Breakthrough In JPEG Compression

Kris_J writes "The makers of the (classic) compression package Stuffit have written a program that can compress JPGs by roughly 30%. This isn't the raw image to JPG compression, this is lossless compression applied to the JPG file. Typical compression rates for JPGs are 2% to -1%. If you read the whitepaper (PDF), they are even proposing a new image format; StuffIt Image Format (SIF). Now I just need someone to write a SIF compressor for my old Kodak DC260."

Comments

WTF?

[m50d]

An image compression comparison with no lenna? What's the world coming to?

Re:Roughly 25%, but who's counting?

[Motherfucking Shit]

Dancin_Santa says:

I just installed an 800Gb hard disk in my system.

I always wondered how much space it took to keep track of who's been naughty and who's been nice...

Re:Fractal image format

[ID10T5]

I'm not sure how practical 100% reduction is, but if anyone is interested I have an extremely fast algorithm for doing it.

The results can be seen by the /. logo I have reduced here:

Re:What's the point?

[Zhe Mappel]

The listed uses ( http://www.stuffit.com/imagecompression/ ) seem trivial at best.

You're right. I read the list, reproduced below. Who'd want to:

* Send more photos via email
* Fit more on CDs, DVDs, and other backup media
* Save time when sending pictures over the internet or across the network
* Reduce bandwidth costs

After all, electronic storage media is infinite, and bandwidth is free!

Re:Fractal image format

[plumby]

100% compression of a file is easy. It's the decompression of that file into the original that's the tricky bit.

Re:Fractal image format

[Don Giovanni]

I believe you are looking for this:

Lzip

What is lzip?
Glad you asked. Lzip is an advanced file compression utility that
generates smaller file sizes than either gzip or bzip2, and does so
much faster. Lzip can achieve these goals because it it based on a
so-called "lossy" compression scheme (most other utilties make use of
slower, less efficient "lossless" compression). For more information,
you can consult the Frequently Asked Questions list. Or, you can dive
right in, grab the 1.0 tarball and start reducing your bloated files
down to 10%, 15%, in some cases 0% of their original size!

Re:Fractal image format

[Anonymous Coward]

They always do stuff like that. First, they kill Kennedy. Then, they land a man on the moon, but it wasn't someone we wanted to leave there - so money was spent bringing him back. Then, they do the watergate thing, then the 1980 olympics which led to a bad movie (and they knew it would, too). Lately, they've just been doing a lot of stuff that pisses me off.

One day, I'll find them - then they'll get what's coming to them. God help me, I'll use both sides of my hand.

Re:Fractal image format

[The Infamous Grimace]

Basically, a self-similar Poincare Hypersurface of a dynamical system that is sensitively dependent on initial conditions in at least one of it's phase space dimensions.

Well, that clears things up nicely... :-)

(tig)

Get this

[prjames]

So now I get the picture, only smaller!

Re:Fractal image format

[MasTRE]

> I would make the assumption that since jpeg is over 18years old, compression algroithms are at their limit for this image format.

Uh, dude - they just came out with this! So how can you say that? I would say this will actually ignite the minds of open-source compression experts (no, not literally) to rethink their approach to compressing JPEG, since they now know it's doable loselessly.

Re:Fractal image format

[Anonymous Coward]

And you've managed lossy compression of "little", but unfortunately your compression ratio was 0%. Better luck next time, fucking grammar nazi.