[sane-devel] Canon Canoscan 9000F customise document length

[m. allan noah]

Download the source code, and start reading.

On Mon, Aug 31, 2020 at 4:25 PM Michael Rose <bugfixer at hotmail.co.uk> wrote:
>
> HI Allan,
>
> Thanks for your input. For my purposes I probably won't need to scan beyond 40 inches.  I use the scanimage frontend on the command line. Where can I find information on how to modify the SANE backend for this model?  If the value for document length is somehow sent to the scanner before the scan then I would like to be able to put in my own values for this. I think this way I could discover what the firmware limit is. Do you know where can I find information on how to modify the Canoscan 9000F backend driver or any information related to modifying/enhancing SANE scanner drivers? Thanks.
>
> Mike
>
> ________________________________
> From: m. allan noah <kitno455 at gmail.com>
> Sent: 31 August 2020 20:03
> To: Michael Rose <bugfixer at hotmail.co.uk>
> Cc: sane-devel at alioth-lists.debian.net <sane-devel at alioth-lists.debian.net>
> Subject: Re: [sane-devel] Canon Canoscan 9000F customise document length
>
> There is no reason to think that any particular scanner will support
> that capability. Many of them get information about the total length
> of the scan before they start, and there is a firmware limit to that
> value.
>
> You will need a simplistic scanner that just streams data of an
> indeterminate length until the host stops asking for data.
>
> allan
>
> On Mon, Aug 31, 2020 at 3:05 PM Michael Rose <bugfixer at hotmail.co.uk> wrote:
> >
> > Hello everyone,
> >
> > I'm new here so please forgive me if I'm not doing things right. I was hoping someone could help me. I am trying to modify a Canonscan 9000F scanner so that I can scan A4 width documents of any length beyond 11.7 inches. I can modify the scanner enclosure and extend or replace the glass platter. I need help with modifying the sane backend driver. Does anyone know if this is possible? How would I go about doing this? I Any suggestions would be most welcome. Thanks.
> >
> > Mike
>
>
>
> --
> "well, I stand up next to a mountain- and I chop it down with the edge
> of my hand"



-- 
"well, I stand up next to a mountain- and I chop it down with the edge
of my hand"