On Sun, Sep 19, 2010 at 10:09 PM, stef <stef.dev at free.fr> wrote: > Le Wednesday 15 September 2010 15:21:06 Andrew Ziem, vous avez ?crit : > ... >> >> Hi Stef, >> >> Sorry! I had to do two things to make the shading file >> >> 1. I forgot to define DEEP_DEBUG :( >> 2. I ran the commented-out parts of your shell script. (Apparently the >> first time I was running the code that was installed with Fedora and >> not the code I compiled myself.) >> >> I am attaching a .zip with the log and all the PNMs. ?Also there is a >> PNG from Windows XP for comparison. >> >> (The large, solid white area in the Disneyworld PNG I posted on the >> mailing list is where I removed a person for privacy reasons.) >> >> >> Andrew > > ? ? ? ?Hello, > > ? ? ? ?to compute shading correction to be apllied on scans, the backend first > scan a white area before the glass. It seems that usable white lines are > lesser than other similar models. ?A short term fix is to try o shorten the > numner of lines used. In lexmark_low.c around line 4940 change > ?if (yoffset + (8 * 4) / regs[0x7a] < lines) > ? ?lines = yoffset + (8 * 4) / regs[0x7a]; > > to > ?if (yoffset + (8 * 2) / regs[0x7a] < lines) > ? ?lines = yoffset + (8 * 2) / regs[0x7a]; > > ? ? ? ?so we use only 2 lines (you could alos try with 3 lines). If it isn't > enough we'll have to change calibration to scan backward to find a better > white area.
I'm still seeing the bands with 2 and 3. Should I send the logs again? Andrew
