You could do a key on a specified range of hues using the keyer, using that as a mask for a grade node. That node manipulates the red(rgb->hsv first) would probably give you the results you're looking for?
Don't have nuke in front of me but I think that could work. Best regards, Elias Ericsson Rydberg måndag 9 juni 2014 skrev Martin Constable <[email protected]>: > Thats a good idea and actually something I already tried. > > After some fiddling similar results can be had. And the results themselves > are sometime comparable. > > However, it is very difficult to control and the effects is very likely to > spill over into other color values. Drawing an adjustment in ColorLookup > can offer more local control but is even more difficult to master. > > > > On 9 Jun, 2014, at 5:22 PM, Adrian Cruceru <[email protected]> > wrote: > > > Try this: > > > > Use a colorspace node to change the current color space from linear to > HSV then use a grade node to color correct just the red channel (which > becomes the Hue chanel after the colorspace node) then use a second > colorspace to get the colors back into the linear color space > > > > Any color correction applied to the red channel between the two > colorspace nodes will only alter the hue, so you cna compress it and change > it as you want > > > > Hope it helps > > > > Cheers > > > > Adrian > > > > > > On Mon, Jun 9, 2014 at 10:01 AM, Martin Constable <[email protected]> > wrote: > > Unforgivably I accidentally deleted the questions from the source file. > > > > They are: > > The questions must have got accidentally deleted. They are simple: > > - Can such an effect be easily achieved with existing tools? > > - Would you find such a tool useful? > > > > Apologies > > > > > > On 9 Jun, 2014, at 3:44 PM, Martin Constable <[email protected]> > wrote: > > > > > Dear Nuke users, > > > > > > > > > I am writing to you in order to ask for your help on a research > project that I am engaged in with here at Nanyang Technological University. > I hope you won't regard this as spam. > > > > > > I am working with some engineers on a tool whereby the local hue > contrast of a region may be expanded or compressed. Exactly what we mean by > this will take a bit of explanation which I hope is delivered in the linked > pdf. > > > > > > We are now hoping to publish and are looking for feedback from > professionals as to the usefulness and novelty of our approach. Ideally, we > would like people who have a special interest in color. > > > > > > A very short description is here, as is two questions we would like to > ask: > > > https://dl.dropboxusercontent.com/u/3788380/HUE_TOOL_FEEDBACK.pdf > > > > > > We are working to a tight schedule (deadline = this Friday 13th) and > do not have time for a full user study. However, one or two lines of > feedback will be very helpful, especially from users of your caliber. > > > > > > I thank you all sincerely in advance > > > > > > Martin Constable > > > > > > > > > > > > CONSTABLE Martin | School of Art Design and Media | Nanyang > Technological University > > > 3-21, 81 Nanyang Drive, Singapore 637458 > > > Tel: (65) 6316-8729 GMT+8h | HP: (65) 9329-4064 | Fax: (65) 6795-3140 > | Email: [email protected] > > > > > > > > > > > > _______________________________________________ > > > Nuke-users mailing list > > > [email protected], http://forums.thefoundry.co.uk/ > > > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > > _______________________________________________ > > Nuke-users mailing list > > [email protected], http://forums.thefoundry.co.uk/ > > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > > > > > > -- > > Adrian Cruceru > > df(x) > > _______________________________________________ > > Nuke-users mailing list > > [email protected], http://forums.thefoundry.co.uk/ > > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _
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