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
