Hi,
Regarding the colors of the iX500, they are not strictly raw data. The
scanner self-calibrates, which removes most of the high frequency
noise. But, the default brightness and contrast values may still need
some manual tweaking. It is also possible that the windows software
does some further enhancement, which is not done in the sane backend.
Thanks allan!
The calibration is really noticable, especially if there's any dust on the
glass. There's always been a slightly lighter stripe on the back sensor
that won't seem to go away and it's easy to see the bits of the paper that
are held slightly closer to the head by the rollers.
Fixing the gamma gets rid of most of it and tweaking the white point gets
rid of the rest. ...but it seems to be almost a bit's worth of data in each
channel.
I've never used the Windows software; I just took the PNM files, converted
them to PNG, verified they looked exactly the same as the PNMs in Gimp on
Linux and then transfered the PNGs to Windows where I looked at them with
the built-in viewer.
I guess the Windows viewer does its own gamma correction or something? Or
perhaps it's the other way around?
Best wishes,
@ndy
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