In Australia the supermarkets use cameras pointed at the scanner and AI to visually match items. When you scan a steak as bananas, it notices something isn't right, puts an image of the item you weighed, and the item you selected on screen and flags a staff member to verify it.

As a nice bonus, when you open the selection menu, it has the item you want shown up front so you don't have to search for it most of the time.