/opt/bin/sane-find-scanner -v
This is sane-find-scanner from sane-backends 1.0.23
found USB scanner (vendor=0x04a9 [Canon], product=0x190a [CanoScan], chip=GL124) at libusb:002:004
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.
 
  # Not checking for parallel port scanners.
 
  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.
 
  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.
done

/opt/bin/scanimage -L
 
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).

# Canon CanoScan Lide 210
usb 0x04a9 0x190a