Microscan MS-4X User Manual page 256

Pixel Sub-Sampling
AEC/AGC Mode
Note: AEC/AGC Mode is only applicable to the High Speed version of the MS-4X.
Definition: AEC/AGC Mode (Automatic Exposure Control/Automatic Gain Control
Mode) maintains optimal self-adjusting exposure and gain settings. This
ensures that acquired images fall in a desirable region of the camera's
sensitivity range for optimal image luminance.
Usage: <K542,pixel
Default: Disabled
Options: 0 = Disabled
2 = AGC
AEC
AEC enables Automatic Exposure Control. In this mode, the optimal setting for exposure
(shutter) is computed and updated for every frame. It may take several frames to adjust
the shutter value to the correct setting. The current camera shutter parameter is updated
at the end of the read cycle (see
Note: The minimum (slowest) shutter setting will not exceed the frame read-out time of the
current image dimension. For example, a full-size image has a minimum frame read-out
time of 15 ms. Therefore, the slowest shutter that can be achieved is 15 ms, or 1/67.
AGC
AGC enables Automatic Gain Control. In this mode, the optimal setting for gain is
computed and updated for every frame. It may take several frames to adjust the gain
value to the correct setting. The current camera gain parameter is updated at the end of
the read cycle (see
AEC/AGC
AEC/AGC enables both Automatic Exposure Control and Automatic Gain Control. In
this mode, the optimal settings for exposure (shutter) and gain are computed and updated
for every frame. It may take several frames to adjust the shutter and gain values to the
correct settings.
Important: In this mode, only the Automatic Exposure Control (AEC) is active while the
gain value remains fixed at its minimum setting. The Automatic Gain Control (AGC) only
becomes active if the AEC has driven the shutter value to its minimum (slowest) setting
and the desired image brightness has still not been obtained. When this occurs, the shutter
value will remain fixed while gain is adjusted. The current camera shutter and camera gain
parameters are then updated at the end of the read cycle (see
AEC/AGC Brightness
Note: AEC/AGC Brightness is only applicable to the High Speed version of the MS-4X.
Definition: AEC/AGC Brightness allows the desired image luminance to be
adjusted within the range of 1 (darkest) to 56 (brightest).
Usage: <K542,pixel sub-sampling,AEC/AGC
Default: 30
Options: 1 to 56
10-16
sub-sampling,AEC/AGC
Camera
Camera Settings).
mode,AEC/AGC brightness>
1 = AEC
3 = AEC/AGC
Settings).
mode,AEC/AGC
Camera Settings).
brightness>
MS-4X Imager User's Manual