[sane-devel] permanent calibration files

[Matthew Duggan]

Hi,

>
> Just a warning. I had the same problem. But my scanner has some
problems with
> certain calibration values. I once forgot to calculate the data and
used
> undefined memory. As a result the scanner became completely unusable.
The
> only way to fix it was to run the windows driver.
> What I want to say: If the data is writable for all users you could
have a
> really big security problem - it could damage your hardware. I think
the only
> secure way then is to use saned or recalculate it every time.
>

Interesting point Andre, I'd never really considered that.  Thankfully
if the 630U is anything like the 630P then it's all emulated in software
anyway (well, there may be a way to store the values into the scanner,
but we never worked out what it was!), so at worst you'll have ugly
pictures coming out until someone recalibrates.

Cheers,

- Matthew Duggan
http://canon-fb330p.sourceforge.net/