On Friday 08 May 2015 21:46:36 Ondrej Zary wrote: > On Friday 08 May 2015 16:17:53 Ondrej Zary wrote: > > On Thursday 07 May 2015 23:32:28 Ondrej Zary wrote: > > > Hello, > > > I just got Umax Astra 4450 (same as 4400 except with UTA?) for a while > > > and tested it with SANE. Unfortunately, it does not work. The lamp > > > turns on and the head moves a bit, then goes back (two times) and the > > > scan ends with these errors: > > > > > > [rts8891] simple_scan: failed to wait for data > > > [rts8891] gain_calibration: failed scan data > > > [rts8891] sane_start: failed to do gain calibration! > > > scanimage: sane_start: Error during device I/O > > > > I've modified sane_start() in rts8891.c to not fail if gain_calibration() > > returns error. It now scans the complete area and the output resembles > > what's in the scanner (black template for UTA use with green text) but > > it's blurry, shifted horizontally (and the gain is wrong, of course): > > http://www.rainbow-software.org/linux_files/umax_astra_4450/no_gain_calib > >ra tion.ppm.gz > > http://www.rainbow-software.org/linux_files/umax_astra_4450/no_gain_calib > >ra tion.log > > > > Looks like there's a problem with the sensor type?
Gain calibration fails because dev->left_offset (and thus xstart) is negative. If I set xstart to 4, gain calibration passes (although it's wrong: ends after first pass with 0x1f,0x1f,0x1f). So find_margin() does not work... -- Ondrej Zary -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
