Hi Oliver, I'm replying to the below 2006 message, to confirm that the factor of two problem is present in the latest version. Here's a link to it in the archive: http://lists.alioth.debian.org/pipermail/sane-devel/2006-January/015908.html
I had a look at the source code and found the calibration code for 5150 and 5250, but I don't understand it. It would be great to be able to use my 5250C scanner with linux - google also turned up a few other users with the same problem, on ubuntu and other forums. many thanks! Brendan >[sane-devel] Benq 5150C / 5250C users: please test >Oliver Schwartz Oliver.Schwartz at gmx.de >Mon Jan 9 23:24:13 UTC 2006 > >Hi, > >> Ok, I did some testing with my BenQ 5150C. >> >> My first try was in 300dpi color mode (because this was default). >> There are no color stripes anymore. However, the scanned area was >> not very wide. Although the full available range >> ((0,0)x(216.0,297.0)mm^2) was selected in xscanimage. The resulting >> image had only 109 mm in width and approx. 145 mm in height >> (measured with millimetre graph paper) >> >> This is independent of selected resolution and colour mode. > >Looks like the measurements are off by a factor of 2. That should be >easy to fix.