Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 412)

412 Zodiak — User Manual
Section 5 — System Operation
Other Chroma Key Controls
Additional chroma key controls are available by touching the stage 4 Other
data pad ( Figure 287 ). Coring, fringe, and shadow controls can be individ-
ually activated by touching the labeled buttons.
Figure 287. Other Controls
Coring replaces any pixels in the luminance signal after primary suppres-
sion that are below the adjustable threshold with black. This eliminates
noise resulting from incomplete suppression. While coring can improve
some keys, it can easily be over done. Coring thresholds much above black
will affect dark grays that are actually part of the foreground subject,
making the chroma key composite look unnatural.
Fringe is used to restore color to the gray portions of the foreground color
resulting from secondary suppression adjustments. This control is only
active when secondary suppression is on.
Shdw provides controls of shadows that fall on the backing. Shadow Clip and
Shadow Gain allow selecting the range of the luminance portion of the fore-
ground that produces a shadow. Shadow Density is an opacity control for the
shadow and adjusts how much shadow is added to the background.