Grass Valley Kayenne K-Frame v.7.0 - Manual (Page 85)

KAYENNE K-FRAME — User Manual 85
Chroma Key
image to cancel the splash or flare. Typically less than 2% of the backing
color is needed to neutralize the flare.
Extra Chroma Key Controls
Additional chroma key controls are available by touching the stage 4 Extra
Controls data pad ( Figure 43 ). Coring, fringe, and shadow controls can be
individually activated by touching the labeled buttons.
Figure 43. Extra Controls
Coring replaces any pixels in the luminance signal after primary suppression
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-