[libcamera-devel] AE -- what is the goal was Re: Software gathering of image statistics for libcamera on Librem 5

[Pavel Machek]

Hi!

> > There are a number of common techniques and features of such
> > algorithms. though many vendors do their own thing and may even have
> > "secret sauce" so I wouldn't go so far as to say there's any
> > consensus. Increasingly sophisticated image analysis techniques like
> > face detectors and machine learning are involved, and there is the
> > whole question as to how to meter best for HDR too.
> > 
> > Raspberry Pi's implementation, for example, I would describe as
> > straightforward and not worrying about any of these complications.
> > It's documented here:
> > https://datasheets.raspberrypi.com/camera/raspberry-pi-camera-guide.pdf
> > (section 5.8). If you want something really simple you can do worse
> > than use a trivial centre-weighted scheme.
> 
> So according to the docs rpi uses steps (first adjust exposure, then
> gain, then exposure, then gain...) and does other clever stuff. Can
> you point me when the actual code is? I probably should take a look
> before reimplementing it...

Aha, got it, seems to be in rc/ipa/libipa/raspberrypi/controller/rpi.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.
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