Christie M Series User Manual page 72

• 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.
A separate PC utility is needed to do this.
NOTE:
The 2.22 curve is a power curve typically used to encode graphics
and video sources, see
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 Gamma Function from the drop down list to enable the Gamma Function and
Gamma 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).
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 Gamma Function. 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.
M Series User Manual
020-100009-04 Rev. 1 (10-2009)
Figure 3-30 Gamma Curve. The 'standard'
Section 3: Operation
F 3-30 G C
IGURE AMMA
If any of these special user
NOTE:
URVE
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