Christie M-Series User Manual page 68

Section 3: Operation
• GAMMA:
Select the base gamma table for a given source. Select from one of
the standard tables, a custom gamma function, or select an
arbitrary gamma table that has been downloaded to the projector.
NOTE: A separate PC utility is needed to do this.
The 2.22 curve is a power curve typically used to encode graphics
and video sources, see
'standard' curve (auto setup default) is a modified 2.22 curve with
a small linear section in the black that enhances the detail in
darker areas of the projected content. Typically standard or 2.22 is
used for all sources. Alternatively, if neither default is ideal, apply a simple gamma curve by defining a custom
power function and slope. Select Custom to enable the function and slope controls. For more complex non-
standard gamma curves, a user-defined curve created externally and downloaded to the projector can be used
(requires separate PC-based Arbitrary Gamma software application to create the table and the Web UI to
download it). NOTE: If any of these special user curves have been installed, their names will appear in the
Gamma Table pull-down list.
• GAMMA FUNCTION:
Defines the base gamma power curve used when the base gamma table value is set to "custom". This value,
combined with gamma slope setting determines the base gamma table to be used as the custom base table. The
curve is generally a power curve with a small linear segment at the bottom defined by the slope.
• GAMMA SLOPE:
This control defines a slope to be used for the base custom gamma table for a small section at the bottom of the
curve. This slope can be used to bring in or out the low level blacks in the image. This slope combined with the
gamma function, define the custom gamma table.
DETAIL SETTINGS:
Adjusts the sharpness of the image. Setting detail above the halfway point can introduce 'noise' in the image.
Lower settings can improve a noisy signal.
• DETAIL:
Adjust the sharpness of the image. Setting detail above the halfway-point can introduce noise in the image.
Lower settings can improve a noisy signal. This command does not take effect unless the minimum change
required in the Detail Threshold control is reached.
• TEXTURE ENHANCEMENT:
Applies texture detail enhancement based on adaptive horizontal, vertical, and diagonal large edge and small
edge enhancement processes.
• DETAIL THRESHOLD:
Selects a filter sensitivity to noise. A higher value may improve noisy sources especially for higher settings of
detail.
• DETAIL OVERSHOOT:
Minimizes ringing on the enhanced edges detail and texture effects.
• SPLIT SCREEN:
Allows a snap shot of the main image to be presented on the right side of the screen to allow
evaluation of advanced image processing features. All resizing controls are honoured on both images;
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Figure 3-30 - Gammma Curve. The
F 3-30 - G
IGURE AMMMA
M-Series User Manual
020-100009-02 Rev. 1 (04-2009)
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URVE