Re: [Openexr-devel] Introduction and CTL/ICC question

[Geraldine Joffre]

On Fri, 11 Mar 2005 14:59:06 +0100 (CET), Kai-Uwe Behrmann wrote
> Am 11.03.05, 07:09 -0500 schrieb Geraldine Joffre:
> 
> > I am under the impression that what you are after is the ability to handle 
> > tone 
and color 
> > reproduction of HDR images via ICC profiles. Is this correct? In this case, 
> > you 
may want to 
> 
> I saw such behaviour within Greg Wards photosphere application. Well 
> it is very different from the ICC concept of "one colour at one 
> time" handling. Tonemapping introduces frequencies, handling the 
> neighbourhood of colours as well.
No. Some tonemapping techniques do take into account the values of neighbouring 
pixels but many others do not. The TRC of a display profile for instance is a 
type of 
tonemapping, though not a sophisticated one.

> First I would like to adapt a tonemapping implementation to 
> CinePaint. Then I may go more seriously in such a discussion.
Well, I was just trying to guess what you want to achieve, which is still not 
clear to 
me.


Geraldine Joffre 
MultimediaPhoto Sarl