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

[Jacopo Mondi]

On Wed, Jul 24, 2024 at 09:52:42AM GMT, Nicholas Roth wrote:
> 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!

Sorry to hear that, at least it was not because of the camera ;)

>
> -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
> >