[sane-devel] devices and backends

[John Doe]

Yes I have made this with a list of scanner´s which get used by blind 
people!! It the rpson perfektion serias and CANON N650U and the new 
edition!!
i have implement the libusb to get the devices!! We wouldn´t use in 
this time scsi!!

Thanks
Raphael

Am Montag, 09.12.02, um 19:15 Uhr (Europe/Berlin) schrieb Henning 
Meier-Geinitz:

> Hi,
>
> On Mon, Dec 09, 2002 at 06:37:18PM +0100, John Doe wrote:
>> is it right, I have von 100 percent security that in every situation
>> the -d command in scanimage runs!?
>
> I don't know what you mean by "every situation".
>
> The -d command is an option of scanimage, so it's always present. If
> you use it, the argument is used as the name parameter of the
> sane_open() call. See the standard for what it means.
>
> Most backends use device names for that parameter, but that's not
> guaranteed.
>
> If you want to use scanimage, use scanimage -L to get a list of
> devices and select one from the list.
>
> I gues you biggest problem will not be the -d option, but to make sure
> that the scanner is detected by the USB or SCSI system.
>
>> My program is for blind person like an windows reading system only on
>> the better OS!! hehehe!
>
> There are some windows/unix gateways for SANE, see the website. Maybe
> that won't work for the blind, however.
>
>> My biggest problem are the scanner and the speech!! I develop this
>> system on PPC!! and their are not many TTS!!
>> The scanner is, that I must automatic every point, like write into the
>> conf files and so on!!
>
> Just provide a list of scanners that are supported and make sure that
> the backends do autodetection. E.g. don't support most parport
> scanners if you don't want to do manual fiddling with the config files.
>
>> I have hope that this point is realized with scanimage!!
>
> Scanimage has nothing to do with it. It's the backend's choice how to
> implement the SANE_Device name. E.g. it can be a port address (0x378)
> or a number (1).
>
>> We make an system inclusive the OS Linux or BSD!! So that the blind
>> person only must put the CD in the drive!!
>
> Good luck!
>
> Bye,
>   Henning
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