Ralf Haueisen schrieb:
>>
>> Can you send a small image?
>>
>
> The image shows the cover of a book...
>
This looks like the shading correction(corrects for the properties of
each ccd cell) is making the image worse. please disable it by changing
gl841_init_optical_regs_scan to only disable it:
/* if (flags & OPTICAL_FLAG_DISABLE_SHADING)*/
r->value &= ~REG01_DVDSET;
/* else
r->value |= REG01_DVDSET;*/
The resulting image may give better information. Another possibility is
to look at the generated black_white_shading.pnm when
SANE_DEBUG_GENESYS=255 is set in the environment.
