Imagine Selenio X50, Installation And Operation Manual, Page: 57 / 136

X50
Installation and Operation Manual
43
Note : Certain video/audio inputs and outputs can be disabled by the power-saving controls
under System Setup > Green (Power Save) . If a selection or a control related to an
interface is missing, check its power save status.
Color
Correction
The color corrector changes the following attributes of an input signal:

Gain

Offset

White Slope

Black Stretch

Gamma Correction
These parameters include “lock” options that make it possible for you to adjust all of the
options of a particular group in tandem, rather than separately.
White Slope
and Black
Stretch
The white slope is comprised of G White Knee , B White Knee , R White Knee , and GBR
White Knee Lock . Black Stretch includes G Black Knee, B Black Knee, R Black Knee ,
and GBR Black Knee Lock .
Component knees determine the amount of additional gain applied to segments at the
ends of the RGB transfer functions in the look-up tables.
The values displayed are a percent of the available correction. A positive white knee
increases the slope of the last 15% of RGB values, and decreases the slope of the preceding
15%. A positive black knee parameter will increase the slope of the first 15% of the
transfer function by the amount entered and decrease the slope of the next 15%, to return
to the unmodified transfer function. Each component knee is added to the total knee (the
sum cannot exceed 100%) to produce the correction applied to the respective component.