[sane-devel] coolscan ls 4000 ED xsane default settings

[johnny geling]

On Thursday 15 July 2004 22:52, Major A wrote:
> > Since a week I'm experimenting with a nikon coolscan LS 4000 ED. Using
> > sane, xsane xscanimage I find it realy difficult to get good scanning
> > result concerning color. I'm scanning color slides (dia). I tried
> > different settings, the automatic exposure etc. Unfortunatly without
> > good result. So I gave up.
> >
> > I have general good succes with vuescan. So it is not the scanner.
> > Therefor I'm looking for propper settings to use with the coolscan LS
> > 4000 ED. Is there someone who would like to share?
>
> The scanner requires proper colour balance and gamma settings. Colour
> balance is usually achieved by doing an AE with WB (for slide film),
> then you can adjust the exposure multiplier to fill the histogram as
> efficiently as you can. Finally, adjust gamma to suit your
> requirements. I use a gamma between 2 and 3 almost all the time, 2.4
> is normal, higher values are useful for certain films such as Kodak
> P1600.
>
> This goes for all Coolscans, BTW, I guess VueScan just does some of
> this automatically.
must be something like that. It is doing a good job. Also the automatic start 
on insert of a slide I like.
>
>   Andras

What are your exposure times?
after the AE with white balance I'v got: 
red: 1014
green: 740
blue: 480
multiplier: 1.7 (or I got over exposure and no details in high lights)
gamma: 2.4
brightness: 0
contrast: 0

rgb standard. 

Exposure time could be machine dependent.
This gives me some results I can live with. Comparing to the scans 
automaticaly made with vuescan I maybe like the sane one better. 

The pictures are quite dificult with a lot of contrast in it. 

http://members.chello.be/~sf15556/test/testvergelijkingsane-vuescan.tar.gz

Gives a quick comparesing between the 2


-- 
Johnny Geling