One-push white balance – ALLIED Vision Technologies Guppy F-503 User Manual
Page 119
Description of the data path
GUPPY Technical Manual V7.1.0
119
One-push white balance
The camera automatically generates frames, based on the current settings of
all registers (GAIN, OFFSET, SHUTTER, etc.).
For white balance, in total eight frames are processed and a grid of at least
65536 samples is equally spread over the whole image area. The R-G-B com-
ponent values of the samples are added and are used as actual values for the
one-push white balance.
This feature uses the assumption that the R-G-B component sums of the sam-
ples are equal; i.e., it assumes that the average of the sampled grid pixels is
to be monochrome.
If the image capture is active (e.g. IsoEnable set in register 614h), the
frames used by the camera for white balance are also output on the 1394 bus.
Any previously active image capture is restarted after the completion of
white balance.
Note
Interlaced GUPPYs (GUPPY F-038/038 NIR/044/044 NIR) do
not have one-push white balance.
Note
Configuration
To configure this feature in control and status register (CSR):
See
Table 106: Feature control register
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.