[sane-devel] Epson perfection 660 usb - problem with lineart
scanning - snapscan backend
fredo at starox.org
Sat Sep 9 17:52:44 UTC 2006
Le mardi 05 septembre 2006 à 20:29 +0200, Oliver Schwartz a écrit :
> > > When I try to scan in lineart mode, it makes garbage on output.
> > > The scan seems "misaligned".
> > > But if I first make a scan in gray or color mode, and then switch
> > > to lineart, it works !
> > It works ... sometimes :(
> > I acquire a scan in Lineart mode and make a log :
> > http://www.starox.org/pub/sane/snapscan/lineart.log
> > It makes dirty squares in the image :
> > http://www.starox.org/pub/sane/snapscan/lineart.pnm
> Maybe you can provide an USB trace of a lineart scan on windows.
> You need to install an USB sniffer first. I prefer USBSnoop which is
> available from http://benoit.papillault.free.fr/usbsnoop/ . The page
> also gives basic instructions on how to use it.
> To produce the log you should
> - unplug and replug the scanner
> - Start the scanning software
> - Do a preview scan
> - Do a very small scan with lowest resolution
I forgot to set the lowest resolution :(
So here is the tarball:
Or go simply here if the link above don't work:
I made 2 scans, one with a small images (scanner tool says it's 765byte)
and another one with full width.
0 Plug the scanner in
2819458 Scanner preview ended
* Click on acquire button
3790xxx Calibration stuff (it pause but I hadn't time to read the
3827264 scan of image 1 finished
* Change the surface of acqusition (no activity on usb) and click on
480xxxx Calibration stuff
5322638 scan of image 2 finished
You can ask me any other log, even if I'm busy, I'll answer !
Don't hesitate :)
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