Ultimatte-9 Operations Manual
March 1, 2000
37
Figure 14: Veil / Over Exposure Menu
XI. VEIL / OVER EXPOSURE MENU
When the lighting on a set is not even, usually the top portion of the backing gets overexposed as the
camera iris is adjusted to get proper exposure on the foreground subject. As the backing color (the
primary color of the backing) reaches overexposure level, its color begins to change. This change in
backing color results in matte values that are lower than those obtained from the well lit portions of the
screen. As a result, the top portion of the screen will look darker and discolored in the final composited
image. The only solution was to use Clean Up, which resulted in loss of fine FG detail and loss of
shadows.
The Over Exposure correction feature in the Ultimatte-9 is an alternate way of solving the above-
described problem without losing fine FG detail or shadows. The Over Exposure correction feature work
best when the white clip of the camera has a sharp knee.
1. Over Exposure Level
This control sets a threshold in the matte signal above which the screen is considered
overexposed. Adjust this control while viewing the matte.
2. Over Exposure Threshold
This control sets a threshold in the backing color beyond which it will be considered overexposed.
Adjust the Over Exposure THRESHOLD control while viewing the composited image.
3. Red Veil
This control is a manual override of the red component of the automated circuit that suppresses
the color of the backing in the BG area of the composite image.
4. Green Veil
This control is a manual override of the green component of the automated circuit that
suppresses the color of the backing in the BG area of the composite image.
Online [ 1, 2, 3, 4 ] Active ( 2 ) FILE=
RETURN
Over Exposure
Level
UM9-
Veil / Over Exposure Menu
CLEAN UP/
SHADOW
MATTE
SIZING
SCREEN
COLOR
Over Exposure
Threshold
Master Veil
Blue Veil
Green Veil
Red Veil
EXPOSURE
OFF
ADVANTEDGE
%
%
%
%
%
%
(COLOR) BACKING
