Re: Remote control focus by moving camera (Dr. N. Busscher)
Ray via Gphoto-devel <[email protected]>
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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, [email protected] <[email protected]> wrote:
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1. Re: Remote control focus by moving camera (Dr. N. Busscher)
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Message: 1
Date: Tue, 13 Jul 2021 16:35:32 +0200
From: "Dr. N. Busscher" <[email protected]>
To: Marcus Meissner <[email protected]>, C V Horie
<[email protected]>
Cc: "[email protected]"
<[email protected]>
Subject: Re: [gphoto-devel] Remote control focus by moving camera
Message-ID: <[email protected]>
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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
>
>
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