JANUARY 02, 2003
Inner Outer Key
Your Chromakey alternative
 by Stephen Schleicher
Page 2 of 2

In the second example, we have a subject against a varied backdrop.

Using traditional keying to remove the backdrop here would be very difficult.
[an error occurred while processing this directive]Using a traditional keying effect to key out the background would be very very difficult, if not impossible. However, the Inner Outer Key handles the keying challenge without a problem.

Use masks to define the inner and outer ranges of the background once again.


The background has been removed from the image, while retaining must of the fine detail of the foreground subject.


The final key.


(Incidentaly, the background for the two examples were created using David Nagel’s custom Photoshop brushes which can be found elsewhere on this site.)

If you have a more complex clips - ones that have multiple foreground subjects - the Inner Outer Key gives you the ability to create multiple foreground and background masks, which give you greater control.

If you are having difficulty with your traditional keying process in After Effects, you might want to give the Inner Outer Key a shot, and it may solve your problem.

When not working deep in the labs of the DMN Central Division testing the latest and greatest software/hardware products Stephen Schleicher can be found at the local university teaching a few courses on video and web production. He can be reached at schleicher@mindspring.com. You can also visit him on the web at www.mindspring.com/~schleicher

Source: Digital Media Online, Inc.
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