Compressing and decompressing bitmap to and from jpeg in memory

http://www.cs.ruu.nl/people/jeroen/article/jpeg/
go  there
or do a search on the jpeg specs

Try Ilib:
www.radix.net/~cknudsen/Ilib

It supports both jpeg and bmp.

Good Luck !

PS
You didn't specify programming language, the above library is in c.
It's easy to use and have examples with it (if c is your programming language).

Not that this is immediately applicable, but Gamasutra has just run an article regarding JPEG compression/decompression.  It does pick out a few nice subtleties about the time critical paths and such, maakes it worth a read.

http://www.gamasutra.com/features/20020306/iorio_01.htm

Corel's been well loved:
http://www3.corel.com/cgi-bin/gx.cgi/AppLogic+FTContentServer?pagename=Corel/Index

PaintShopPro for the snapshots:
http://www.jasc.com/

For Visual add-on tools, shop @:
http://www.vbxtras.com

fyi, this link
> but Gamasutra has just run

locked me up, destroyed my IE go-back buttons, asked for password and demanded enabling cookies. (beware)

>or do a search on the jpeg specs

ditto, emphasis on last letter. It is a plural. (be_aware)

Oh, forgot about the password thing.  Start at www.gamasutra.com to register.  They're good about not spamming or dropping lots of tracking cookies, and the content is good, so registration is worthwhile there.

But destroying IE's buttons!  Hee, hee, yet another reason not to use IE!

quirkyquirky's answers are so-o boring!

This person has been suspended for multiple violations of the Member Agreement, and will reject the proposed answer, and return your question to the Active Questions List.  The Moderator Group is deleting all 388 locked questions.

These were posted by three persons:

quirkyquirky
EliteKiller
liloXwin
 
Thank you,
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