Clean mode

In a luminance key, linear key or color vector key, you can enable the clean mode. When the clean mode is on, the key source does not affect the key fill, which is added unchanged to the background. This improves the keyed image quality, but means that the part of the key fill signal which is not to be inserted must be completely black, or it will color the background. You set the clean mode with the Type menu of the respective keyer. (See “Setting the key type in a menu” (page 379).)

Note that in the following situations, the clean mode goes off, and cannot be turned on.

When the key type is a pattern key

When key inversion is on

When the key fill is a matte

When the key edge is an outline

When the key edge is normal with soft edge being on

When fine key is on

When the key positioner is on

Chroma key

A key signal based on a particular color is used to cut out the background, and the key fill is then inserted. The inserted signal is also referred to as the foreground, and the composite image is called a chroma key image.

 

 

 

 

 

 

 

 

 

 

 

 

Foreground

 

 

 

Background

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chroma key image

Normal mix and additive mix

In creating a chroma key image, either a normal mix or an additive mix can be used. To select which, use the Type >Chroma Adjust menu for the keyer. (See “Chroma Key Composition” (page 381).)

Keys 49