strange thumbnails

[Alex Linkenbach]

Salut, Giles
Files are scanned from negatives by vuescan directly into raw dng, but the thumbnails in dk are produced by dk, I assume. Different viewers give me different thumbnails, although not all produce useful results.
Ciao
Alex

Enviado desde mi iPhone

> El 16 jun 2017, a las 9:44, Gilles Caulier <caulier.gilles at gmail.com> escribió:
> 
> Hi,
> 
> How do you generate your DNG file from your scan workflow ? Not with
> digiKam, i'm sure...
> 
> Gilles Caulier
> 
> 2017-05-27 19:04 GMT+02:00 Alexander Linkenbach <Alex.Linkenbach at gmx.net>:
>> Hi
>> 
>> when I scan my black and white pics and save them in 8 or 16bit dng format I
>> get distorted thumbnails in digikam, like three mini versions in a row in the
>> upper third of the thumbnail and "random" black and white data in the lower
>> two thirds. This does not happen if I save them as 24, 48 or 64 bit. Now I
>> could save all my b/w pics in 24bit, but
>> that means 110MB instead of 32 per MF picture.
>> If I look at the scans with a different viewer (gwenview) the behavior is
>> opposite, ie only the 8 and 16bit saves give me proper thumbnails. In dolphin
>> it depends on the thumbnail size: I get correct thumbnails for all scans at
>> 80pix but the same as with gwenview for bigger thumbnails.
>> And: the file info in digikam for all scans actually shows 16bit, no matter how
>> I saved them.
>> Am I doing something wrong here?
>> 
>> Alex