[sane-devel] Epson Perfection 1260 with the epkowa backend (iscan 1.5.2)

[Karl Heinz Kremer]

There are two types of EPSON scanners: The ones that use the ESC-I 
command language, which are
supported by the EPSON backend, and the ones that use other command 
sets (e.g. Perfection 660,
1250 and 1260). The ESC-I scanners are doing the calibration step 
automatically when they are
powered on, so it's not necessary to do anything special in the backend 
to get correct colors and
uniform colors. I don't know how this is done with the Perfection 1260 
that is discussed in this
thread.

Karl Heinz


On Tuesday, August 5, 2003, at 02:56 PM, Henning Meier-Geinitz wrote:

> Hi,
>
> On Tue, Aug 05, 2003 at 09:13:44PM +0300, Timo Pylvänäinen wrote:
>> I'm pretty sure the problem is in iscan or the epkowa backend. 
>> Anyhow, the
>> TPU works with xsane+plustek, albeit produces crappy scans. This is 
>> pretty
>> much what I can get from negatives:
>>          http://www.cs.tut.fi/~pylvanat/helvetin16.jpg
>
> That's a comment for the backend authors:
>
> That image looks like there is no fine (per CCD pixel) calibration
> done, or the calibration isn't done correctly. I don't know how it
> works with the Epson scanners, but with the scanners I know there is a
> special calibration area for the transparency unit. So maybe the
> calibration uses the normal calibration strip in transparency mode,
> too? Or the backend doesn't know the correct position of the
> calibration area?
>
> Bye,
>   Henning
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