Crystal Vision
Key Signals
External Mask
The External Key input when used as an External Mask combines with the other
keys as a logical ‘AND’ such that black areas take priority.
To force the BG picture to override the chroma key using the external key input
as a mask:
The mask signal above combines with the chroma key to force the composite to
BG in the black areas:
Or to override the chroma key in areas where the backdrop is missing, damaged
or poorly lit – typically the edges:
Safire 3 User Manual R1.3
70
24 March 2017
