Christie DS+60 User Manual page 49

Brightness
Bright
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"Brightness" increases or decreases the amount of black in the image (0-100). For best
results, keep close to 50. Start with a high value and decrease so that dark areas do not
become black (i.e., are "crushed"). Conversely, high brightness changes black to dark
gray, causing washed-out images.
Gamma
Gamma
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"Gamma" is a global setting that determines how gray shades are displayed between
minimum input (black) and maximum input (white) for all signals. A good gamma
setting helps to optimize blacks and whites while ensuring smooth transitions for the
"in-between" values utilized in other colors. Unlike "Brightness" and "Contrast"
controls, the overall tone of your images can be lightened or darkened without
changing the extremes and all images will be more vibrant while still showing good
detail in dark areas when using the Gamma control.
The normal gamma setting of 2.2 is correct for virtually all signals and conditions. If
excess ambient light washes out the image and it becomes difficult or impossible to
see details in dark areas, lower the gamma setting to compensate. This will improve
contrast while maintaining good details for blacks. Conversely, if the image is washed
out and unnatural, with excessive detail in black areas, increase the setting. Again,
good gamma improves contrast while maintaining good details for blacks and whites
Filter
The proper filter setting is automatically set for virtually all
signals, and rarely needs to be changed. It applies a low pass
filter for noise reduction in the incoming input signal, particularly
for HDTV or SDTV. Applied in the analog domain before
sampling, this filtering removes high frequencies and thus
reduces pixel phase noise (note this also reduces signal bandwidth). Override only if
standard pixel tracking and phase adjustments do not adequately clear up a "noisy"
video signal, or if a graphics signal appears overly "soft". Both instances indicate that
"Filter" may be set to the wrong option.
Detail
"Detail" adjusts the sharpness of a video image so that edges remain clearly defined. It
can be particularly useful if a significant "Noise Reduction" adjustment has caused the
image to appear too soft. Adjust until the display is as sharp as desired, keeping in
mind that because "Detail" adds some high frequencies back into the image, it can
also re-introduce a certain degree of noise.
Noise Reduction
"Noise Reduction" is similar to the "Filter" control, but operates in the post-sampling
digital domain with a more subtle effect. Higher settings are most useful for clearing
up noisy RGB images such as those from a PC. Adjust as desired, keeping in mind
that reducing noise (which reduces high frequencies) may also soften the image.
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Christie DS+60 User's Manual
Section 3: Operation
3-25