Filter
Top Products
Section 3: Operation
RPMSP & CSP70-D100U User’s Manual 3-23
.
will not be as bright as they could be and the overall image will be dim. For best
results, start with a low value and increase so that whites remain bright but are not
distorted or tinted, and that light areas do not become white (i.e., are “crushed”).
NOTE: If the environment lighting changes, an adjustment of Gamma is
recommended (see below).
Brightness
(
SHORT CUT: Press
Bright
and adjust the slidebar.)
“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.
NOTE: Adjust brightness before adjusting contrast, since the brightness setting will
have an affect on contrast.
Gamma
(
SHORT CUT: Press
Gamma
and adjust the slidebar.)
“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”