The _img_ plugin is part of the default install and requires _Image::Magick_.

<pre>
Index: Makefile.PL
===================================================================
--- Makefile.PL (revision 2675)
+++ Makefile.PL (working copy)
@@ -83,5 +83,6 @@
                'Mail::Sendmail'        => 0,
                'HTML::Parser'          => 0,
                'URI'                   => 0,
+               'Image::Magick'         => 0,
        },
 );
</pre>