GRASS VALLEY LDX 864K, Руководство пользователя

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LDX 86 High Frame Rate/HD/3G/4K Camera Platform User’s Guide (v2.0) 63
Chapter 4 - Video setup
Press the GAMMA button, the NEXT button, the NEXT button again and switch on
CONTRAST
. Select
SHADOWS
,
MIDTONES
or
HIGHLIGHTS
to adjust the luminance level for
each range between 0 and 99.
In the camera menu, navigate to the
CREATIVE CONTROL > LEVELS > CONTRAST
menu and
switch
CONTRAST
on. Use the
SHADOWS
,
MIDTONES
or
HIGHLIGHTS
items to adjust the
luminance level for each tonal range between 0 and 99.
Values below 50 decrease luminance levels while values above 50 increase levels.
☞
Note
☞
Note
Contrast adjustment is always applied after Gamma.
4.4.2 Black Stretch
The Black Stretch function changes the level of tones in the shadow areas of the picture
without affecting the rest of the picture.
Press the BLACK button and switch on the
BLACK STR
item. Use the
BLACK LVL
item to
adjust the Black Stretch level from 0 to 99.
In the camera menu, navigate to the
PRODUCTION SETUP > LEVELS > BLACK
menu and
switch on the
BLACK
item. Adjust the Black Stretch level from 0 to 99 using the
BLACK STR LEVEL
function.
Values below 50 are Black Press, values higher than 50 are Black Stretch.
☞
Note
☞
Note
Black Stretch is applied independently from Gamma.
When Black Stretch is switched on the non-standard indicator in the viewfinder lights (only for
ocular viewfinders).
4.5 Knee
Knee is a function that compresses the wide dynamic range of the video signal coming from
the imager into the more limited video output range.
OCP
CAM
0 100
0
20
40
60
80
100
Black S tretch
Black Press
OCP
CAM