[sane-devel] correcting upside-down pages in duplex mode using ADF

ken gebser at mousecar.com
Fri Jan 30 16:52:11 UTC 2015

Thanks, Allan.  I talked with HP tech support about this too and the 
answer I got was, "they all do that" and, if you want that kind of 
scanning (where all the pages come out right-side-up), you have to get a 
dedicated scanner which costs twice as much (and doesn't have printing 
and faxing capabilities).

My current office space isn't large enough to accommodate a lot of such 
dedicated devices and, for other reasons, a less expensive all-in-one 
(AIO) printer like the one I bought makes sense.  I mean, for $150 I get 
a nice ADF/duplex printer, scanner, copier, and fax machine; that's a 
lot of technology in a relatively small space and for a very good price. 
  That they provide drivers for Linux is also major.

Yes, it would be much better if HP designed into this product the logic 
which would do "convert -flip" in the hardware.  It would be much faster 
if done in the hardware and probably cost them just a couple bucks more 
per machine.  But that's the economic system we have and it's not likely 
to change in the near future.  I just thought that, if "they all do that 
[backside upside-down thing]", there might be an option in xsane-- say, 
a button in the GUI to click on-- to vertically flip the backside of 
each page when scanning in duplex mode.  Maybe the option would best 
reside in xsane's configuration settings for the individual scanner. (?)

Would this list be the place to make this feature request?

On 01/30/2015 08:11 AM, m. allan noah wrote:
> I hate to sound like a broken record :) I don't think there is a
> setting to fix this in xsane, because this is a bug in the backend.
> IMHO, the individual backend is responsible for making the image make
> sense.
> In the short term, you should be able to use 'convert -rotate 180' to
> rotate those images.
> allan
> On Fri, Jan 30, 2015 at 5:38 AM, ken <gebser at mousecar.com> wrote:
>> When scanning several pages using the ADF in duplex mode, the backside of
>> each page is rendered upside-down.  Is there some setting in xsane to flip
>> the backside of each page vertically so that it's right-side-up?
>> Failing that, is there a utility to accomplish the same thing
>> programmatically after the fact?
>> Thanks for all good tips.
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