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Compressing and decompressing bitmap to and from jpeg in memory

Posted on 2002-03-06
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Last Modified: 2010-04-17
 Hi.

  I need code to compress/decompress bitmap images in JPEG without passing through a file, it must be done completelly in memory for speed's sake.

Thanks.
Jose Serpa
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Question by:jasg
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Expert Comment

by:madface
ID: 6844951
http://www.cs.ruu.nl/people/jeroen/article/jpeg/
go  there
or do a search on the jpeg specs
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Expert Comment

by:ygal02
ID: 6846904
Try Ilib:
www.radix.net/~cknudsen/Ilib

It supports both jpeg and bmp.

Good Luck !
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by:ygal02
ID: 6846905
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).
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Expert Comment

by:ct.smith
ID: 6852256
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
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by:SunBow
ID: 6861267
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by:SunBow
ID: 6861301
PaintShopPro for the snapshots:
http://www.jasc.com/
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by:SunBow
ID: 6861310
For Visual add-on tools, shop @:
http://www.vbxtras.com
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Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

 
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by:SunBow
ID: 6861337
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)
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by:SunBow
ID: 6861345
>or do a search on the jpeg specs

ditto, emphasis on last letter. It is a plural. (be_aware)
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by:ct.smith
ID: 6861363
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!
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by:quirkyquirky
ID: 7299416
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by:SunBow
ID: 7300302
quirkyquirky's answers are so-o boring!
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by:ComTech
ID: 7300657
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,
ComTech
CS Admin @ EE
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by:nico5038
ID: 7508101

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
 - PAQ'd and pts removed
Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

Nic;o)
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Accepted Solution

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Jgould earned 0 total points
ID: 7547995
Question has been closed as per recommendation

JGould-EE Moderator
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