[Sidefx-houdini-list] OT: sRGB to linear question

Ivan DeWolf ivan at martian-labs.com
Tue Jul 8 12:46:30 EDT 2008


interesting... I tested this, scaling the dali lama image in Houdini and Nuke.
Houdini's compositor did get it wrong, but nuke nailed it. the image looked way
meffed up in the GUI if you zoomed in and out on it. 


Quoting Edward Lam <edward at sidefx.com>:

> sRGB is NOT any worst or less accurate. It's what you might do with the 
> non-linear image that *might* be a problem. For a striking example of 
> what can go wrong if you perform image algorithms that assume linear 
> space with non-linear images, see this link:
>     http://www.4p8.com/eric.brasseur/gamma.html [1]
> 
> As usual, it's only a problem if you don't know what you're doing. :)
> 
> Cheers,
> -Edward
> 
> 1. Note that (AFAICT) the author of the link doesn't try properly gamma 
> calibrate the software he tests.



-Ivan

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"Perfection is achieved when nothing else can be removed"
-Yvon Chouinard



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