On Monday 24 November 2008 16:07:21 GWater wrote:
> Where do you want to add this feature?
>
> If I understand correctly this function has to be called every few seconds.
>
> Anyway - I am actually in favour of such an "call constantly" slot
> somewhere since I'd like to add support for the button on my cam.

Actually, it should be called for each frame, here's algo:

check that average luminance (Y_AVE) fits into stable region
if not, adjust exposure to get Y_AVE into stable region.

> And as long as it is only for ov9650 sensors the performance problem
> doesn't concern me much.

I'm still not sure that autoexposure works for OV7660 and OV7670 :)

And there's no performance problem at all, 15-30 comparisons per second is 
nothing for todays CPUs :)

> GWater

Regards
Vasily

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