<?xml version="1.0" encoding='utf-8'?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1" title="Image scaling - Page 3 - Wikipedia">
<p>
<a accesskey="1" href="page.php?w=Image_scaling&amp;p=2">1.Previous</a><br />
<a accesskey="3" href="page.php?w=Image_scaling&amp;p=4">3.Next</a>
</p>
<p>the conversion of a <a href="page.php?w=discrete_signal">discrete signal</a> from a <a href="page.php?w=sampling_rate">sampling rate</a> (in this case, the local sampling rate) to another.</p>

<p><big> Mathematical </big></p>
<p>Image scaling can be interpreted as a form of image resampling or image reconstruction from the view of the <a href="page.php?w=Nyquist_theorem">Nyquist sampling theorem</a>. According to the theorem, downsampling to a smaller image from a higher-resolution original can only be carried out after applying a suitable 2D <a href="page.php?w=anti-aliasing_filter">anti-aliasing filter</a></p><p>
<a accesskey="1" href="page.php?w=Image_scaling&amp;p=2">1.Previous</a><br />
<a accesskey="3" href="page.php?w=Image_scaling&amp;p=4">3.Next</a>
</p>

<do type="prev" label="Search">
        <go href="search.wml"/>
</do>

</card>
</wml>
