Hi list, quite a lot of scanner support negative scanning, having a extra TPA or TPU. As the calibration is really bad with the Plustek backend, I'd like to improve this - BUT HOW????? On what do I have to take care about? Currently I try to find the darkest and brightest values, and then I did some fine calibration, but this is not enough - any ideas? Could somebody shed some ligth on this?
TIA, Gerhard
