ALLIED Vision Technologies Guppy F-503 User Manual
Page 121
Description of the data path
GUPPY Technical Manual V7.1.0
121
AUTOFNC_AOI affects the auto shutter, auto gain and auto white balance fea-
tures and is independent of the Format7 AOI settings. If this feature is
switched off, the work area position and size represent the current active
image size.
The camera automatically adjusts the settings to the permitted values.
Due to the fact that the active image size might not be divisible by 4 without
a remainder, the autofunction AOI work-area size might be greater.
This allows for the positioning of the work area to be at the bottom of the
active image.
Another case is for outdoor applications: the sky will be excluded from the
generation of the reference levels when the autofunction AOI is placed at the
bottom of the image.
Within this area, the R-G-B component values of the samples are added and
used as actual values for the feedback.
Note
The following ancillary conditions should be observed for suc-
cessful white balance:
•
There are no stringent or special requirements on the
image content, it requires only the presence of equally
weighted RGB pixels in the image.
•
Auto white balance can be started both during active
image capture and when the camera is in idle state.
Note
Configuration
To set position and size of the control area
(Auto_Function_AOI) in an advanced register: see
Advanced register: Autofunction AOI
Note
If the adjustment fails and the work area size and/or position
becomes invalid, this feature is automatically switched off –
make sure to read back the ON_OFF flag if this feature
doesn’t work as expected.