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

Michael Rose bugfixer at hotmail.co.uk
Mon Aug 31 21:25:53 BST 2020

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.


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

You will need a simplistic scanner that just streams data of an
indeterminate length until the host stops asking for data.


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"
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