[sane-devel] UsbSnoop for Canon DR-C225

[m. allan noah]

Hmm, I finally had some time to look at this log, and the scanner is
sending entirely black data. This might be a calibration problem, or
it might be that the scanner does not support grayscale. Perhaps you
could try a color scan?

allan

On Mon, Apr 20, 2015 at 8:12 PM, m. allan noah <kitno455 at gmail.com> wrote:
> hmm, can you try to get a debugging log like so:
>
> SANE_DEBUG_CANON_DR=35 scanimage --resolution 100 > test.pnm 2>test.log
>
> then send me a compressed version of test.log?
>
> allan
>
> On Mon, Apr 20, 2015 at 7:45 PM, Nicolas Marchildon
> <nicolas at marchildon.net> wrote:
>> Duplex & resolution appear to be interpreted, since the number of files and
>> scanning speed varies, but the ouput is always a black image.
>>
>> Tried combinations of:
>>
>> scanimage --resolution {100,600} {,--mode Color} {,--source "ADF Duplex"}
>> --batch
>>
>>
>> Le lun. 6 avr. 2015 à 21:40, m. allan noah <kitno455 at gmail.com> a écrit :
>>>
>>> I have attached a patch which will hopefully improve the situation. I
>>> have guessed at most of the parameters, and so we might have to
>>> experiment. Please apply this to a current git repo, and try some
>>> scans, simplex, duplex, color, gray, etc.
>>>
>>> allan
>>>
>>> On Wed, Apr 1, 2015 at 9:57 AM, Nicolas Marchildon
>>> <nicolas at marchildon.net> wrote:
>>> > Le mar. 31 mars 2015 à 21:56, Nicolas Marchildon
>>> > <nicolas at marchildon.net> a
>>> > écrit :
>>> >>>
>>> >>> Can you get another usb log from windows, but this time with a low
>>> >>> resolution, color duplex scan, of only the top of the paper? If the
>>> >>> front side could have RGB written in those colors, and the back side
>>> >>> could be blank or have black writing, that would help.
>>> >>
>>> >>
>>> >> I'll do that tomorrow. I have attached what I plan to scan. I assume a
>>> >> large font is going to make it easier to spot.
>>> >
>>> >
>>> > I cut the bottom of the sheet off in an attempt to reduce file size, but
>>> > it's slightly bigger. I can't go lower than 150 dpi.
>>> >
>>> > https://drive.google.com/file/d/0B1s3C34oDHi5UkowLTVaZDZsSVk/view
>>>
>>>
>>>
>>> --
>>> "well, I stand up next to a mountain- and I chop it down with the edge
>>> of my hand"
>
>
>
> --
> "well, I stand up next to a mountain- and I chop it down with the edge
> of my hand"



-- 
"well, I stand up next to a mountain- and I chop it down with the edge
of my hand"