Christie CineIPM-2K, Руководство пользователя

Страница: 50 / 122

OPERATION
3-24 Cine-IPM 2K User’s Manual
020-100164-01 Rev. 1 (01/08)
NOTE:
If the environment lighting changes, an adjustment of Gamma is
recommended (see below).
Brightness
(
SHORT CUT:
Press an
d 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.
Gamma
“Gamma” is a global setting that defines 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 settings
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 fine-tunes the gamma table currently in use, ranging from 1 – 3 (default =
2.22), indicating that the chosen gamma table has not been adjusted). 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
unnatural with excessive detail in black areas, increase the setting. For more
information, see Gamma Table. Again, look for contrast
and good details in very
dark areas.
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.