BM-500GE / BB-500GE
40
9.2.2 R/L channel balance ( Register 0xA0B8, 0xA0BC )
BM-500GE/BB-500GE has dual-tap readout architecture, with a Left (L) and Right (R) channel.
In order to achieve the same gain and black level for both channels, the BM-500GE/BB-500GE
has built -in R/L channel balance function. The function is activated by a “one-push”
software command.
Note: R/L channel balance must be set at Normal mode.
9.2.3 Automatic Gain Control
This is the function to keep a constant output level in accordance with ambient brightness
changes. This function set AGC ON or OFF.
Note: This is available only in Normal mode.
9.2.4 Programmable Look UP table (LUT)
BM-500GE/BB-500GE has a programmable look-up table (LUT) that can be used to adjust the
transfer function of the video output. In other words, LUT can be used to create a user
defined Knee or Gamma function.
In order to get a desired set of characteristics, LUT Values should be set at each LUT Index (0
to 255).
The LUT consists of a data table of each gain which corresponds to all possible CCD outputs. T
In the Control Tool, each LUT Value is displayed as a coefficient (actual LUT value/4096).
Signals multiplied by these LUT coefficients create the desired output signal characteristics.
The look up table has 256 setting points of 14 bits covering the full range of input signals. On
each point, the gain can be set to get desired output characteristics. Gr, R, Gb and B signals
in BB-500GE have the same characteristics.
The Look Up Table is handled in a 14-bit Video Process circuit and a processed signal is output
as a 8-,10- or 12-bit pixel format through GigE interface.
Fig.27 LUT default setting ( Coefficient : x 1.0=4096)
CCD Out
Video Process
14-bit
GigE Interface
Pixel format
8-bit, 10-bit, 12-bit
(X4.0)
(X3.0)
(X2.0)
(X1.0)
(X0.5)
(X0.25)
LUT Value
(Coefficent)
0
255
LUT Index (D000 to D3FC)
1024
2048
4096
8192
16384
Video Inout
V
id
eo
o
ut
pu
t
Gamma=1 (OFF)
Γ
Look Up Table Default setting
Video IN/OUT characteristics
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