[sane-devel] Color not consistent or correct

[Jaeger, Gerhard]

Hi,

there's indeed a problem with the colors on the 1250 with the Plustek 
backend ;-( - we're working on that...

Gerhard

On Sonntag, 2. März 2003 04:26, ionmich@indiainfo.com wrote:
> Hello Henning,
>
> In your previous message you said:-
>
> >Scanner - Epson Perfection 1250. Do you use the plustek or
> >Epson Kowa backend?
>
> I am using the plustek backend.
>
> >What's the difference between you xsane and xscanimage installations?
> >Did you install one of them from source and the other from RPM?
>
> If xscanimage is part of sane-frontends-1.0.10.tar.gz then they
> were both installed from source.
>
> >Check the "/usr/local/lib" is in /etc/ld.so.conf.
>
> It was not. The reference was to "/usr/lib". I changed it to
> "/usr/local/lib". I invoked xscanimage. I got the same error
> message...xscanimage: error while loading shared libraries:
> libsane.so.1: cannot open shared object file: No such file or
> directory.
>
> >What happens if you don't use XSane's automatic film setting
> >but set up the colors manually? I.e. use the invert button and
> >change the gamma/brightness for the colors so the image looks
> >correctly? I'm trying to find out if it's a xsane or backend
> >problem.
>
> I'm not sure I understood your instruction, but here is what I
> did. I set it to negative (document source), Fuji negative
> (source medium type) and prescanned. The prescan came out
> pretty close to real life. I then manually adjusted the gamma
> etc. to make the preview look as close as possible to real
> life. When I final scanned I got a very different scan from the
> preview (saturated, extreme reds etc.) but subsequent scans
> were identical. This is a change.
>
> I then set it to transparency, full color range, reverse and
> prescanned. The resulting pre-scan was too washed out to be
> adjustable. This makes sense as transparencies are always
> darker than  negatives.
>
> I know nothing about scanning software but I find it significant
> that if I prescan several times without touching any other
> buttons etc. I get scans of different colors different contrast
> etc.
>
> >> Would a screen shot of the scan results be of any help?
> >
> >Put it on a web page and send a link to sane-devel.
>
> Sorry, I don't have a parking spot for the images.
>
> Does any of this help?
>
> Ion