Eight-Point, Four-Point, And Sixteen-Point Garbage Matte Effects; Green Screen Key Effect; Image Matte Key Effect; Luma Key Effect - Adobe PREMIERE PRO 2 Manual

ADOBE PREMIERE PRO 2.0
319
User Guide
See also
"About the Difference Matte Key" on page 365
"To replace a static background behind moving objects" on page 365

Eight-Point, Four-Point, and Sixteen-Point Garbage Matte effects

The three Garbage Matte effects aid in cropping out extraneous portions of a shot so that you can apply and adjust
a key effect more effectively. The mattes are applied with either four, eight, or 16 adjustment points for more detailed
keying. Once you apply the effect, click the Transform icon next to the effect name in the Effect Controls panel.
This displays the garbage matte handles in the Program Monitor. To adjust the matte, drag the handles in the
Program Monitor or drag the controls in the Effect Controls panel.
See also
"To mask out objects with garbage mattes" on page 367

Green Screen Key effect

The Green Screen Key effect keys out all image pixels that are similar to a standard greenscreen, so that they become
transparent.
See also
"Blue Screen Key and Green Screen Key" on page 362

Image Matte Key effect

The Image Matte Key effect keys out areas of a clip's image based on the luminance values of a still image clip, which
serves as a matte. The transparent areas reveal the image produced by clips in lower tracks. You can specify any still
image clip in the project to serve as the matte; it does not have to be in the sequence. To use a moving image as the
matte, use the Track Matte Key effect instead.
See also
"Using the Image Matte Key" on page 364
"To composite clips using alpha channels or brightness values" on page 364

Luma Key effect

The Luma Key effect removes all the regions of a clip that have a specified luminance or brightness. The clip's quality
setting does not influence the Luma Key effect.
When the object from which you want to create a matte has a markedly different luminance value than its
background, you can make the background value transparent by keying it out. For example, if you want to create a
matte for musical notes on a white background, you can key out the brighter values; the dark musical notes become
the only opaque area.
See also
"About the Luma Key" on page 363