Friday, June 7, 2013

NUK222 keying exercise

fxPHD April term courses are running nicely. I tested some different approaches in keying scanned film footage from NUK222 class and got pretty decent results. Main problems were edge boiling due to film grain and restoring hair detail but with some fiddling I got an ok result for hair and pretty nice edge for dark jacket.

This is the original and my result on neutral background (click for pixel-per-pixel zoom):

Node graph:

I tried to keep node graph organized and tidy. Key section pulls the main key with two Keylight nodes and inputs from different denoising. Hair matte manipulation is for main hair detail from keyers and blurs and erodes the edge for blending with hair element from hair detail section. Hair detail generates non-alpha hair that is comped onto background under fg. Jacket patch is for removing boiling on the dark jacket edge. It could be made simpler by patching the key instead, at the moment it generates a jacket-colored patch that is comped under fg to fill edge holes.


  1. Hi Dude!
    Nice Job.
    Im learning keying in nuke. actually im looking the workflow about the hair cuz i have some trouble with that.

    if you dont have problem, can you share ur project?
    I will appreciate.

    1. Thanks!

      I don't mind sharing the project, send me an e-mail (you can find my address in About Me section on top of page), and I will send you the Nuke project file. I assume you also took the NUK222 course?

  2. hi dear

    Thank u for your explain
    I'm search keying work in nuke
    I can't solution so i've looked internet
    I want to find the answer to the problem from your nodes
    Can i get your nuke project ?

    ps. sorry, I'm not good at writing English