00001 /*!@file Channels/FlickerChannel.H */ 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: 00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Channels/FlickerChannel.H $ 00035 // $Id: FlickerChannel.H 14477 2011-02-04 22:52:28Z dberg $ 00036 // 00037 00038 #ifndef FLICKERCHANNEL_H_DEFINED 00039 #define FLICKERCHANNEL_H_DEFINED 00040 00041 #include "Channels/GaussianPyrChannel.H" 00042 #include "Util/SimTime.H" 00043 00044 // ###################################################################### 00045 //! A temporal flicker channel. 00046 /*! This channel just keeps a memory trace of the previous frame and 00047 then does a basic center-surround processing on the difference 00048 between current and memorized input. The time constant determines 00049 how the memorized input should be updated when a new input 00050 arrives. */ 00051 class FlickerChannel : public GaussianPyrChannel 00052 { 00053 public: 00054 //! Construct with standard specs 00055 FlickerChannel(OptionManager& mgr, const std::string& descrNam = "Flicker", 00056 const std::string& tagNam = "flicker"); 00057 00058 //! Destructor 00059 virtual ~FlickerChannel(); 00060 00061 //! Reset FlickerChannel 00062 /*! See the base function in ModelComponent.H for info. */ 00063 virtual void reset1(); 00064 00065 protected: 00066 //! FlickerChannel requires only luminance input. 00067 virtual void doInput(const InputFrame& inframe); 00068 00069 /*! Time constant of the channel, in seconds. This 00070 is used to determine how to update our memory of the previous 00071 frame as a new frame arrives. If the previous frame is more than a 00072 time constant older than the new one, it will be replaced by the 00073 new one for the next step of processing; otherwise a mix between 00074 both will be used, depending on the difference between old and new 00075 times. */ 00076 NModelParam<SimTime> itsTimeConst; 00077 00078 private: 00079 Image<float> itsPrevInput; 00080 SimTime itsPrevTime; 00081 }; 00082 00083 // ###################################################################### 00084 /* So things look consistent in everyone's emacs... */ 00085 /* Local Variables: */ 00086 /* indent-tabs-mode: nil */ 00087 /* End: */ 00088 00089 #endif // FLICKERCHANNEL_H_DEFINED
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