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<span class="path"><a href="index.html">Scilab 2 C Converter</a> >> <a href="section_c4a64b600f61b91c1ebf30f1b892cb10.html">Scilab 2 C Converter</a> > CV_Canny</span>
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<div class="refnamediv"><h1 class="refname">CV_Canny</h1>
<p class="refpurpose">Finds edges in image using Canny algorithm</p></div>
<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3>
<div class="synopsis"><pre><span class="default">edges</span><span class="default"> = </span><span class="functionid">CV_Canny</span><span class="default">(</span><span class="default">srcimg</span><span class="default">,</span><span class="default">threhold1</span><span class="default">,</span><span class="default">threshold2</span><span class="default">,</span><span class="default">aperture_size</span><span class="default">,</span><span class="default">L2gradient</span><span class="default">)</span></pre></div></div>
<div class="refsection"><h3 class="title">Parameters</h3>
<dl><dt><span class="term">srcimg :</span>
<dd><p class="para">single-channel 8-bit input image.</p></dd></dt>
<dt><span class="term">threshold1 :</span>
<dd><p class="para">first threshold for the hysteresis procedure.</p></dd></dt>
<dt><span class="term">threshold2 :</span>
<dd><p class="para">second threshold for the hysteresis procedure.</p></dd></dt>
<dt><span class="term">aperture_size :</span>
<dd><p class="para">aperture size for the Sobel() operator.</p></dd></dt>
<dt><span class="term">L2gradient :</span>
<dd><p class="para">a flag, indicating whether a more accurate</p></dd></dt></dl></div>
<div class="refsection"><h3 class="title">Description</h3>
<p class="para">This function can be used for finding edes in single channel 8 bit
image. 'aperture_size' and 'L2gradient' are optionals. By default,
aperture_size is 3 and L2gradient is false.</p>
<p class="para">For L2gradient: L_2 norm =sqrt{(dI/dx)^2 + (dI/dy)^2} should be used to calculate the image gradient magnitude (L2gradient=1 ), or whether the default L_1 norm =|dI/dx|+|dI/dy| is enough (L2gradient=0).</p>
<p class="para">This is curretly dummy function. It provides no functionality but is required
for providing support for generating C code for OpenCV</p>
<p class="para"></p></div>
<div class="refsection"><h3 class="title">Examples</h3>
<div class="programlisting"><table border="0" width="100%"><tr><td width="98%"><pre class="scilabcode"><span class="scilabid">img</span> <span class="scilaboperator">=</span> <span class="scilabid">CV_LoadImage</span><span class="scilabopenclose">(</span><span class="scilabstring">'</span><span class="scilabstring">~/test.jpg</span><span class="scilabstring">'</span><span class="scilabdefault">,</span><span class="scilabnumber">0</span><span class="scilabopenclose">)</span>
<a class="scilabcommand" href="scilab://dst">dst</a> <span class="scilabstring">=</span> <span class="scilabstring">CV_CvtColor(img</span><span class="scilabdefault">,</span><span class="scilabstring">"</span><span class="scilabstring">CV_RGB2GRAY</span><span class="scilabstring">"</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span>
<span class="scilabid">edge</span> <span class="scilaboperator">=</span> <span class="scilabid">CV_Canny</span><span class="scilabopenclose">(</span><a class="scilabcommand" href="scilab://dst">dst</a><span class="scilabdefault">,</span><span class="scilabnumber">50</span><span class="scilabdefault">,</span><span class="scilabnumber">100</span><span class="scilabdefault">,</span><span class="scilabnumber">3</span><span class="scilabdefault">,</span><span class="scilabnumber">0</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span></pre></td><td valign="top"><a href="scilab://scilab.execexample/"><img src="ScilabExecute.png" border="0"/></a></td><td valign="top"><a href="scilab://scilab.editexample/"><img src="ScilabEdit.png" border="0"/></a></td><td></td></tr></table></div></div>
<div class="refsection"><h3 class="title">See also</h3>
<ul class="itemizedlist"><li class="member"><a href="CV_LoadImage.html" class="link">CV_CvtColor</a></li></ul></div>
<div class="refsection"><h3 class="title">Authors</h3>
<ul class="itemizedlist"><li class="member">Siddhesh Wani</li></ul></div>
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