To reduce colors into a "safe" gamut, you have to gamut map. In general, the better solutions to gamut mapping all have to affect some of the colors that are within the target gamut. So this is one explanation why automated tools might provide unsatisfying results in certain cases (even if the tool is already very well designed).
So I agree that grading with feedback is not a bad way to go, and may continue to be, even if better tools are built. There's probably still a role for automated tools, but probably not as much when you still have a time/opportunity to fix the problem with subjective grading. I'm not a video engineer, but I do recall seeing somewhere that illegal NTSC values are not as "dangerous" as they used to be, due to the way content is distributed now. But even if it's "safe" you still don't want colors unexpectedly clipping out of gamut, as this will produce banding artifacts. A tool to show values out of gamut with some form of "zebra stripe" might actually be a pretty good way to deal with this. http://en.wikipedia.org/wiki/YIQ - Andy On Tue, Oct 9, 2012 at 4:50 PM, Diogo Girondi <[email protected]>wrote: > Personally I never been too fond of those magic nodes to legalize color > values, they never really delivered the best results in my opinion. At > least in Flame, Smoke and Combustion they didn't. They had a tendency to > mess up with things as whole which wasn't ideal in most cases. So what use > to do was to color correct everything while looking at a Vectorscope. > > > cheers, > diogo > > > On Tue, Oct 9, 2012 at 7:44 PM, Dan Rosen <[email protected]> wrote: > >> I'm actually looking for safe color values for NTSC and not action & >> title safe. >> >> On Tue, Oct 9, 2012 at 2:29 PM, Diogo Girondi <[email protected]> >> wrote: >> > Here's the link to it >> > http://www.nukepedia.com/gizmos/draw/dguides/ >> > >> > Cheers, >> > Diogo >> > >> > On 09/10/2012, at 18:12, Dan Rosen <[email protected]> wrote: >> > >> > Any one have an equivalent to Shake's VideoSafe node? I'd like to make >> > sure some images are safe for NTSC and there was a nifty node in Shake >> > for that. Anyone have a gizmo or know of what node would do that in >> > Nuke? >> > >> > thx >> > Dan >> > _______________________________________________ >> > 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 >
_______________________________________________ Nuke-users mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
