[sane-devel] epson 2400 neg scans

epl@unimelb.edu.au epl@unimelb.edu.au
Tue, 15 Jun 2004 00:59:43 +1000 (EST)

On Sun, 13 Jun 2004 insane@piments.com wrote:

> You say that this only happens on high res but later that higher res is
> not availible on transparency. Could you be more specific? I sounds a bit
> contradictory.
High res *is* available under transparency (up to 1600dpi), just not very
useful due to lines appearing.

> What res. works correctly (no lines) and what is the max you can scan a
> neg. even if the output is poor?
Okay, I did more experiments and even at 200dpi, I can see lines. The
weird thing is, these lines remain even if I simply scan an opaque piece
of paper (while in transparency mode). Maybe the backend is buggy. Maybe
there's some calibration that the scanner or scanner's firmware that
weirds sane out. I haven't tried it under Windows either, so...

Note that transparency mode does more than switching on the fluorescent
light on the transparency cover. For example, in transparency mode, it
isn't possible to scan an A4 page as you're limited to an (approx) A6
area. Whether this is a scanner or sane limitation I don't know.

I'll see whether I can upload an sample image with lines onto a webpage in
the coming days.


BTW Not related to the scanner or scanner backend itself, but I've been
told off-list that due to a lack of accurate colour calibration under
Linux, 35mm negative scanning doesn't work anyhow -- regardless of the
scanner used.

I'm *really* hoping someone will respond telling me how utterly wrong I am
and that Free as in speech software is just an apt-get away and that it
works flawlessly with my scanner...