If you want a resul more Photoshop like you could add a sRGB gamma curve to the 
linearized input, invert it and then set the gamma back to 1.

On Fri, Jul 12, 2013 at 2:01 AM, Darren Coombes <[email protected]>
wrote:

> Hi everyone, when you invert an image in nuke, it never seems to be an exact 
> invert, now I'm guessing that if I've got my viewer set to sRGB, it's never 
> going to look like an exact invert due to the math between linear and sRGB. 
> Am I correct with this? And how would you go about correcting the conversion? 
> Would it be a gamma correction or is there more to it?
> Thanks.
> Thanks.
> Darren Coombes
> Check out some of my work...
> www.vimeo.com/darrencoombes
> Mob:  +61 418 631 079
> Skype:  darrencoombes
> Twitter:  @durwood81
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