Using the Canoscan LiDE 50 scanner

I just got this scanner for some simple document scanning. It's small and light, and takes its power from the USB port (!)

Install the following:
yum install sane-backends sane-backends-libs xsane

Check the file /etc/sane.d/dll.conf to see if it has a line:
genesys
(you can remove all other lines if you like) This driver should also support the Canoscan LiDE 35, 40, and 60, the Medion MD5345, MD6228, and MD6471, and the HP ScanJet 2300c.

Note: adding even a short (50cm) USB extension cord caused various commands to fail (!) Make sure the scanner is connected to a sufficiently powered port with a single cable of normal length.

The command sane-find-scanner should produce something like:
found USB scanner (vendor=0x04a9 [Canon], product=0x2213 [CanoScan], chip=GL841) at libusb:001:009

The command scanimage -L gives:
device `genesys:libusb:001:009' is a Canon LiDE 35/40/50 flatbed scanner

To scan, you can either use scanimage from the command line, for example: scanimage --mode Color --depth 8 --resolution 75 --format=tiff --verbose > scan.tiff
(max resolution is 2400). Run scanimage --help to get a list of available options.

Or scan with a GUI with xsane