[sane-devel] Degrading images: Plustek OpticPro UT16

[Johannes Meixner]

Hello,

On Sep 22 18:33 rhn wrote (excerpt):
> the scanner I am using has a peculiar problem, where scanning
> consecutive images causes the image quality to degrade:
> the left part becomes yellow in vertical streaks that increase
> in numbers; the right part becomes red. To get a completely
> yellow-red image, about 10 scans are necessary, regardless
> of options.
> The backend for this scanner is plustek.

at openSUSE we have an issue report with similar symptoms
but different backend (HP Scanjet 2400, genesys backend):

https://bugzilla.opensuse.org/show_bug.cgi?id=905034

I was unable to reproduce it or debug the root cause
so that all I did was basically blind guess, e.g. see:

https://bugzilla.opensuse.org/show_bug.cgi?id=905034#c18


Kind Regards
Johannes Meixner
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