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<h2 class="chapter">31 Image Processing</h2>
<p>Since an image basically is a matrix Octave is a very powerful
environment for processing and analyzing images. To illustrate
how easy it is to do image processing in Octave, the following
example will load an image, smooth it by a 5-by-5 averaging filter,
and compute the gradient of the smoothed image.
<pre class="example"> I = imread ("myimage.jpg");
S = conv2 (I, ones (5, 5) / 25, "same");
[Dx, Dy] = gradient (S);
</pre>
<p class="noindent">In this example <code>S</code> contains the smoothed image, and <code>Dx</code>
and <code>Dy</code> contains the partial spatial derivatives of the image.
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<li><a accesskey="1" href="Loading-and-Saving-Images.html#Loading-and-Saving-Images">Loading and Saving Images</a>
<li><a accesskey="2" href="Displaying-Images.html#Displaying-Images">Displaying Images</a>
<li><a accesskey="3" href="Representing-Images.html#Representing-Images">Representing Images</a>
<li><a accesskey="4" href="Plotting-on-top-of-Images.html#Plotting-on-top-of-Images">Plotting on top of Images</a>
<li><a accesskey="5" href="Color-Conversion.html#Color-Conversion">Color Conversion</a>
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distrib
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i586
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media
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contrib-release
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3e60ff9d4d6f58c8fbd17208f14089fa
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files
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