[Elphel-support] Adjusting/Triggerin White Balance

[Michael Aschauer]

How is it possible to manually trigger and tune white balance?

Trying the example from
http://elphel.cvs.sourceforge.net/elphel/elphel353-7.1/packages/web/353/php_top/whitebalance.php?view=markup

gives me:

<snip>
Fatal error: Call to undefined function elphel_white_balance() in 
/mnt/flash/html/whitebalance.php on line 66
</snip>

Is the white_balance function gone in 8.0 firmware?
http://wiki.elphel.com/index.php?title=PHP_in_Elphel_cameras#elphel_white_balance

best,
m,-


Am 2010-06-02 07:42, schrieb Andrey Filippov:
>             Hi Andrey
>                  We made a CCD(Sony ICX274AL) interface board to replace
>             the CMOS board(10338 board),CCD board used an FPGA to
>             simulate CMOS control interface,can be controlled by 353 board.
>
>
> Hi Melady,
>
> Interesting project! We are often asked about availability of the CCD
> front end for the Elphel model 353 camera.
>
>                  Development process have encountered some problems
>             related to automatic white balance,partial green image when
>             the camera Backlight.
>                  Can you give us some of the auto white balance work
>             flow chart or algorithm document？
>
>
> White balance algorithm that we use relies on some white objects in the
> selected area. And "white object" assumes that the brightest part of the
> image is white and it is true in most (not all) of the cases. Such
> algorithm can not work when some areas are over exposed (as on your
> example), I would recommend adjust parameters of the autoexposure so it
> will not try to balance colors if there is a lot of overexposure.
>
> Andrey
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com