Identify the local scanner
By using lsusb, identify the productId (1909 here) :
pi:# lsusb
pi:# Bus 001 Device 005: ID 04a9:1909 Canon, Inc. CanoScan LiDE 110
With that productId, grep the correct configuration file (it depends of your scanner model, for me it is genesys.conf) :
pi:# grep 190...