An image is stored in most databases, include SQLite, as a so-called BLOB (binary large object). So create a table that has one column being of datatype BLOB. The other columns could things like image name, image data, etc.
For an example on how to fill and read a the table with a BLOB see this example here:http://stackoverflow.com/questions/625029/how-do-i-store-and-retrieve-a-blob-from-sqlite
I would recommend reading one of the tutorials about SQLite first, in order to get a general overview on how SQL commands are formatted and sent to the database and how results are to be retrieved.