To get the scanner to work you have to download and install the drivers from canon. This also supplies a scanner program that should work with your scanner.
The installation is done by untarring the downloaded file by right clicking on it and selecting expand here (could be slightly different as i am translating from a dutch system). This will create a new folder in the same folder as the downloaded file with the same name as the filename of the download.
This folder contains a couple of files. select the one ending with -deb.tar.gz. Right click on it and select expand here. This will create a new folder in the same folder you are working in. Right click this folder and select open in terminal
This will again create a new folder in the folder you are working in. Right click this folder and select open in, and terminal in the menu that appears.
in the terminal and press enter. Enter your password when prompted.
Now you can scan using the program canon provided, unfortunately the build in scanner program won't work, and the canon program won't appear in the applications menu. To start the canon program open the terminal from the menu. In the terminal type
and press enter. The canon program will open and should find your scanner.