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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.).
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.
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.
Figure 27: U/V slider range
Note
L
Configuration
To configure this feature in control and status register (CSR):
See Chapter White balance register on page 60.
To activate one-push automatic white balance: Set one-push
bit in the WHITE_BALANCE register.
Note
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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 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.