IntegerFlickerChannel.C

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00001 /*!@file Channels/IntegerFlickerChannel.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   //
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/Channels/IntegerFlickerChannel.C $
00035 // $Id: IntegerFlickerChannel.C 7857 2007-02-07 21:28:59Z rjpeters $
00036 //
00037 
00038 #ifndef CHANNELS_INTEGERFLICKERCHANNEL_C_DEFINED
00039 #define CHANNELS_INTEGERFLICKERCHANNEL_C_DEFINED
00040 
00041 #include "Channels/IntegerFlickerChannel.H"
00042 
00043 #include "Image/IntegerMathOps.H"
00044 #include "Image/MathOps.H" // for absDiff()
00045 #include "rutz/trace.h"
00046 
00047 // ######################################################################
00048 // IntegerFlickerChannel member definitions:
00049 // ######################################################################
00050 
00051 // ######################################################################
00052 IntegerFlickerChannel::
00053 IntegerFlickerChannel(OptionManager& mgr,
00054                       nub::ref<IntegerMathEngine> eng) :
00055   IntegerSimpleChannel(mgr, "Integer Flicker", "int-flicker", FLICKER,
00056                        rutz::make_shared(new IntgGaussianPyrBuilder
00057                                          (5, eng->getImath())),
00058                        eng),
00059   itsPrevInput()
00060 {
00061 GVX_TRACE(__PRETTY_FUNCTION__);
00062   itsTakeAbs.setVal(true);
00063   itsNormalizeOutput.setVal(true);
00064 }
00065 
00066 // ######################################################################
00067 IntegerFlickerChannel::~IntegerFlickerChannel()
00068 {
00069 GVX_TRACE(__PRETTY_FUNCTION__);
00070 }
00071 
00072 // ######################################################################
00073 void IntegerFlickerChannel::doInputInt(const IntegerInput& inp,
00074                                        const SimTime& t,
00075                                        PyramidCache<int>* cache,
00076                                        const Image<byte>& clipMask)
00077 {
00078 GVX_TRACE(__PRETTY_FUNCTION__);
00079 
00080   ASSERT(inp.grayInt().initialized());
00081 
00082   // If this is the first time the flicker channel has seen input,
00083   // then itsPrevInput will be uninitialized; obviously we can't
00084   // compute any flicker with only one frame, so we just store the
00085   // current input as the next iteration's previous input
00086   if (!itsPrevInput.initialized())
00087     {
00088       itsPrevInput = inp.grayInt();
00089     }
00090   else
00091     {
00092       // take simple abs difference between current and previous
00093       // frame:
00094       const Image<int> fli = absDiff(inp.grayInt(), itsPrevInput);
00095 
00096       IntegerSimpleChannel::doInputInt(IntegerInput::fromGrayOnly(fli),
00097                                        t, cache, clipMask);
00098 
00099       // update the previous image:
00100       itsPrevInput = inp.grayInt();
00101     }
00102 }
00103 
00104 // ######################################################################
00105 void IntegerFlickerChannel::reset1()
00106 {
00107 GVX_TRACE(__PRETTY_FUNCTION__);
00108   // reset some stuff in IntegerFlickerChannel
00109   itsPrevInput.freeMem();
00110 
00111   // propagate to our base class:
00112   IntegerSimpleChannel::reset1();
00113 }
00114 
00115 // ######################################################################
00116 /* So things look consistent in everyone's emacs... */
00117 /* Local Variables: */
00118 /* mode: c++ */
00119 /* indent-tabs-mode: nil */
00120 /* End: */
00121 
00122 #endif // CHANNELS_INTEGERFLICKERCHANNEL_C_DEFINED
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