primax: Thread: Loading and saving calibration data

Hello again

> > -L -S options which L)oads and S)aves calibration data which makes
> > scanning much more faster (on my MM100 scanner at least)
>
> I already got some calibibration saving patch, but as fas as I can see
> it has no command line enhanchements. is calibration data saving
> _really_ wanted by the folks?
>
> Pleas tell us on this list. I'd don't really like this feature.

Please let me explain my motivation to do this. 
On my scanner, calibration takes about 20 seconds. When I'm doing a preview 
in small resolution, this time is significant comparing to page scanning time 
(40% (!) almost half time (!)). In case of a preview, very good quality 
caused by accurate pre-calibration is often unnecessary - often you only want 
to know, where you placed something to scan.
Moreover, when I scan in B&W exact calibration is also not very important.
And the third: calibration data loaded from file don't differ too much from 
calibration taken just before scanning. (If lamp is warmed enough). (On my 
scanner at least ;-))
And the fourth: you've said, that you had got already a patch doing something 
like that. It means that there exists other man who had needed it :-)

In my patch you don't have to load calibration data from file if you don't 
want. If you don't use -L filename option the program acts like original one 
- without patch.


best regards,
Michal Kostrzewa

Maybe, should be better if instead of add two options (-L and -S) do the 
following:


Preview setting options: a load followed by a save (file)
after that we can use a preview option, that will use the "preview file" 
to make a quick scan
with preview purpouse.

Well, just a idea...

Cheers,
Ricardo.

Michal Kostrzewa wrote:

>Hello again
>
>>>-L -S options which L)oads and S)aves calibration data which makes
>>>scanning much more faster (on my MM100 scanner at least)
>>>
>>I already got some calibibration saving patch, but as fas as I can see
>>it has no command line enhanchements. is calibration data saving
>>_really_ wanted by the folks?
>>
>>Pleas tell us on this list. I'd don't really like this feature.
>>
>
>Please let me explain my motivation to do this. 
>On my scanner, calibration takes about 20 seconds. When I'm doing a preview 
>in small resolution, this time is significant comparing to page scanning time 
>(40% (!) almost half time (!)). In case of a preview, very good quality 
>caused by accurate pre-calibration is often unnecessary - often you only want 
>to know, where you placed something to scan.
>Moreover, when I scan in B&W exact calibration is also not very important.
>And the third: calibration data loaded from file don't differ too much from 
>calibration taken just before scanning. (If lamp is warmed enough). (On my 
>scanner at least ;-))
>And the fourth: you've said, that you had got already a patch doing something 
>like that. It means that there exists other man who had needed it :-)
>
>In my patch you don't have to load calibration data from file if you don't 
>want. If you don't use -L filename option the program acts like original one 
>- without patch.
>
>
>best regards,
>Michal Kostrzewa
>
>
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Pesquisador
Laboratório de Modelagem de Processos Marinhos e Atmosféricos
Departamento de Meteorologia
Intituto de Geociências
Centro de Ciências Matemáticas e da Natureza
Universidade Federal do Rio de Janeiro