Keying Effects - Adobe 65021048 User Manual

ADOBE PREMIERE PRO CS3 335
User Guide
Color Replace effect (Windows only)
The Color Replace effect replaces all occurrences of a selected color with a new color, preserving any gray levels.
Using this effect, you could change the color of an object in an image by selecting it and then adjusting the controls
to create a different color.
See also
"Replace a color" on page 273
Gamma Correction effect
The Gamma Correction effect lightens or darkens a clip without substantially changing the shadows and highlights.
It does this by changing the brightness levels of the midtones (the middle-gray levels), while leaving the dark and
light areas unaffected. The default gamma setting is 1.0. In the effect's Settings dialog box, you can adjust the gamma
from 0.1 to 2.8.

Keying effects

Alpha Adjust effect
Use the Alpha Adjust effect in place of the Opacity effect when you need to change the default render order of Fixed
effects. Change the opacity percentage to create levels of transparency.
The following Alpha Adjust effect settings let you interpret the alpha channel in the clip:
Ignores the alpha channel of the clip.
Ignore Alpha
Reverses the transparency and opaque areas of the clip.
Invert Alpha
Blue Screen Key effect
The Blue Screen Key effect makes all image pixels that are similar to a standard bluescreen transparent.
See also
"About Blue Screen Key" on page 371
Chroma Key effect
The Chroma Key effect keys out all image pixels that are similar to a specified key color. When you key out a color
value in a clip, that color or range of colors becomes transparent for the entire clip. Control the range of transparent
colors by adjusting the tolerance level. You can also feather the edges of the transparent area to create a smooth
transition between the transparent and opaque areas.
April 1, 2008