[sane-devel] requesting help with setup of Kodak 5100 AiO scanner
p.newalls at ntlworld.com
Sun Sep 7 14:19:18 UTC 2014
On 07/09/14 09:02, Paul Newall wrote:
> On 07/09/14 01:04, Rob Locher wrote:
>> I posted to the list because I was having trouble scanning a
>> black-and-white document with my Kodak 5100 AiO, and on Wed, 03 Sep
>> 2014 10:34:58 -0700, NEWALL Paul <p.newalls at ntlworld.com> wrote back
>> (I trimmed a bit to save space):
>>> The kodak ESP AiO printers basically only scan in colour, and the gray
>>> option is generated in software from the colour scan. It is possible
>>> there is something wrong with the conversion to gray that needs to
>>> be fixed.
>>> We could generate a lineart option in a similar way.
>>> First, can you do a scan of your document using the colour option with
>>> default settings? just to check that the white paper comes out
>>> approximately white and the black ink approximately black. If not
>>> there may
>>> be something else that needs fixing to make the ESP5100 work before
>>> we can
>>> do the conversion to lineart.
>> Hi Paul, and thank you for your reply. If you're one of those
>> wonderful people who make useful software available to everyone for
>> free, then thank you especially for that!
>> I did as you asked, and scanned the same document in color using the
>> default settings. The results are somewhat psychedelic:
>> The black comes out fairly black, but white isn't white unless it's
>> near something black. No wonder I wasn't able to get a reasonable
>> scan despite all my tweaking, if color settings were the problem but
>> were unavailable to me in "gray" mode.
>> - Rob
> Thanks for the colour scan. It seems that I have the same problem,
> though much less strongly. I get a slight yellow speckle in the white
> It's caused by a mistake in the colour correction curves, I was
> sending 255 points for each colour instead of 256.
> I expect to have fixed that in a few days.
The git version of sane now has this problem fixed. (kodakaio version 2.5.1)
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