📄 contrastmodulate.html
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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 contrastModulate</title> <meta name="keywords" content="contrastModulate"> <meta name="description" content="contrastModulate - contrast modulates an image according to a map"> <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> > contrastModulate.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>contrastModulate</h1><h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>contrastModulate - contrast modulates an image according to a map</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 resultImg = contrastModulate(img, modulationMap, varargin) </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"> contrastModulate - contrast modulates an image according to a map resultImg = contrastModulate(img, modulationMap, baseContrast, baseColor) contrast modulates image img such that that it has full contrast where modulationMask is 1. Img is an Image structure, modulationMap a map assumed to be scaled between 0 and 1 and of the same size as img. baseContrast (between 0 and 1) is the image contrast where modulationMap = 0. baseColor is the color at locations with low contrast. resultImg = contrastModulate(img, modulationMap, baseContrast) assumes baseColor = [1 1 1] (white). resultImg = contrastModulate(img, modulationMap, baseContrast) assumes baseContrast = 0 (opaque). See also <a href="plotSalientLocation.html" class="code" title="function plotSalientLocation(winner,lastWinner,img,params,varargin)">plotSalientLocation</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="fatal.html" class="code" title="function fatal(message)">fatal</a> fatal(message) - exits with a fatal error message.</li><li><a href="initializeImage.html" class="code" title="function [Img,err] = initializeImage(varargin);">initializeImage</a> initializeImage - initializes an image structure.</li><li><a href="loadImage.html" class="code" title="function imgData = loadImage(Image)">loadImage</a> loadImage - returns the imgData for the Image structure</li></ul>This function is called by:<ul style="list-style-image:url(../matlabicon.gif)"><li><a href="plotSalientLocation.html" class="code" title="function plotSalientLocation(winner,lastWinner,img,params,varargin)">plotSalientLocation</a> plotSalientLocation - plots the attended location into an existing figure.</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 <a name="_sub0" href="#_subfunctions" class="code">function resultImg = contrastModulate(img, modulationMap, varargin)</a>0002 <span class="comment">% contrastModulate - contrast modulates an image according to a map</span>0003 <span class="comment">%</span>0004 <span class="comment">% resultImg = contrastModulate(img, modulationMap, baseContrast, baseColor)</span>0005 <span class="comment">% contrast modulates image img such that that it has full</span>0006 <span class="comment">% contrast where modulationMask is 1.</span>0007 <span class="comment">% Img is an Image structure, modulationMap a map assumed</span>0008 <span class="comment">% to be scaled between 0 and 1 and of the same size as img.</span>0009 <span class="comment">% baseContrast (between 0 and 1) is the image contrast</span>0010 <span class="comment">% where modulationMap = 0.</span>0011 <span class="comment">% baseColor is the color at locations with low contrast.</span>0012 <span class="comment">%</span>0013 <span class="comment">% resultImg = contrastModulate(img, modulationMap, baseContrast)</span>0014 <span class="comment">% assumes baseColor = [1 1 1] (white).</span>0015 <span class="comment">%</span>0016 <span class="comment">% resultImg = contrastModulate(img, modulationMap, baseContrast)</span>0017 <span class="comment">% assumes baseContrast = 0 (opaque).</span>0018 <span class="comment">%</span>0019 <span class="comment">% See also plotSalientLocation, dataStructures.</span>0020 0021 <span class="comment">% This file is part of the SaliencyToolbox - Copyright (C) 2006-2007</span>0022 <span class="comment">% by Dirk B. Walther and the California Institute of Technology.</span>0023 <span class="comment">% See the enclosed LICENSE.TXT document for the license agreement.</span>0024 <span class="comment">% More information about this project is available at:</span>0025 <span class="comment">% http://www.saliencytoolbox.net</span>0026 0027 <span class="keyword">if</span> length(varargin) >= 10028 baseCon = varargin{1};0029 <span class="keyword">else</span>0030 baseCon = 0;0031 <span class="keyword">end</span>0032 0033 <span class="keyword">if</span> length(varargin) >= 20034 baseCol = varargin{2};0035 <span class="keyword">if</span> numel(baseCol) == 10036 baseCol = baseCol * [1 1 1];0037 <span class="keyword">end</span>0038 <span class="keyword">else</span>0039 baseCol = [1 1 1];0040 <span class="keyword">end</span>0041 0042 imData = <a href="loadImage.html" class="code" title="function imgData = loadImage(Image)">loadImage</a>(img);0043 <span class="keyword">if</span> img.dims == 20044 imData = repmat(imData,[1 1 3]);0045 <span class="keyword">end</span>0046 0047 m = modulationMap.data;0048 <span class="keyword">if</span> (size(m,1) ~= img.size(1) || size(m,2) ~= img.size(2))0049 <a href="fatal.html" class="code" title="function fatal(message)">fatal</a>(<span class="string">'Image and modulation map must have the same size!'</span>);0050 <span class="keyword">end</span>0051 0052 alpha = m * (1 - baseCon) + baseCon;0053 beta = 1 - alpha;0054 <span class="keyword">for</span> c = 1:30055 res(:,:,c) = alpha.*imData(:,:,c) + beta*baseCol(c);0056 <span class="keyword">end</span>0057 0058 <span class="keyword">if</span> isnan(img.filename)0059 label = <span class="string">'contrast modulated image'</span>;0060 <span class="keyword">else</span>0061 label = [<span class="string">'contrast modulated '</span> img.filename];0062 <span class="keyword">end</span>0063 resultImg = <a href="initializeImage.html" class="code" title="function [Img,err] = initializeImage(varargin);">initializeImage</a>(res,label);</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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