Technical information

AVT GigE camera attributes
AVT GigE Camera and Driver Attributes V1.3.1
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This document is a master document for all AVT GigE camera models and is NOT camera specific
Exposure
Auto
Auto algorithms use information from the camera’s current image and apply the
following settings to the next image. Large changes in scene lighting may
require several frames for the algorithm to stabilize.
If using ExposureMode = Auto, and GainMode = Auto simultaneously, priority is
given to changes in exposure until ExposureAutoMax is reached, at which point
priority is given to changes in gain. Adding simultaneous IrisMode = Video/
DCIris/PIrisAuto results in undefined, “race to target” behavior.
ExposureAutoAdjustTol – Uint32 – R/W
Tolerance in variation from ExposureAutoTarget in which the auto exposure
algorithm will not respond. Can be used to limit exposure setting changes to
only larger variations in scene lighting.
ExposureAutoAlg – Enum – R/W
The following algorithms can be used to calculate auto-exposure:
ExposureAutoMax – Uint32 – R/W
The upper bound to the exposure setting in Autoexposure mode. This is useful in
situations where frame rate is important. This value would normally be set to
something less than 1x10^6/ (desired frame rate).
ExposureAutoMin – Uint32 – R/W
The lower bound to the exposure setting in autoexposure mode.
Note

The camera must be acquiring images in
order for the auto algorithm to update.
Range: [0 – 50] Default: 5 Units: percent
Mean [Default] The arithmetic mean of the histogram of the current
image is compared to ExposureAutoTarget, and the next
image adjusted in exposure time to meet this target. Bright
areas are allowed to saturate
FitRange The histogram of the current image is measured, and the expo-
sure time of the next image is adjusted so bright areas are not
saturated. Generally, the Mean setting is preferred
Range: [Camera dependent] Default: 500000 Units: μs
Range: [Camera dependent] Default: Camera dependent Units: μs