Table of Contents
Advertisement
Brightness
Bright
Press
(
SHORT CUT:
"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
(
Press
SHORT CUT:
"Gamma" is a global setting that determines what 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. Thus, 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.
Gamma is used to fine tune the gamma table currently in use, ranging from 1 – 3 (2.5
= default). 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. In high ambient light conditions, lower gamma may produce better results
than higher gamma. Gamma of 2.5 (default) indicates the gamma table has not been
adjusted. For more information, refer to Advanced Image Settings, Gamma Table
submenu. Again, good gamma improves contrast while maintaining good details for
blacks.
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
an
d adjust the slidebar.)
an
d adjust the slidebar.)
Christie DS+60/DW30/Matrix 3000 User's Manual
Section 3: Operation
3-25
Advertisement
Table of Contents
