[libcamera-devel] ipa: rkisp1: Add autofocus algorithm

[Nicholas Roth]

For what it's worth, I lost my motivation to work on this when I realized
nothing I tried in a reasonable amount of time would be able to make the
PinePhone Pro reliably receive calls. All yours!

-Nicholas

On Wed, Jul 24, 2024, 8:28 AM Daniel Semkowicz <dse at thaumatec.com> wrote:

> Hello all,
>
> First of all, please forgive my lack of communication. The last year
> was very intense for me, and I missed some messages in the mess...
> I also had to stop the work on the AF for a longer period.
>
> I see that there have been attempts to continue my work.
> Was there any progress in the area of auto-focus on rkisp1?
>
> I was also contacted by Luis Garcia, who tried to work on the AF
> for a while. He made initial implementation of golden search instead
> of hill climb method. However, the main code base of the AF series
> is the same. He shared his work here:
>
>   https://github.com/luigi311/libcamera/tree/golden_search_focus
>
> Unfortunately, Luis cannot continue the work any time soon.
>
> I should have more time in the near future, so I can support anyone who
> is working on the AF series. If no one is working on it, I may resume
> this series.
>
> Kind regards
> Daniel
>
>
> On Mon, Aug 28, 2023 at 1:45 PM Jacopo Mondi
> <jacopo.mondi at ideasonboard.com> wrote:
> >
> > Daniel now cc-ed for real
> >
> > On Mon, Aug 28, 2023 at 09:07:12AM +0200, Jacopo Mondi via
> libcamera-devel wrote:
> > > Hi Nicholas,
> > >    sorry for not replying on irc but I was on leave
> > >
> > > On Tue, Aug 22, 2023 at 09:37:07PM -0400, Nicholas Roth via
> libcamera-devel wrote:
> > > > To whom it may concern,
> > > >
> > > > I've had my eye on this patch series for some months now, and can see
> > > > that it has not progressed since March. I am interested in
> > > > contributing. My understanding is that the reason this ISP lacks an
> > > > autofocus implementation is that the algorithm here does not work
> > > > properly because it gets stuck in local minima. Is that correct?
> > > >
> > > > Professionally, I am a research-adjacent AI practitioner and I work
> > > > with and read a lot about optimization, which seems very closely
> > > > related to autofocus. I have also done computer vision work in the
> > > > past. This is why I think that I might have something to add here.
> > > >
> > > > If this sounds good to the maintainers, and the original author
> > > > doesn't object, I would like to proceed with this understanding,
> > > > though I can't guarantee a fast rate of progress. Please also let me
> > > > know if I am missing any other context about the patch series that
> > > > would likely be helpful.
> > >
> > > I've now cc-ed Daniel (the original author).
> > >
> > > I admit I have not followed after Laurent's review of v6, maybe Daniel
> > > can give more details about the current status.
> > >
> > > Thanks
> > >   j
> > >
> > > >
> > > > Thanks,
> > > > -Nicholas
>
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