scanner epson non reconu

[raymond Liabaste]

Bonjour,
J'ai un perfection 2450 photo branché en USB, malgré la procédure 
d'installation du wiki il n'est pas reconnu par scanimage ni par xsane.
lsusb :
Bus 005 Device 006: ID 04b8:0112 Seiko Epson Corp. Perfection 2450
Bus 005 Device 001: ID 0000:0000 
Bus 003 Device 001: ID 0000:0000 
Bus 004 Device 001: ID 0000:0000 
Bus 002 Device 002: ID 055d:1031 Samsung Electro-Mechanics Co.
Bus 002 Device 003: ID 04b4:5500 Cypress Semiconductor Corp. HID->COM 
RS232 Adapter
Bus 002 Device 001: ID 0000:0000 
Bus 001 Device 003: ID 05a9:8519 OmniVision Technologies, Inc.
Bus 001 Device 001: ID 0000:0000 

sane-find-scanner :
 # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make 
sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x04b8 [EPSON], product=0x0112 [EPSON 
Scanner]) at libusb:005:006
found USB scanner (vendor=0x05a9, product=0x8519) at libusb:001:003
  # 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.
une idée ?

Merci

Raymond