Inline image links

I'm trying to get PEAR Wiki Filter to ignore inline image links when using the mediawiki filter.

Default behaviour for MediaWiki is to convert a plaintext URL to an image,
e.g.
http://www.exaple.com/image.jpg

to something with tags, meaning that the image becomes hotlinked.

I'm trying to disable this and treat an image link as any other inline URL- just make a link to the file. What's the quickest way to achieve this?

Any help mcuh appreciated!

Thanks,
Chris.