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<head>
<title>wenergy2</title>
</head>
<body bgcolor="#FFFFFF">
<center>Scilab Wavelet Toolbox Function </center>
<div align="right">Last update : June 2007 </div>
<p>
<b>wenergy2</b> - Energy Statistics from two dimension multiple level decompostion </p>
<h3>
<font color="blue">Calling Sequence</font>
</h3>
<dl>
<dd>
<tt>[Ea,Ed]=wenergy(c,s)</tt>
</dd>
<dd>
<tt>[Ea,Eh,Ev,Ed]=wenergy(c,s)</tt>
</dd>
</dl>
<h3>
<font color="blue">Parameters</font>
</h3>
<ul>
<li>
<tt>
<b>Ea </b>
</tt>
: energy percentage of approximation coefficent
</li>
<li>
<tt>
<b>Eh </b>
</tt>
: energy percentage of horizontal detail coefficent
</li>
<li>
<tt>
<b>Ec </b>
</tt>
: energy percentage of vertical detail coefficent
</li>
<li>
<tt>
<b>Ed </b>
</tt>
: energy percentage of diagonal detail coefficent, vector
</li>
<li>
<tt>
<b>c </b>
</tt>
: coefficent array
</li>
<li>
<tt>
<b>s </b>
</tt>
: size array
</li>
</ul>
<h3>
<font color="blue">Description</font>
</h3>
<p>
wenergy2 is to calculate the energy percentage of approximation and detail coefficent for two dimension decompostion.
</p>
<h3>
<font color="blue">Examples</font>
</h3>
<pre>
x=rand(100,100);
[C,S]=wavedec2(x,3,'db2');
[Ea,Ed]=wenergy2(C,S);
</pre>
<h3>
<font color="blue">Author</font>
</h3>
<p>Roger Liu and Isaac Zhi </p>
<h3>
<font color="blue">See Also</font>
</h3>
<p>
<a href="wavedec2.htm">
<tt>
<b>wavedec2</b>
</tt>
</a>, <a href="waverec2.htm">
<tt>
<b>waverec2</b>
</tt>
</a>, </p>
</body>
</html>
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