Allied International V2.4.0 Manual Do Utilizador
Description of the data path
OSCAR Technical Manual V2.4.0
61
One-push automatic white balance
The camera automatically generates frames, based on the current settings of
all registers (GAIN, OFFSET, SHUTTER, etc.).
all registers (GAIN, OFFSET, SHUTTER, etc.).
For white balance, in total 9 frames are processed, and a grid of at least 300
samples is equally spread over the work area. This area can be the field of
view or a subset of it. The R-G-B component values of the samples are added
and used as current values for both the one-push and the automatic white
balance.
samples is equally spread over the work area. This area can be the field of
view or a subset of it. The R-G-B component values of the samples are added
and used as current values for both the one-push and the automatic 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.
ples are equal; i.e., it assumes that the average of the sampled grid pixels is
to be monochrome.
Figure 27: U/V slider range
Note
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Configuration
To configure this feature in control and status register (CSR):
See Chapter
See Chapter
To activate one-push automatic white balance: Set one-push
bit in the WHITE_BALANCE register.
bit in the WHITE_BALANCE register.
Note
L
The following ancillary conditions should be observed for suc-
cessful white balance:
cessful white balance:
•
There are no stringent or special requirements on the
image content, it requires only the presence of mono-
chrome pixels in the image.
image content, it requires only the presence of mono-
chrome pixels in the image.
•
Automatic white balance can be started both during
active image capture and when the camera is in idle
state.
active image capture and when the camera is in idle
state.