6.0

3D Effect Parameters
718
Defocus
Defocus gives you the ability to blur the image or to blur individual layers of a matte effect. You
can use Defocus to create an effect in which the incoming media “fades in” to focus.
When you enable Defocus, the default command is Internal and default values are 10 for Horz
(horizontal) and Vert (vertical). This produces a slight softening effect.
Defocus supports RGB processing for all defocus types except Key Blur. If you select Key Blur
from the Type menu, RGB processing is no longer available.
Command Description
Type menu Click to select the type of defocus that your Avid editing application applies. Key
Only, FG and Key, and KeyBlur are available only on three track effects such as Matte
keys and Titles promoted to 3D.
The following options are available:
• Internal — blurs the entire image.
• FG (foreground) Only — blurs only the foreground of a two-track or three-track
effect.
• Key Only — blurs only the key in a three-track effect.
• FG and Key — blurs both the foreground and the key in a three-track effect.
• Key Blur — uses alpha channel values as a template for blurring the foreground
image.
When you select Key Blur, your Avid editing application blurs the foreground in
proportion to the opacity of the matte. Black matte values cause no blurring, while
white matte values cause maximum blurring.
You might use this effect to selectively blur part of a foreground image, such as a
face, by creating a moving matte for the area of the image you want to appear
blurred. Use the Offset parameter to control how much of a blur Defocus applies
to the face. You could also use a KeyBlur matte to create a soft-focus area around
a foreground subject.