Instruction manual

Description of the data path

8.3.1 One Push automatic white balance

is activated by setting the “One Push” bit in the WHITE_BALANCE register (see WHITE-

lly

read over the work area. This area can be the field of view or a subset of it. The R-G-B

mponent values of the samples are added and are used as actual values for both the One Push

and the automatic white balance

This feature uses the assum e samples shall be equal;

i.e., it assumes that the av l nochrome.

he following ancillary conditio b r ite balance:

 There are no stringent or special requirements

presence of monochrome pixels in the image.

e and when the

camera is in idle state.

camer

capture is restarted after the completion of white balance.

utom lso be enabled by using an external trigger. However, if there is a

capturing individual frames this process is aborted.

ustrates the automatic white balance sequence.

BALANCE). The camera automatically generates frames, based on the current settings of all

registers (GAIN, OFFSET, SHUTTER, etc.).

For white balance, in total six frames are processed and a grid of at least 300 samples is equa

ption that the R-G-B component sums of th

erage of the sampled grid pixe s is to be mo

ns should be o served fo successful wh

on the image content, it requires only the

 Automatic white balance can be started both during active image captur

If the image capture is active (e.g. “IsoEnable” set in register 614h), the frames used by the

a for white balance are also outputted on the 1394 bus. Any previously active image

atic white balance can aA

pause of >10 seconds between

The following flow diagram ill

Figure 33: Automatic white balance sequence

MARLIN Technical Manua

Page 59