Original subtitles

In this clip we're going to go through a brief summary

of what we learnt in this module.

First we looked at pre-processing the green screen footage.

So we made sure that the green screen was nice and even and

that we removed any noise from that image.

We also did some white balancing,

that was to remove any color cast that might be still present.

We also blurred the chrominance channels,

that was just so that we can remove any artifacting

that might be present on our edges.

And that really makes for a better key.

Next we looked at pulling a key.

So we pulled a key with a Keylight tool and we used the Bg

input to composite in the new background image.

We were then refining the edge integration and the alpha channel.

So we wanted to make sure that those edge details were really

retained from the original image and that they blended really

well with that background plate.

We made sure that the alpha channel was nice and opaque where it needed to be

opaque and transparent where we needed it to be transparent.

So for example, in the reflection of our glass.

We then looked at adding a light wrap and the noise

back to finish the composite.

So the light wrap is any of the light details that is in our

background image that will be wrapping around the foreground

of our green screen image.

And noise is really to add back that detail that we lost

during the pre-processing workflow.

So that wraps us up for our NUKE Green Screen Keying

Fundamentals for these clips and modules.