Hi Marcus! It's been too long! As soon as I read the problem an idea popped into my head that I thought to share with Dr. Busscher. I think what might work here is something from Astrophotography. You might try a motorized rack and pinion focuser and controller (There is some arduino code that emulates a Moonlite focuser) and software or code from "auto focus" like Jasem Mutlaq's Ekos has over at Indilib.org.
Hope this helps, Ray Wells IV https://github.com/Blueshawk On Wednesday, July 14, 2021, 12:35:34 PM UTC, gphoto-devel-requ...@lists.sourceforge.net <gphoto-devel-requ...@lists.sourceforge.net> wrote: Send Gphoto-devel mailing list submissions to gphoto-devel@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/gphoto-devel or, via email, send a message with subject or body 'help' to gphoto-devel-requ...@lists.sourceforge.net You can reach the person managing the list at gphoto-devel-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than "Re: Contents of Gphoto-devel digest..." Today's Topics: 1. Re: Remote control focus by moving camera (Dr. N. Busscher) ---------------------------------------------------------------------- Message: 1 Date: Tue, 13 Jul 2021 16:35:32 +0200 From: "Dr. N. Busscher" <bussc...@uni-kassel.de> To: Marcus Meissner <mar...@jet.franken.de>, C V Horie <c.v.ho...@hotmail.co.uk> Cc: "gphoto-devel@lists.sourceforge.net" <gphoto-devel@lists.sourceforge.net> Subject: Re: [gphoto-devel] Remote control focus by moving camera Message-ID: <82be4483-bd43-ab05-d37f-50e9171de...@uni-kassel.de> Content-Type: text/plain; charset="utf-8"; format=flowed Sometimes you can use the following approach to detect the sharpness. > https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7820/1/Print-image-sharpness-analysis-based-on-gray-level-co-occurrence/10.1117/12.866719.short?SSO=1 The texture parameters can be calculated by the pgmtexture prog of the netpbm tools. best greetings Nicolaas On 13.07.21 10:39, Marcus Meissner wrote: > Hi, > > On Mon, Jul 05, 2021 at 10:37:24AM +0000, C V Horie wrote: >> I am using Python/Arduino to control a carriage from which I am taking a >> mosaic of photos, using Olympus E-M5 ii. >> The shutter is controlled by hacking the USB cable. >> >> I should like to control the manual focus at a constant >> distance/magnification by moving the camera up and down automatically - like >> the lens AF system. >> >> Has anyone tackled this problem? > I think I have not heard of such an approach yet, sorry. > > Ciao, Marcus > > > _______________________________________________ > Gphoto-devel mailing list > Gphoto-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gphoto-devel -- # Dr. N. Busscher, University of Kassel # D-37213 Witzenhausen, Nordbahnhofstrasse 1a # tel 0049 (0) 5542 98 1712/1632, Fax: 0049 (0) 5542 98 1713 # web: http://www.uni-kassel.de/go/lebensmittel ------------------------------ ------------------------------ Subject: Digest Footer _______________________________________________ Gphoto-devel mailing list Gphoto-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gphoto-devel ------------------------------ End of Gphoto-devel Digest, Vol 182, Issue 6 ********************************************
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