Technical information

AVT GigE camera attributes

AVT GigE Camera and Driver Attributes V1.3.1

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

Gain

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 2-3 frames for the algorithm to stabilize. The camera must be acquiring

images in order for the auto algorithm to update.

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 Video/DCIris/PIrisAuto

results in undefined, “race to target” behavior.

GainAutoAdjustTol – Uint32 – R/W

Tolerance in variation from GainAutoTarget in which the auto exposure algo-

rithm will not respond.This attribute is used to limit auto gain changes to only

larger variations in scene lighting.

GainAutoMax – Uint32 – R/W

The upper bound to the gain setting in auto gain mode.

GainAutoMin – Uint32 – R/W

The lower bound to the gain setting in Auto gain mode. Normally this number

would be set to zero.

GainAutoOutliers – Uint32 – R/W

With GainAutoTarget as the mean target brightness, GainAutoOutliers is the

percentage of pixels on the upper bound of the image brightness distribution

graph that are ignored by the GainAuto algorithm. This can be used limit the

effect of small specular bright spots on the overall image brightness calcula-

tion.

GainAutoRate – Uint32 – R/W

The rate at which the auto gain function changes. A percentage of the maximum

rate.

GainAutoTarget – Uint32 – R/W

The general lightness or darkness of the auto gain feature. A percentage of max-

imum GainValue.

Range: [0 – 50] Default: 5 Units: percent

Range: [0 – Camera dependent] Units: [1, 0.1 dB camera dependent]

Range: [0 – Camera dependent] Default: 0 Units: [1, 0.1 dB camera dependent]

Range: [1 – 1000] Default: 0 Units: 0.01%, i.e., 1000 = 10%

Range: [1 – 100] Default: 100 Units: percent

Range: [0 – 100] Default: 50 Units: percent