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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"><html><head> <title>Description of evolveWTA</title> <meta name="keywords" content="evolveWTA"> <meta name="description" content="evolveWTA - evolves the winner-take-all network by one time step."> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="generator" content="m2html © 2003 Guillaume Flandin"> <meta name="robots" content="index, follow"> <link type="text/css" rel="stylesheet" href="../m2html.css"></head><body><a name="_top"></a><div><a href="../index.html">Home</a> > <a href="#">mfiles</a> > evolveWTA.m</div><!--<table width="100%"><tr><td align="left"><a href="../index.html"><img alt="<" border="0" src="../left.png"> Master index</a></td><td align="right"><a href="index.html">Index for .\mfiles <img alt=">" border="0" src="../right.png"></a></td></tr></table>--><h1>evolveWTA</h1><h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>evolveWTA - evolves the winner-take-all network by one time step.</strong></div><h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>function [wta,winner] = evolveWTA(wta) </strong></div><h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="fragment"><pre class="comment"> evolveWTA - evolves the winner-take-all network by one time step. [wta,winner] = evolveWTA(wta) Evolves wta by one time step, returns the resulting wta, and returns the winner coordinates if a winner was found. See also <a href="evolveLeakyIntFire.html" class="code" title="function [LIF,spikes] = evolveLeakyIntFire(LIF,t)">evolveLeakyIntFire</a>, <a href="runSaliency.html" class="code" title="function runSaliency(inputImage,varargin)">runSaliency</a>, <a href="dataStructures.html" class="code" title="">dataStructures</a>.</pre></div><!-- crossreference --><h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>This function calls:<ul style="list-style-image:url(../matlabicon.gif)"><li><a href="debugMsg.html" class="code" title="function debugMsg(message,varargin)">debugMsg</a> debugMsg displays a debug message with line number and filename.</li><li><a href="evolveLeakyIntFire.html" class="code" title="function [LIF,spikes] = evolveLeakyIntFire(LIF,t)">evolveLeakyIntFire</a> evolveLeakyIntFire - evolves an LIF network by one time step.</li></ul>This function is called by:<ul style="list-style-image:url(../matlabicon.gif)"><li><a href="batchSaliency.html" class="code" title="function [salMaps,fixations] = batchSaliency(images,numFixations,params)">batchSaliency</a> batchSaliency - batch processing of lists of images.</li><li><a href="guiSaliency.html" class="code" title="function varargout = guiSaliency(varargin)">guiSaliency</a> guiSaliency - a graphical user interface (GUI) version of the saliency code.</li><li><a href="runSaliency.html" class="code" title="function runSaliency(inputImage,varargin)">runSaliency</a> runSaliency - compute and display saliency map and fixations.</li></ul><!-- crossreference --><h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="fragment"><pre>0001 <span class="comment">% evolveWTA - evolves the winner-take-all network by one time step.</span>0002 <span class="comment">%</span>0003 <span class="comment">% [wta,winner] = evolveWTA(wta)</span>0004 <span class="comment">% Evolves wta by one time step, returns the resulting wta,</span>0005 <span class="comment">% and returns the winner coordinates if a winner was found.</span>0006 <span class="comment">%</span>0007 <span class="comment">% See also evolveLeakyIntFire, runSaliency, dataStructures.</span>0008 0009 <span class="comment">% This file is part of the SaliencyToolbox - Copyright (C) 2006-2007</span>0010 <span class="comment">% by Dirk B. Walther and the California Institute of Technology.</span>0011 <span class="comment">% See the enclosed LICENSE.TXT document for the license agreement.</span>0012 <span class="comment">% More information about this project is available at:</span>0013 <span class="comment">% http://www.saliencytoolbox.net</span>0014 0015 <a name="_sub0" href="#_subfunctions" class="code">function [wta,winner] = evolveWTA(wta)</a>0016 0017 time = wta.exc.time + wta.exc.timeStep;0018 winner = [-1,-1];0019 0020 <span class="comment">% first evolve the sm</span>0021 wta.sm = <a href="evolveLeakyIntFire.html" class="code" title="function [LIF,spikes] = evolveLeakyIntFire(LIF,t)">evolveLeakyIntFire</a>(wta.sm,time);0022 0023 <span class="comment">% set the input into the excitatory WTA neurons to the output of the sm</span>0024 wta.exc.I = wta.sm.V .* wta.exc.Ginput;0025 0026 <span class="comment">% evolve the excitatory neurons of the WTA network</span>0027 [wta.exc,spikes] = <a href="evolveLeakyIntFire.html" class="code" title="function [LIF,spikes] = evolveLeakyIntFire(LIF,t)">evolveLeakyIntFire</a>(wta.exc,time);0028 0029 <span class="comment">% erase any inhibitions we might have had</span>0030 wta.exc.Ginh = 0;0031 0032 <span class="comment">% did anyone fire?</span>0033 <span class="keyword">if</span> any(spikes(:))0034 idx = find(spikes); idx = idx(1);0035 [winner(1),winner(2)] = ind2sub(size(spikes),idx);0036 0037 <a href="debugMsg.html" class="code" title="function debugMsg(message,varargin)">debugMsg</a>(sprintf(<span class="string">'winner: (%d,%d) at %f ms'</span>,winner(1),winner(2),time*1000));0038 <a href="debugMsg.html" class="code" title="function debugMsg(message,varargin)">debugMsg</a>(sprintf(<span class="string">'SM voltage at winner: %g mV above rest'</span>,wta.sm.V(idx)*1000));0039 0040 <span class="comment">% the inihibitory interneuron gets all excited about the winner</span>0041 wta.inhib.Gexc = wta.inhib.Gleak * 10;0042 <span class="keyword">end</span>0043 0044 <span class="comment">% evolve the inhibitory interneuron</span>0045 [wta.inhib,spike] = <a href="evolveLeakyIntFire.html" class="code" title="function [LIF,spikes] = evolveLeakyIntFire(LIF,t)">evolveLeakyIntFire</a>(wta.inhib,time);0046 <span class="keyword">if</span> (spike)0047 <span class="comment">% trigger global inhibition</span>0048 wta.exc.Ginh = 1e-2;0049 0050 <span class="comment">% no need to be excited anymore</span>0051 wta.inhib.Gexc = 0;0052 <span class="keyword">end</span></pre></div><hr><address>Generated on Fri 07-Sep-2007 14:42:18 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/">m2html</a></strong> © 2003</address></body></html>⌨️ 快捷键说明
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