[Openicc] Fwd: Re: Krita color adjusting

[Chris Murphy]

On Jun 14, 2005, at 12:35 PM, Boudewijn Rempt wrote:

> On Tuesday 14 June 2005 20:22, Chris Murphy wrote:
>
>
>> But for peat's sake, please do not equate this profile as something
>> to use as the default profile for untagged images. That needs to be
>> either sRGB always, or a separate selection.

The brain is an interesting thing. Hmm. I haven't worked with peat in  
a while, not sure why I was thinking of it. Anyway...

>
> If you import an untagged RGB image into Krita and you have neither  
> a printer
> nor a monitor profile then it stays untagged; otherwise it's  
> assumed to be
> sRGB. Is that correct?

Default behavior should be to consider it sRGB. More advanced  
behavior would be to allow the user to tag it with something from a  
list of RGB profiles. And even more advanced would be a single dialog  
that would allow it to be tagged and then converted to whatever the  
edit space is.


> Fortunately there'll be nothing to preven someone from editing his  
> images in
> RGB. But if you want to paint with something that works like (like,  
> in a
> simulation of actual physics) real paint then you need to use the  
> wet &
> sticky color model in Krita. Of course, when rendered it's rendered  
> to RGB,
> and then is assumed to be sRGB if there's a monitor profile,  
> otherwise we
> cannot do a transform.

This would then be a subtractive model if its behavior is like paint.  
Red plus green would get you really dark mud, rather than yellow as  
in RGB. Is that how it works?


> We're going for channel-depth flexibility, too. But there's no way  
> I'm going
> to try to store wetness, viscosity, paint concentration and any of  
> possibly
> 120 color channel values in the same colorspace as 8-bit rgb  
> images... Krita
> is not just about colors on screen or on paper, it's also about the  
> feel of
> pushing real stuff around for the artist working with it.

Fascinating.

I have almost no bandwidth at the moment to play, but is this  
something that could be made to run in X11 on OS X?


Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)