Allied Guppy, Техническое руководство, Страница: 76 / 238

Description of the data path
GUPPY Technical Manual V4.0.1
76
Within this area, the R-G-B component values of the samples are added and
used as actual values for the feedback.
The following drawing illustrates the AUTOFNC_AOI settings in greater detail.
The algorithm is based on the assumption that the R-G-B component sums of
the samples shall be equal, i.e., it assumes that the mean of the sampled grid
pixels is to be monochrome.
Visualization of the AUTOFNC_AOI is carried out with the help of the graphics
overlay (see: block diagram) function of the camera. This area is highlighted
when the
Show work area bit is set high.
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.
Figure 36: AUTOFNC_AOI positioning
Note The algorithm will try to create an uncolored image when
looking at an area that is completely colored with automatic
white balance
ON .
AOI: Y-size
AOI: X-size
AF_AREA_SIZE: Width: n x 4
AF
_AREA_SIZ
E:
He
ight: n
x 4
0,0
AF_AREA_POSITION: Left,Top
Sampling grid for Auto-Function