[sane-devel] requesting help with setup of Kodak 5100 AiO scanner

[Paul Newall]

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 
>>> that
>>> 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:
>> http://www.idiompress.com/misc/kodak-5100-aio-color-scan.png
>>
>> 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.
>>
>> Regards,
>> - 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 
> areas.
> 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.
>
> Paul
>
The git version of sane now has this problem fixed. (kodakaio version 2.5.1)
Paul