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Technical Assistance w/ JPEG Algorithm?

Posted by Cliff on from the insufficient-data-for-comprehension dept.

Aaditya Sood asks: "I'm working on a DSP [?] project and am currently hacking away at the JPEG [?] algorithim. However I can't find the technical specs for it even though I have IJG's pseudo-C code. I hail from India so net time is not cheap for me. Could someone please point me to some resources on the Web which pertain to JPEG information?"

6 comments

  1. TIFF by Remote · · Score: 2

    Try this:
    http://partners.adobe.com /asn/developer/PDFS/TN/TIFF6.pdf

    This is the TIFF specification (very useful) but as TIFF supports JPEG compression the scheme is well explained. GIF compression is explained too. It is 385k. If bandwidth is really an issue, e-mail me and I can send you a .zip (which is still 269kb)


    1. Re:TIFF by Remote · · Score: 1

      Where I say "GIF compression" please read "LZW compression".

  2. Check out wotsit.org by WestonP · · Score: 1

    wotsit.org has info on lots of file formats, including JPEG.

    Hey everybody, check out The MACE project!

    1. Re:Check out wotsit.org by Tet · · Score: 2
      wotsit.org has info on lots of file formats, including JPEG.

      Of course, JPEG isn't a file format but an encoding algorithm. There are currently two main file formats for distributing encoded JPEG data streams: JFIF and TIFF. Fortunately, wotsit.org contains both specs for the file formats and specs for the encoding algorithm. This message was brought to you courtesy of Pedants-R-Us (tm).

      --
      "The invisible and the non-existent look very much alike." -- Delos B. McKown
  3. Have you tried the JPEG FAQ? by scotpurl · · Score: 3

    http://www.faqs.org/faqs/jpeg-faq/

  4. The Wotsit File Format Collection by crovax · · Score: 2

    The The Wotsit File Format Collection has specs for almost any format you could want.
    Using the search on there page I pulled up 6 documents that contain all the specs and other information on the JPEG.
    -----
    If my facts are wrong then tell me. I don't mind.