Deiters wrote: > I am pleased to see that someone is still interested in the > FS2710S! > > I have the overexposure problem, too. It is not always evident, > however. I guess that 99% of my slides are scanned well, but > clouds and a blue sky, or a bride in white dress are problematic, > indeed. > > The FS2710S does a self-calibration after power up, but that is > not the cause of the problem. > > I had a look at the SCSI traffic and found out that the Canon > software transmits gamma tables before each scan. Unfortunately > I was not able to intercept the contents of those gamma tables. > There seem to be 4096 two-byte entries for each color channel, > low byte first. But so far I have not been able to store a gamma > curve myself. As also the contrast and brightness controls have > no effect, I suspected that the FS2710 has no software control of > its digitizer, and that all color corrections must be done by > software (this is done by the recent backend). > > However, the Canon (Windows-based) software does not have the > "overexposure" problem, and this proves that my assumption is > not quite correct: The FS2710 does have some software control, > but I do not know how to activate it. I would be grateful for > good advice!
I've had a similar experience with my Epson Perfection 1260 Photo scanner. A slide scanned in XP looks great. Scanned in Linux, it's very dark.
