[sane-devel] dark line in scan

[Bill Jehle]

On Tue, Jul 12, 2005 at 11:27:15PM -0700, Bill Jehle wrote:
> On Tue, Jul 12, 2005 at 11:50:41PM -0400, Anderson Lizardo wrote:
> >
> > Bill Jehle wrote:
> > > On Sat, Jul 09, 2005 at 04:02:32PM -0700, Bill Jehle wrote:
> > > 
> > >>I have an HP 6200C scsi when it runs it leaves a brown skidmark down
> > >>the left side of the image (see attached brown-line.png). I thought it was a bad lamp but it runs OK
> > >>with the HP app on Win2k.
> > 
> > Hi, I'm the maintainer of the geniusvp2 backend.
> > 
> > Hm... I have this very same problem with my backend. I thought at first
> > I've damaged the sensors while cleaning the mirror on the carriage,
> > because I was almost sure I've never seem that dark line before that...
> > 
> > The interesting here is that we have totally different scanners (mine is
> > a Genius ColorPage-Vivid Pro II) and backends, but the same problem. The
> > difference is that on my case the "dark line" is black (not brown). And
> > in my case, scanning on Windows also shows that line, although it's
> > almost invisible probably because of gamma correction which my backend
> > does not support yet.
> > 
> > My guess would be badly calibrated ADC...
> > 
> > - --
> > Anderson Lizardo
> 
> thanks Anderson, I was hoping it was a software problem but alas
>  after 5 years I guess it will need to be put out to pasture. 
> 
> -- 
> http://billjehle.com 

I forgot to mention, mine does show up too in the windows scan but
faintly. It was intermittent for a while but now is permanent. I
thought it coincided with a backend upgrade but apparently that's not
the case.