[sane-devel] Scanning Lineart/Halftone with MICROTEK Scanmak

[mh]

Oliver Rauch, Freitag, 24. Mai 2002 20:05:
> mh wrote:
> > Oliver Rauch, Freitag, 24. Mai 2002 17:27:
> > > Hello.
> > >
> > > I did some tests with xsane-0.86 (save and viewer) and the pnm backend
> > > in lineart mode some time ago and was not able to find any problems. I
> > > would be glad to help if I can reproduce the problems. What I need is
> > > an exact description under which conditions the image is sheared .
> >
> > As far as I can tell, this happens if the image data isn't 8bit aligned,
> > e.g. a with of 264 or 256 works fine while a width of 263 or 257 results
> > in a messed up image. I didn't look at the code, but I think you assume,
> > that every bit holds valid data, which isn't true for lineart images (?)
>
> I did test this with the pnm backend and lineart images with a width of 617
> - 622 which works fine. So I do not find a problem with xsane.
>
> If this really is a xsane problem please tell me how I can reproduce this
> with e.g. the pnm backend.

You are right, there are no problems with the pnm backend. Seems like I have 
to look at the backend again.

Michael