primary maintainer for this file: Rob Peters <rjpeters at usc dot edu>
00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Transport/LuminanceOfilt.C $
00035 // $Id: LuminanceOfilt.C 8594 2007-07-19 23:28:46Z rjpeters $
00036 //
00037 
00038 #ifndef TRANSPORT_LUMINANCEOFILT_C_DEFINED
00039 #define TRANSPORT_LUMINANCEOFILT_C_DEFINED
00040 
00041 #include "Transport/LuminanceOfilt.H"
00042 
00043 #include "Image/ColorOps.H"
00044 #include "Image/Image.H"
00045 #include "Image/Pixels.H"
00046 #include "Raster/GenericFrame.H"
00047 #include "Transport/FrameInfo.H"
00048 
00049 // ######################################################################
00050 LuminanceOfilt::LuminanceOfilt(OptionManager& mgr,
00051                              const std::string& descrName,
00052                              const std::string& tagName)
00053   :
00054   FrameOfilt(mgr, descrName, tagName)
00055 {}
00056 
00057 // ######################################################################
00058 LuminanceOfilt::~LuminanceOfilt()
00059 {}
00060 
00061 // ######################################################################
00062 void LuminanceOfilt::filterFrame(FrameOstream& dest,
00063                                  const GenericFrame& frame,
00064                                  const std::string& shortname,
00065                                  const FrameInfo& auxinfo)
00066 {
00067   const GenericFrame::NativeType t = frame.nativeType();
00068 
00069   if (t == GenericFrame::RGB_U8 ||
00070       (t == GenericFrame::VIDEO
00071        && frame.asVideo().getMode() != VIDFMT_GREY))
00072     {
00073       const Image<byte> lum = luminance(frame.asRgb());
00074       dest.writeFrame(GenericFrame(lum),
00075                       shortname + "-lum",
00076                       FrameInfo(auxinfo.description + " (luminance)",
00077                                 auxinfo.srcpos));
00078     }
00079   else if (t == GenericFrame::RGB_F32)
00080     {
00081       const Image<float> lum = luminance(frame.asRgbF32());
00082       dest.writeFrame(GenericFrame(lum, frame.floatFlags()),
00083                       shortname + "-lum",
00084                       FrameInfo(auxinfo.description + " (luminance)",
00085                                 auxinfo.srcpos));
00086     }
00087   else if (t == GenericFrame::NONE
00088            || t == GenericFrame::GRAY_U8
00089            || t == GenericFrame::GRAY_F32
00090            || (t == GenericFrame::VIDEO
00091                && frame.asVideo().getMode() == VIDFMT_GREY))
00092     {
00093       // it's already greyscale, so just pass the frame through as-is
00094       dest.writeFrame(frame, shortname, auxinfo);
00095     }
00096   else
00097     LFATAL("Oops! Don't know how to generate luminance of %s image (%s)",
00098            frame.frameSpec().getDescription().c_str(),
00099            shortname.c_str());
00100 }
00101 
00102 // ######################################################################
00103 /* So things look consistent in everyone's emacs... */
00104 /* Local Variables: */
00105 /* mode: c++ */
00106 /* indent-tabs-mode: nil */
00107 /* End: */
00108 
00109 #endif // TRANSPORT_LUMINANCEOFILT_C_DEFINED
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