Does your version of wiki support pictures in PDF
and/or EPS format?
MediaWiki supports uploading PDF and EPS files with the right
configuration. I haven't tried uploading EPS files, but providing
thumbnails of these and the PDFs should work.
Im doubtful thumbnails of eps would just work. Pdf thumbs need an extension
(pdfhandler) in order to thumbnail correctly. Uploading of both these
formats should be fine on vanilla mediawiki with a small config change to
add them to the allowed file types list.
-bawolff