In Gonzalo’s class we were given the task of doing some roto on around 100 or so frames of animation regarding a man running down a bridge where both the man and bridge were meant to be cut out.
I started out with getting a roto for the ground and pillars on the bridge as the camera isn’t quite a still and would need to be tracked. I made a track and then had it tracked fairly well as while there is movement on the camera, it’s very subtle and doesn’t move a whole lot.
I managed to get a roto of all parts of the bridge and afterwards went about slightly adjusting and matching the tracker’s movements onto the roto coordinates.
Afterwards i went about attempting to track portions of the guy running’s body in an attempt to make rotoing slightly easier as opposed to moving the roto every 5 or so frames but this ended up not working in the end and ended up scrapping the tracks.
I went about breaking the roto into different sections of the body to get a bit more control, starting with separating the legs into four different roto portions.
Afterwards i went on to doing the chest and torso portions to try and separate out the roto to get more overall control.
Lastly i went about separating the arms and head from the roto, as I’ve learned prior that using as few points as possible and separating it into as many shapes as possible gives both more control over a roto and makes it easier to do as you’re not tweaking thousands of points.
This is what the alpha looked like on just the guy running, as well as what the mask looked like on him while moving.
Next i combined the alphas using a merge and this was the result of that. I plan later on to do some more experiments with just refining the roto, feathering in places and getting both the feet and hands, but as this was mostly just to experiment with how Nuke’s roto works, for now i’m content with it.