Instruction manual

Guppy Technical ManualV7.4.0

Description of the data path

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 compo-

nent 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 samples

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 pre-

viously 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 100: Feature control register on page 222.

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.