jbig & jbg

Filename extensions: jbig & jbg

(related variations: jbig jbg)
An image format developed by the Joint Bi-level Image Experts Group. It is optimized for FAX type images, and has absolutely nothing to do with either JPEG or MPEG in spite of the similarity of names. It is lossless and free viewing programs are available for it for most platforms, but it is not directly recognized by most browsers.