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    <title>Pither.com: PNG compression</title>
    <link>http://www.pither.com/articles/2007/05/03/png-compression</link>
    <language>en-us</language>
    <ttl>40</ttl>
    <description>by Simon Pither, freelance developer and systems administrator</description>
    <item>
      <title>PNG compression</title>
      <description>&lt;p&gt;Having failed to find the option in &lt;a href="http://www.gimp.org/"&gt;the GIMP&lt;/a&gt; to create colour mapped PNG files, I have just had to discover a couple of handy commands...&lt;/p&gt;

&lt;p&gt;pngnq - tool for optimizing PNG (Portable Network Graphics) images
pngcrush - optimizes PNG (Portable Network Graphics) files&lt;/p&gt;

&lt;p&gt;The first of these takes a RGB PNG and gives back a colour mapped (by default, 256 colours) image.&lt;/p&gt;

&lt;p&gt;The second takes those images (or RGB format ones too) and crushes them by about 20% (on the images I have been using today).&lt;/p&gt;

&lt;p&gt;So the 22k file that GIMP created is now about 9k!&lt;/p&gt;</description>
      <pubDate>Thu, 03 May 2007 12:28:40 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:342d14d9-4cca-4509-8cc0-d15d6cdff7a1</guid>
      <author>Simon</author>
      <link>http://www.pither.com/articles/2007/05/03/png-compression</link>
      <category>work</category>
      <category>graphics</category>
      <category>png</category>
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