I often use the HueShift node to smoothen skin tones. But I find it difficult to configure it for other hues. And I have to key out the skin first. I recall now that there is a gizmo for a Hue-vs-Hue curve approach on Nukepedia: dg_HSLTool v1.0
After playing with it for a minute I guess that would do most of what I expect in that regard. But maybe the tool you are developing is even easier to adjust. I would like to see it in action some day. Best, Anselm -------------------------------------------- Anselm Lier Haslerspitzstr. 5 81673 München Phone: +49 (0) 151 165 178 38 Mail: [email protected] Am 10.06.2014 um 06:18 schrieb Martin Constable <[email protected]>: > I don't know the HSV tool very well. Always understood it as Photoshop's Hue > Sat adjustment on steroids. > > But... as far as I am aware the HSV tool can: > - Replace hue > - Cycle the hue values > > As with the 'perform contrast adjustment on the H channel' method, it is > difficult to stop the effect spilling over into neighbouring hues. > > Functionally, it seems simply to take one hue value and replace it with > another. The docs are a bit zen on the exact function of the range slider > parameter, but it seems to spread the source color range. > > Our tool does something like this: It takes a user defined contiguous > selection of the hue histogram and stretches (or compresses) it. > > I have compared the two results using the Vector Scope and the effects are > clearly different, though I admit that currently our approach can produce > 'gappy' histograms (I am assured that this is solvable). > > > Thanks for the feedback Diogo! These are very useful comments. > > > > On 10 Jun, 2014, at 11:47 AM, Diogo Girondi <[email protected]> wrote: > >> Perhaps I'm missing something, but isn't that what the HSVTool does? >> >> >> cheers, >> Diogo >> >> >> On Mon, Jun 9, 2014 at 12:16 PM, Elias Ericsson Rydberg >> <[email protected]> wrote: >> 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 >> >> _ >> >> _______________________________________________ >> 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 > > _______________________________________________ > 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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