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

Iris

Auto iris lens support. Supported auto-iris lens types (camera dependent):

video, DC, and P-iris. GT series detects lens type on power up. DC settings will

not apply if P-Iris lens connected. P-Iris settings will not apply if DC iris lens

connected.

The auto iris algorithm calculates IrisAutoTarget based on information of the

current image, and applies this to the next image. Large changes in scene light-

ing may require 2-3 frames for the algorithm to stabilize. Adding simultaneous

GainMode = Auto, or ExposureMode = Auto, to IrisMode = Video/DCIris/PIris-

Auto results in undefined, “race to target” behavior.

IrisAutoTarget – Uint32 – R/W

Controls the general lightness or darkness of the auto iris feature; specifically

the target mean histogram level of the image—0 being black, 100 being white.

IrisMode – Enum – R/W

Sets the auto-iris mode. Valid when ExposureMode = Manual or PieceWiseLinear-

HDR.

IrisVideoLevel – Uint32 – R

Dependant on lens type:

Note



The camera must be acquiring images in

order for the auto algorithm to update.

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

Disabled [Default] Disable auto-iris

Video Enable video auto iris. Video-type lenses only

VideoOpen Fully open the iris. Video-type lenses only

VideoClosed Full close the iris. Video-type lenses only

PIrisAuto Enable P-Iris auto mode. P-Iris lenses only.

PIrisManual Manually control iris via LensPIrisPosition attribute. P-Iris

lenses only.

DCIris Enable DC auto-iris. DC-Iris lenses only

Lens type Range Description

Video-type

lenses

[0 – 150]

Units: 10 mV

Video-type lenses have a reference voltage.

When a voltage larger than this reference

voltage is applied to the lens, the iris

closes. When a voltage is applied less than

this reference voltage, the iris opens

P-iris lenses [0-100] Attempts to match IrisAutoTarget

DC-iris lenses [0-100] Attempts to match IrisAutoTarget