Grass Valley Kayak HD v.6.9.3 - Manual (Page 65)

Kayak — User Manual 65
Keying
Figure 29. Incorrect Key with Dark Halo
Figure 30. Incorrect Keying with Shaped Input
In this case the shaped input is incorrectly shaped again, sometimes called
a double-multiply. Luminance Key was used for shaped key fill signal.
When the DPM provides an unshaped video output but the key is pro-
cessed as though it were shaped, excessive luminance occurs where the key
fill video and key hole edges overlap, producing a white halo around the
key. Additive Key was used for unshaped key fill signal.
8447_06r0
x
+ Invert
Background Key Hole in Background
Key Control
Shaping Circuit On
Doubly-Shaped
Video
Incorrect Key
with Dark Halo
Shaped
Key Fill
x
Correct Key
0618_00_34