FlickerNBackChannel.C

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00001 /*!@file Channels/FlickerNBackChannel.C */
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   //
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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:
00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Channels/FlickerNBackChannel.C $
00035 
00036 #ifndef FLICKERNBACKCHANNEL_C_DEFINED
00037 #define FLICKERNBACKCHANNEL_C_DEFINED
00038 
00039 #include "Channels/FlickerNBackChannel.H"
00040 
00041 #include "Image/MathOps.H" // for absDiff()
00042 #include "rutz/trace.h"
00043 
00044 // ######################################################################
00045 // FlickerNBackChannel member definitions:
00046 // ######################################################################
00047 
00048 // ######################################################################
00049 FlickerNBackChannel::FlickerNBackChannel(OptionManager& mgr) :
00050   GaussianPyrChannel(mgr, "FlickerNBack", "flicker", FLICKER),
00051   itsQueueLength("FlickerNBackQueueLength", this, SimTime::MSECS(50)),
00052   itsQueue()
00053 {
00054 GVX_TRACE(__PRETTY_FUNCTION__);
00055   itsTakeAbs.setVal(true);
00056   itsNormalizeOutput.setVal(true);
00057 }
00058 
00059 // ######################################################################
00060 FlickerNBackChannel::~FlickerNBackChannel()
00061 {
00062 GVX_TRACE(__PRETTY_FUNCTION__);
00063 }
00064 
00065 // ######################################################################
00066 void FlickerNBackChannel::doInput(const InputFrame& inframe)
00067 {
00068 GVX_TRACE(__PRETTY_FUNCTION__);
00069   ASSERT(inframe.grayFloat().initialized());
00070 
00071   //add onto our buffer
00072   itsQueue.push_back(ImageHolder(inframe.grayFloat(), inframe.time()));
00073 
00074   //if we are greater than our queue length we can take a difference
00075   if ( (itsQueue.back().time() - itsQueue.front().time()) >= itsQueueLength.getVal())
00076   {
00077     // take simple abs difference between the front and back of our queue. 
00078     Image<float> fli = absDiff(itsQueue.back().image(), 
00079                                itsQueue.front().image());
00080 
00081     //empty one off the front, our oldest frame
00082     itsQueue.pop_front();
00083 
00084     SingleChannel::doInput(InputFrame::fromGrayFloat
00085                            (&fli, inframe.time(),
00086                             &inframe.clipMask(), inframe.pyrCache()));
00087   }
00088 }
00089 
00090 // ######################################################################
00091 void FlickerNBackChannel::reset1()
00092 {
00093 GVX_TRACE(__PRETTY_FUNCTION__);
00094   // reset some stuff in FlickerNBackChannel
00095   itsQueue.clear();
00096 
00097   // propagate to our base class:
00098   SingleChannel::reset1();
00099 }
00100 
00101 // ######################################################################
00102 /* So things look consistent in everyone's emacs... */
00103 /* Local Variables: */
00104 /* indent-tabs-mode: nil */
00105 /* End: */
00106 
00107 #endif // FLICKERCHANNEL_C_DEFINED
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