[sane-devel] Scanner Daemon ??

[khk@khk.net]

I don't have control over the lamp, this is all handled by the
scanner internally. I think I'm doing a reset again when the
backend shuts down again, it's possible that this turns the
lamp off as a side effect. The lamp should go off automatically
after a certain time.

> Hi,
>
> On Thu, Oct 31, 2002 at 10:43:08AM +0000, Nick Lindsell wrote:
>> 	I'm building a kiosk-based system that takes a scan, adds some text
>> converts to postscript and then prints. The frontend calls scanadf to
>> do the scan - problem is it runs too slow (about 1 minute per scan).
>>
>> 	I've found that the delay is caused by scanadf waiting for the
>> scanner lamp
>> to warm up every time it starts and when scanadf exits the scanner
>> lamp  goes off.
>> Applications like Xsane keep the lamp lit while the app is open so
>> subsequent
>> scans are immediate but I need command-line.
>
> Maybe it's easier to change the epson backend to not shut off the lamp
> in sane_close. E.g. by adding an option "keep-lamp-on" or similar. I've
> done that in the gt68xx backend. If the lamp warm-up is done
> automatically, that means, if the change of brightness is meassured, you
> should be done. Otherwise you must disable the fixed warm-up time, too
> (if this is possible).
>
> Bye,
>   Henning
> _______________________________________________
> Sane-devel mailing list
> Sane-devel@www.mostang.com
> http://www.mostang.com/mailman/listinfo/sane-devel