2008/6/28 Rene Rebe <rene at exactcode.de>: > litlle girl wrote: >>> >>> The windows driver probably calibrates once, when the scanner is >>> first used, and stores the reference data somewhere (file, registry, >>> etc.). >>> >>> The SANE driver should try to do the same (not registry of course, >>> but some /var/... whatever file-system location. >>> >>> Yours, >>> >>> -- >>> Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin >>> http://exactcode.de | http://t2-project.org | http://rene.rebe.name >>> >> >> This is very good idea! :) >> I think "calibrate.conf" is good place to put calibrate data. >> >> calibrate.conf structure: >> vendor, product, mode (Lineart,Gray,Color) calibrate data >> >> Maybe "recalibrate" option will be needed :) > > As proecssed run with normal user's ID have to be able to > write to it some Un*x a-like /var/state/sane/$backend-$model.raw > file should be more suitable. > > But as I'm not in CPU-less scanners the backend authors > will probably figure out what they like most. > > Yours, > > -- > Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin > http://exactcode.de | http://t2-project.org | http://rene.rebe.name >
I've made some research, I scan 3 times at lineart, gray and color mode and grep from log last calibrated exposure_time. Lineart 1st [gt68xx] gt68xx_generic_set_exposure_time: 0x300 0x3b3 0x40a 2nd [gt68xx] gt68xx_generic_set_exposure_time: 0x301 0x300 0x3fc 3rd [gt68xx] gt68xx_generic_set_exposure_time: 0x301 0x3b3 0x29c Gray 1st [gt68xx] gt68xx_generic_set_exposure_time: 0x300 0x2c2 0x29c 2nd [gt68xx] gt68xx_generic_set_exposure_time: 0x341 0x3d2 0x29c 3rd [gt68xx] gt68xx_generic_set_exposure_time: 0x350 0x40b 0x44c Color 1st [gt68xx] gt68xx_generic_set_exposure_time: 0x33b 0x2c8 0x29c 2nd [gt68xx] gt68xx_generic_set_exposure_time: 0x300 0x2c9 0x29c 3rd [gt68xx] gt68xx_generic_set_exposure_time: 0x300 0x2c7 0x29c It doesnt make much sense :( LLG
