2008-03-24

Quick Informal Poll on Gamma Stuff


"Sponza Overgrown" (more here)

A discussion recently came up on CGTalk about gamma correction.

Since I have an Autodesk Masterclass at SigGRAPH 2008 which touches briefly on the subject, I was thinking if I should, by "popular vote", actually expand that section of the masterclass, perhaps shave off some other things and talk more about Gamma?

Technically, the agenda is already "set" but I could perhaps be flexible?

What do you think? Do you plan to go to SigGRAPH 2008 in L.A.? Would you attend the Masterclass, and if so, would you want to hear more about Gamma stuff? Or would you rather hear about the other things?

Please post a reply to this blog post with your preference.

To be clear: This question is about SigGRAPH in particular. Gamma is a topic I'll be adressing quite a lot here, to the point of making a whole website about it. So it's not like there will be any shortage of online info.

(Btw, I also co-teach on a "HDRI-for-artists" SigGRAPH course)

/Z

16 comments:

ovendelon said...

Please do talk and explain as much as you can about gamma! I'm running all around the office here and spreading the word (just like in a religion). It is strange that this thing which looks so obvoius now, needs to be enforced.. Anyway sorry for my english, and for the offtopic. Please do talk on siggraph, i hope i'll find the notes somewhere on the net afterwards. Thanks for everything you do for the community.

Michael said...

There seems to be something enigmatic about gamma for many people, and I am having a similar issue as the preivious commentor...trying to get co-workers on board with it.
There is a bit of fear of the unknown for some people when it come to Gamma so I agree, I see good value if you can fit in a bit more info to help explain the workflow and benefits.

Glacierise (a.k.a. Hristo Velev) said...

There are simply a lot of people that haven't followed the development of things, and are for some reason not doing a search-read routine good enough. I'd say it would be great if you compile a whitepaper of all the developments and explanations from the past, and put it somewhere high up with BIG letters. Anything more would be an overkill, I think. and no, I'm not going to Siggraph.

Danield said...

I am going to Siggraph, and I would like to hear an expanded presentation on Gamma. It is one of those topics that I think I understand, but at the same time have nagging doubts about.

Scott said...

Yes! please do. I'm also having a hard time getting everyone in the office to update to this workflow as well. It's too important to a good workflow to not go over it.

iggy said...

Gamma is widely misunderstood and the Masterclasses have degraded to more like 101 classes you find at AU so if you can, it would be great to add more value by presenting gamma in a new light (pun intended).

Garry said...

Hi Zap,

I won't be at Siggraph (one year maybe) but I would love to find some practical examples of how to set up a and use a linear workflow for my day to day work. Theory is great, but actually having it working in front of my eyes would be so beneficial.

gindin said...

I won't attend Siggraph, but I would LOVE to see a detailed discussion of the subject.

I think I understand it & apply it correctly to my workflow, but I'd love to get a confirmation to what I'm doing.

If you could also address the integration of CG & Video/film from the Gamma/response curve aspect it would also be great.

Philip said...
This comment has been removed by the author.
Philip said...

I remember last year; Jeff Patton got into some of the gamma setting in Max, how to set it up and such. I think Gary Davis touched on the topic but I think his was more file format and color theory. Hahah, as I am typing I am reading Jeff's PDF it states "This is a technique I learned from HÃ¥kan "Master Zap" Andersson."

Count me in!

floze said...

I wont attend the SIGGRAPH this year (though I would LOVE to be there), but the gamma issue is so incredibly substantial and misunderstood that it imho does have priority over anything else, specifically in mental ray where the user is left quite alone with this whole issue. Once people have an understanding of how to work in the right space they can go further from there on, thats my two centos. :)

You essentially changed my view at the cg world, Zap (and thank you for that!), do it again with all the fellas out there!

David said...

I am not sure I will attend this year, bit far away for me to plan it yet. However, I agree with the earlier comment that a great many of the Masters Classes are far from teaching "mastery". This class would certainly be welcome and even necessary to bring the series up to par with what we'd expect from a Master's Class. And even if I didn't go, I could get the information from someone that did go.

So yes, please!

Mathieu said...

Thanks!

[BSOD] said...

would love to go but i dont think our company with stretch to LA. any chance of something in europe covering similar topics

cheers

matt

Borko Panov said...
This comment has been removed by the author.
Master Zap said...

It has a little to do with CRT's, in the sense that CRT's were a happy accident where they physics of electron guns just happened to (roughly) match human perception, and then became the "standard" for how you translated a voltage into a brightness on screen.

Why? Because a cool side effect of this is that it actually supresses image noise, because a linear encoding of brightness to voltage would have horrible noise problems.

Same applies to digital transmission; linear 8 bits is totally unusable. The nonlinear encoding (i.e. gamma) is a *necessity* for 8 bits to be even usable. At all. Just as 8 bit linear AUDIO is unusable, yet all our telephones use 8 bit... but a NON-linear encoding known as "uLaw", that is remarkably simlar to a gamma encoding...

/Z