[sane-devel] ScanJet 7450C, avision-2003-02-08-1127-sane-1.0.10.patch, Redhat 8.0 - inverted images

[TomF]

I installed sane-1.0.10 and avision-2003-02-08-1127-sane-1.0.10.patch on
my Redhat 8.0 system, and modified /etc/sane.d/hp.conf to contain:

scsi HP
/dev/scanner
/dev/usb/scanner0
  option connect-device

Changing /dev/scanner to link to /dev/usb/scanner0 did not work, so I
changed it back to the Redhat 8.0 default:  -> /dev/sgf

After I rebooted, scanimage worked, but produced a negative image.  

I installed xsane-0.84-8.i386.rpm, but it looked for libraries in
/usr/lib while 1.0.10 had put them in /usr/local/lib.  I put links in
/usr/lib to resolve this.

xsane worked, but also produced negative images.  I was thrashing around
trying to get sane working before I found out about the patch, and I may
have changed something and forgot to record the change.

It looks like I need a tutorial that describes how to pruduce plain
black and white images.  Where could I find one?