Hello, You can find the result of this test here :
http://ggastebois.free.fr/lide90_snoop/no_shading_2bright_2dark.tar The calibration is about 25s long. Resulting image is bad (as befor). Regards Guillaume Pierre Willenbrock a ?crit : > Pierre Willenbrock schrieb: >> Guillaume Gastebois schrieb: >>> Hello, >>> >>> You can find all of that on : >>> http://ggastebois.free.fr/lide90_snoop/no_shading.tar >>> >>> What seems strange in calibration ? >>> >> The minimum/maximum values retrieved from the scans do not scale with >> the offset values, but in a rather random manner. The calibration >> expects a linear relationship. >> >> Regards, >> Pierre >> > > Hi, > > the raw offset calibration data looks horrible. Too bright and noisy. > Please change the too bright/too dark thresholds for > gl841_offset_calibration in genesys_gl841.c like this: > > @@ -4545,9 +4546,9 @@ > val = > first_line[i * 2 * channels + 2 * j + 1] * 256 + > first_line[i * 2 * channels + 2 * j]; > - if (val < 10) > + if (val < 1000) > cmin[j]++; > - if (val > 65525) > + if (val > 40000) > cmax[j]++; > } > > Send/Put online the debug files offset*.pnm, and the > "gl841_offset_calibration: acceptable offsets: " lines from the debug > output(Or the whole set, whichever is more convenient ;-)). > > Regards, > Pierre > >
