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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 conv2PreserveEnergy</title> <meta name="keywords" content="conv2PreserveEnergy"> <meta name="description" content=""> <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> > conv2PreserveEnergy.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>conv2PreserveEnergy</h1><h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong></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 result = conv2PreserveEnergy(data,filter) </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"></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)"></ul>This function is called by:<ul style="list-style-image:url(../matlabicon.gif)"></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 result = conv2PreserveEnergy(data,filter)</a>0002 0003 result = conv2(data,filter,<span class="string">'same'</span>);0004 rsize = size(result);0005 fsize = size(filter);0006 fsize2 = (fsize - 1)/2;0007 fsum = sum(filter(:));0008 0009 ystart = 1 + fsize2(1);0010 yend = rsize(1) - fsize2(1);0011 xstart = 1 + fsize2(2);0012 xend = rsize(2) - fsize2(2);0013 0014 <span class="keyword">if</span> (rsize(1) > fsize(1))0015 <span class="keyword">for</span> y = 1:fsize2(1)0016 <span class="comment">% top</span>0017 fSumTop = sum(sum(filter(fsize(1)-y:fsize(1),:)));0018 <span class="keyword">if</span> (fSumTop ~= 0)0019 result(y,xstart:xend) = result(y,xstart:xend) * fsum / fSumTop;0020 <span class="keyword">end</span>0021 0022 <span class="comment">% bottom</span>0023 fSumBottom = sum(sum(filter(1:y,:)));0024 <span class="keyword">if</span> (fSumBottom ~= 0)0025 result(rsize(1)-y+1,xstart:xend) = result(rsize(1)-y+1,xstart:xend) * fsum / fSumBottom;0026 <span class="keyword">end</span>0027 <span class="keyword">end</span>0028 <span class="keyword">end</span>0029 0030 <span class="keyword">if</span> (rsize(2) > rsize(1))0031 <span class="keyword">for</span> x = 1:fsize2(2)0032 <span class="comment">% left</span>0033 fSumLeft = sum(sum(filter(:,fsize(2)-x:fsize(2))));0034 <span class="keyword">if</span> (fSumLeft ~= 0)0035 result(ystart:yend,x) = result(ystart:yend,x) * fsum / fSumLeft;0036 <span class="keyword">end</span>0037 0038 <span class="comment">% right</span>0039 fSumRight = sum(sum(filter(:,1:x)));0040 <span class="keyword">if</span> (fSumRight ~= 0)0041 result(ystart:yend,rsize(2)-x+1) = result(ystart:yend,rsize(2)-x+1) * fsum / fSumRight;0042 <span class="keyword">end</span>0043 0044 <span class="comment">% corners</span>0045 <span class="keyword">if</span> (rsize(1) > fsize(1))0046 <span class="keyword">for</span> y = 1:fsize2(1)0047 fSumTL = sum(sum(filter(fsize(1)-y:fsize(1),fsize(2)-x:fsize(2))));0048 <span class="keyword">if</span> (fSumTL ~= 0)0049 result(y,x) = result(y,x) * fsum / fSumTL;0050 <span class="keyword">end</span>0051 0052 fSumTR = sum(sum(filter(fsize(1)-y:fsize(1),1:x)));0053 <span class="keyword">if</span> (fSumTR ~= 0)0054 result(y,rsize(2)-x+1) = result(y,rsize(2)-x+1) * fsum / fSumTR;0055 <span class="keyword">end</span>0056 0057 fSumBL = sum(sum(filter(1:y,fsize(2)-x:fsize(2))));0058 <span class="keyword">if</span> (fSumBL ~= 0)0059 result(rsize(1)-y+1,x) = result(rsize(1)-y+1,x) * fsum / fSumBL;0060 <span class="keyword">end</span>0061 0062 fSumBR = sum(sum(filter(1:y,1:x)));0063 <span class="keyword">if</span> (fSumBR ~= 0)0064 result(rsize(1)-y+1,rsize(2)-x+1) = result(rsize(1)-y+1,rsize(2)-x+1) * fsum / fSumBR;0065 <span class="keyword">end</span>0066 <span class="keyword">end</span>0067 <span class="keyword">end</span>0068 <span class="keyword">end</span>0069 <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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