GRASS VALLEY LDX 864K, Руководство пользователя

Страница: 62 / 122

62 LDX 86 High Frame Rate/HD/3G/4K Camera Platform User’s Guide (v2.0)
Chapter 4 - Video setup
4.3.2 Gamma curve
The gamma curve defines the distribution of tonal values. The following standard gamma
curves are available: ITU709 (default), BBC04, BBC05 and BBC06, ARD, Gamma-J and
Gamma-S.
Press the GAMMA button and select
GAMMA CRV
to select the gamma curve you want to use.
In the camera menu, navigate to the
PRODUCTION SETUP > LEVELS > GAMMA > CURVE
item
and select the gamma curve you want to use.
4.3.3 Gamma presets
The gamma preset selection determines how mid-range tonal values are reproduced. Available
gamma presets are:
• Nom (nominal) setting: Master Gamma = 76 (slope = 0.45)
• Lin (linear) setting: Master Gamma = 0 (slope = 1.00)
• Var (variable) setting: Master Gamma is adjustable between 0 (slope = 1.00) and 99 (slope
= 0.35).
Press the GAMMA button and use the
GAMMA SEL
item to select the Gamma preset.
In the camera menu, navigate to the
PRODUCTION SETUP > LEVELS > GAMMA > PRESET
function and select the Gamma preset from the list.
☞
Note
☞
Note
It’s also possible to change Gamma for each channel (R,G,B). Changing the slopes of the
individual color gamma changes the representation of white in the mid-range tonal values.
4.4 Contrast
4.4.1 Contrast adjustment
To create more or less contrast in the picture, luminance levels can be adjusted independently
for three tonal ranges: shadows, midtones and highlights.
OCP
CAM
OCP
CAM
Shadows Midtones Highlights