The main area is quite simple, once the image has been split up into its primaries, secondaries and tertiaries, you have a set of mattes which are coloured back to the original colour. This is done with an offset from memory. This is already multiplied by the matte so it may already be relative. Not sure.
If not it may be a case of multiplying a constant by the matte. However I think I used to do that and it didn't handle values greater than 1. Anyway at the moment I haven't worked out how to do this without an expression node, which maybe the answer anyway. Howard > On 31 Mar 2017, at 5:50 pm, Howard Jones <how...@axis-vfx.com> wrote: > > Ok > Send anything back please and I can update the tool. > > Howard > >> On 31 Mar 2017, at 5:34 pm, motion artist <motionarti...@gmail.com> wrote: >> >> Thanks Howard! I'll experiment and see what I manage to come up with! >> >> All the best >> >> Stepan >> >>> On Thu, Mar 30, 2017 at 5:53 PM, Howard Jones <how...@axis-vfx.com> wrote: >>> Found this, I’d have to have a think but don’t wait up for it. >>> >>> https://www.dpreview.com/forums/post/26485128 >>> >>>> Relative - Changes the existing amount of cyan, magenta, yellow, or black >>>> by its percentage of the total. For example, if you start with a pixel >>>> that is 50% magenta and add 10%, 5% is added to the magenta (10% of 50% = >>>> 5%) for a total of 55% magenta. (This option cannot adjust pure specular >>>> white, which contains no color components.) >>>> Absolute - Adjusts the color in absolute values. For example, if you start >>>> with a pixel that is 50% magenta and add 10%, the magenta ink is set to a >>>> total of 60%. >>>> >>>> Note: The adjustment is based on how close a color is to one of the >>>> options in the Colors menu. For example, 50% magenta is midway between >>>> white and pure magenta and receives a proportionate mix of corrections >>>> defined for the two colors. >>>> >>> >>> Howard Jones >>> Visual Effects Supervisor >>> m: 07973 265624 | e: how...@axis-vfx.com | w: www.axis-vfx.com >>> >>>> On 30 Mar 2017, at 16:54, motion artist <motionarti...@gmail.com> wrote: >>>> >>>> Hello again >>>> >>>> So the Secondary Colour works a treat, but I was wondering how to >>>> implement the Relative vs Absolute option that the PS selective colour has >>>> in Nuke. It doesn't seem like anyone from the photoshop community knows >>>> exactly how this works. Has anybody tried reverse engineering that? >>>> >>>> Appreciate all the help >>>> >>>> All the best >>>> >>>> Stepan >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >>> >>> >>> >>> A X I S V F X >>> The Bottle Yard Studios >>> Whitchurch Lane >>> Bristol BS14 0BH >>> >>> axis-vfx.com >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users -- *A X I S V F X* The Bottle Yard Studios Whitchurch Lane Bristol BS14 0BH axis-vfx.com
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