Nuke: Keyer

Keying is an easy and quick way of pulling a matte on a plate which can preserve many details, such as strands of hair, as opposed to rotoscoping.

Types of Keys.

Different keys are available for different situations. For example;

Red/Blue/Green Keyer: These allow you to adjust the alpha for pixels depending on their Red/Blue/Green values.

Red/Blue/Greenscreen: These allow you to adjust the alpha of pixels are predominantly the colour in question, as opposed to the individual R, G, Or B value of a pixel.

Luminance: This allows you to pull a matte based on the brightness value of a pixel. Good for removing a bright sky.

These are the main ones you will likely be using.

How to use.

A keyer will always pull a matte to the Alpha channel by default, so you will want to view the alpha channel in the viewer to see what you’re doing,

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s