JAI AD-081GE - Manual (Page 43)

AD-081GE
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10.3.13 Knee compensation
If the relation of input and output is linear (1:1), the
output level will be clipped at a certain input level
and cannot reproduce the details in the clipped area.
The knee compensation circuit can keep the linear
relation until the knee point, while after the knee
point the input signal is compressed to reproduce the
details. This compression area can be set by knee
slope. The AD-081GE can compress up to 200% input
video level. The factory default is OFF. Users may set
the appropriate values for knee point and slope
according to their applications.
Fig.31 Knee characteristics
Funcrtion Length Setting range
Knee Point 10bit 0LSB ～ 1023LSB
Knee Slope 12bit 0(x0.0005) ～ 4095(x2.0000)
10.3.14 Blemish compensation
The AD-081GE has a blemish compensation function.
In the factory, the data for blemish compensation is stored in the factory data. When the
blemish compensation is set to ON, the factory data is loaded. The user can store the
compensation data in the user area (1 to 3). When executing a blemish calibration, it can be
done for white and black blemishes. The user can also set the threshold of detecting blemishes.
Up to 32 blemishes can be compensated.
B/W
Defective Pixel
Fig.32 Conceptual drawing for blemish compensation
10.3.15 Digital gain
In high frame rate and high S/N modes, images from BW1 and BW2 are used interchangeably.
Accordingly, the intensity level of BW1 and BW2 should be identical.
AD-081GE has a digital gain function for this purpose. Please note that if sync mode is set as
Async, the settings of digital gain for BW1 are applied to BW2 settings.
Video Input
V
id
eo
O
ut
pu
t
Knee Slope
Knee Point