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)
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