Please enable debug output of the backend by setting the environment variable SANE_DEBUG_UMAX to 12, then do a preview and a real scan and the the debug output to me (not to the list).
Oliver Am Die, 2005-01-04 um 18.46 schrieb Robert Persson: > I am having trouble with the quality of scans from a Umax Astra 600S and > would > be very grateful if anybody could tell me: > (a) how to solve the problem > (b) whether I can be confident that I won't have the same problem if I buy a > new budget-priced scanner that is supposed to be supported in Sane. > > The scanner is connected to a Power Mac 8600 running Ubuntu Warty. > > The problem is that, while the previews look OK (or perhaps a little dark) > the > scans are way too bright, to the point of being washed out. The discrepancy > between the preview and the scan is so great that, in order to get a > tolerably accurate scan the preview has to be darkened until it is too black > to see. > > The problem is definitely with the backend because I can reproduce it when I > scan over the network into Photoshop running on my wife's OS X Powerbook. > > The problem does not occur when using Umax's own drivers in Mac OS 9. In > other words the colours of the preview are the same as the colours of the > scan. > > Many thanks > Robert > -- > Pigsh*t is the new bullsh*t.
