Gamma Setting (Lutc); Knee Compensation (Kn) - JAI AT-030MCL User Manual

Important Note:
If sRGB or Adobe RGB is used, please note the following procedure.
1) Achieve the white balance under the condition of D65 (6500K) illumination.
2) Gamma should be set at 0.45 and set the linear matrix at either sRGB or Adobe RGB.
3) Monitor should comply with sRGB or Adobe RGB color reproduction capability.

7.2.8 Gamma setting (LUTC)

The AT-030MCL has various gamma settings
including LUT (Look Up Table). Gamma can be
set OFF (1.0), 0.6, 0.45, or to exhibit
characteristics set using LUT.
The drawing in the right shows the typical
characteristics in the case of gamma ON
(0.6/0.45).
CCD out Analog Signal
Black Setup 3.6%, 25mV
200mV 700mV
800mV
230mV↑

7.2.9 Knee compensation (KN)

If the relation of input and output is linear (1:1), the
output signal is saturated at a certain level of the
input signal and details cannot be reproduced in the
saturated area. The knee compensation circuit
maintains linear output up to a knee point and
compresses the level after the knee point. This is set
by a knee slope function. AT-030MCL supports up to
200% signal compression by knee slope. Factory
default is OFF.
Functions
Knee Point
Knee Slope
AT-030MCL
Digital Out(36bit)
128LSB
3560LSB
4095LSB
Data length
12bit
16bit
1023
890
32 Black Level
0
25 Analog Signal [mV]
Fig.18. Gamma setting
Digital Out(30bit)
32LSB
890LSB
1023LSB
Fig.19. Example of Knee characteristics
Setting range
0LSB ～ 4095LSB
0(x0.0) ～ 16383(x0.99999)
- 18 -
White Clip Level
100% Level
700 835
Digital Out(24bit)
8LSB
222LSB
255LSB
Knee Slope
Knee Point
Video Input
Initial setting
3434
8000