Christie DS+5K User Manual page 58

Section 3: Operation
3-32 User's Manual
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Advanced Image Settings
Use the Advanced Image Settings
submenu to make the
adjustments necessary for lesser-
used but more specialized
applications on your projector.
This control
GAMMA TABLE:
applies a default video, graphics
or simple gamma table or "curve" to your
images, controlling the intensity of midlevel
colors and producing maximum contrast,
brightness and color performance. As
shown at right, the graphics curve is a
simple power curve while the video curve
has a linear segment near black to compensate for increased black levels typical of
video signals. A simple gamma curve is a value of 2.2 and is correct for most signal
conditions. Although the projector automatically applies either the graphics or video
curve according to what type of incoming signal is detected, in some cases you may
wish to override this default and use graphics gamma for a video source or video
gamma for a graphics source. Alternatively, if neither default is ideal, you may prefer
to apply the simple (non-optimized) gamma curve or a user-defined custom gamma
curve that has been created externally, named, and downloaded to the projector
(requires separate PC-based Arbitrary Gamma and KoRE Librarian software
applications). If any of these special user curves have been installed, their names will
appear in the Gamma Table pull-down list.
Keep in mind that any Gamma Table choice sets the related Gamma value (shown in
the Image Settings menu) to a 2.2 default, where it can be fine-tuned as desired.
Different values (1-3) here indicate that the original gamma table has been adjusted
with either the Gamma slide bar or direct key.
SELECT COLOR ADJUSTMENT:
choose an overall color palette for all images. The "Max
Drives" factory default simply drives all 3 colors at their
maximum level so that they are fully on and cannot be
changed. The two other pre-defined color adjustment
choices—SD Video and HD Video—apply a color gamut
optimized for video sources (standard or high-definition).
Alternatively, you can specify a color temperature. This
enables the adjacent Color Temperature slide bar and applies
its current setting (default = 6500K). If none of the pre-defined "Select Color
Adjustment" options or color temperatures suit your application, select one of four
color gamuts previously defined by a user (User 1, 2, 3, 4). A "User" option applies a
customized color performance in which the user has precisely set the hue and intensity
of each color component in the Color Adjustment by X/Y or Color Saturation
submenus. It is most often needed with multiple-projector applications. Select the
— SUBMENU
In "Select Color Adjustment",