Technical information

AVT GigE camera and driver features

AVT GigE Camera and Drivers Features V2.0.0

This document is a master document for all AVT GigE camera models and is NOT camera specific

If using ExposureAuto = Continuous, and GainAuto = Continuous

simultaneously, priority is given to changes in exposure until ExposureAu-

toMax is reached, at which point priority is given to changes in gain. Adding

simultaneous IrisMode = Video/DCIris/PIrisAuto results in unde-

fined, “race to target” behavior.

You can configure the auto exposure feature to respond only to a subregion

within the image scene. This subregion can be configured with the DSPSub-

region feature.

ExposureAutoControl

ExposureAutoAdjustTol [Integer] R/W

Tolerance in variation from ExposureAutoTarget in which the auto expo-

sure algorithm will not respond. It 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 [Integer] R/W

The upper bound to the exposure setting in auto exposure mode. This is useful

in situations where frame rate is important. This value would normally be set to

something less than (as a rough estimate)1x10

/(desired frame rate).

Continuous The exposure time will vary continuously according to the

scene illumination. The auto exposure function operates

according to the ExposureAuto and DSPSubregion

controls

other The exposure time will be controlled by an external signal

appearing on Line1 or Line2. In order for this feature

to work, TriggerSelector = FrameStart and

TriggerSource must be set to Line1 or Line2

Note



The camera must be acquiring images in order

for the auto algorithm to update.

Range: [0–50] Default: 5 Unit: Percent

Mean [Default] The arithmetic mean of the histogram of the cur-

rent 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

exposure time of the next image is adjusted so bright

areas are not saturated

Range: [Camera dependent] Default: 500000 Units: µs