2000.11.07 15:55 "OJPEG vs JPEG", by Michael O'Rourke

2000.11.08 06:07 "Re: OJPEG vs JPEG", by Tom Lane

> Can someone point to me to the spec of JPEG vs OJPEG.

Have a look at http://partners.adobe.com. There's a link to technotes, and there you should find a document "TTN2.draft.txt" which describes this stuff in detail.

Dunno about Adobe, but the copy I consider authoritative is at the IJG FTP site, ftp://ftp.uu.net/graphics/jpeg/TIFFTechNote2.txt.gz

regards, tom lane
organizer, Independent JPEG Group