5.5

Table Of Contents
1065Motion User Guide
Use the Luma Keyer filter
Intro to the Luma Keyer filter in Motion
The Luma Keyer filter pulls a key from an image or clip based on a selected range of image
lightness. Although typically used to key out a white background behind a foreground
subject, the Luma Keyer filter can also be used to generate creative effects by turning
a narrow range of image brightness transparent. The Luma Keyer filter can also isolate
rasterized logo and text graphics from a black or white background.
Luma keys are most effective when you’re keying a subject with a range of lightness
different from the area you’re turning transparent. For example, if you’re keying a black
background, the foreground subject should not have deep shadows or dark areas that
might get keyed with the background. Generally speaking, shadows and highlights in the
image usually make this a difficult filter for pulling a perfect key.
You apply a Luma Keyer filter like any other filter in Motion—from the Library or the Filters
pop-up menu in the toolbar. For more information about applying filters, see Apply or
remove filters in Motion.
For a description of the Luma Keyer filter parameters, see Luma Keyer filter controls
in Motion.