ALLIED Vision Technologies Stingray F-504 - Manual (Page 124)

Description of the data path
STINGRAY Technical Manual V4.4.4
122
The algorithm is based on the assumption that the R-G-B component sums of
the samples are equal, i.e., it assumes that the mean of the sampled grid pix-
els is to be monochrome.
Auto shutter
In combination with auto white balance, Stingray cameras are equipped with
auto shutter feature.
When enabled, the auto shutter adjusts the shutter within the default shutter
limits or within those set in advanced register F1000360h in order to reach
the reference brightness set in auto exposure register.
The applied algorithm uses a proportional plus integral controller (PI control-
ler) to achieve minimum delay with zero overshot.
Figure 56: AUTOFNC_AOI positioning
Note

Target grey level parameter in SmartView corresponds to
Auto_exposure register 0xF0F00804 (IIDC).
Increasing the auto exposure value increases the average
brightness in the image and vice versa.
AF
_AREA_
SIZE
: Heigh
t: n x
4
AO
I: Y-
siz
e
AOI: X-size
AF_AREA_SIZE: Width: n x 4
0,0
AF_AREA_POSITION: Left,Top
Sampling grid for Auto-Function