Using the Luminance-Based Keys

Luminance-based keys use luminance (brightness) levels to define the transparent areas. You can choose to key out either the brightest or the darkest pixels contained in the image. Luminance-based key types include luminance, multiply, and screen.

The luminance key isn’t the only key type that uses luminance to define transparency, but it’s probably the most commonly used (both in Premiere and in traditional editing suites). You may hear luminance keys generically referred to as luma keys.

To use the luminance key:

1.
Select a clip in a superimpose track, and choose Clip > Video Options > Transparency (Figure 13.24).
Figure 13.24. Select a clip in a superimpose track, and choose Clip > Video Options > Transparency. ...

Get Premiere 6.5 for Windows and Macintosh: Visual QuickStart Guide now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.