Fwd: Re: cheese-list Digest, Vol 104, Issue 2

[John Nash <John Nash uottawa ca>]

There is also an issue of Linux drivers. I've not found one for a (somewhat dated)
Plustek 7200, which does indeed seem to scan mechanically. One of the few reasons I keep a machine
with Windows 7 around.

JN


On 2017-10-06 08:00 AM, cheese-list-request gnome org wrote:
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> Today's Topics:
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>    1. Re: Slide Scanners (Bastien Nocera)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 05 Oct 2017 17:12:22 +0200
> From: Bastien Nocera <hadess hadess net>
> To: ChrisOfBristol <chrisofbristol gmail com>, cheese-list gnome org
> Subject: Re: Slide Scanners
> Message-ID: <1507216342 23708 44 camel hadess net>
> Content-Type: text/plain; charset="UTF-8"
>
> Hey,
>
> On Mon, 2017-10-02 at 21:26 +0100, ChrisOfBristol wrote:
> > There doesn't seem to be any Linux provision for slide scanners. There
> > is also some confusion because they are not really scanners - they don't
> > scan, so using normal scanning software won't work. In fact they take a
> > photo, which means that Cheese would be a good application to use for them.
>
> You're confusing the method of access ("it shows up as a webcam") and
> which application you should be using to use it.
>
> I would expect Simple Scan to implement this, not Cheese, as you would
> probably want similar photo manipulation functionality for flat-bed
> scanners with negative and slide inserts.
>
> > Cheese does work with my Maginon FS500, but it only offers a much lower
> > resolution than my slide scanner is capable of. It would be a very
> > useful expansion of the use of Cheese if this could be fixed.
>
> Probably because the view you get in Cheese is the preview. There's an
> extension to the USB Video Camera specification which allows taking
> pictures, which neither Cheese nor GStreamer, or the kernel currently
> support.
>
> A version of this was implemented here, for a pretty old kernel:
> https://github.com/yangh/uvcvideo
>
> I would expect the functionality to go something like:
> - Implement Still Image support in the kernel
> - Add support for it in GStreamer
> - Mark Still Image devices as being either a scanner or a webcam
> - Add support for Simple Scan and Cheese to use still image capture (so
> it works out of the box in Simple Scan for slide scanners like yours,
> and Cheese can capture higher quality stills)
>
> Cheers