A cabinet that has manually reconfigurable shelves, that can automatically detect the configuration of compartments in a shelf, and that can automatically detect if a user is accessing or restocking the right compartment is contemplated. The shelf can be reconfigured using one or more dividers to divide the shelf into two or more compartments. The compartments can have different sizes and store different items. The compartments can be physically reconfigured by the user and the cabinet can automatically detect the specifics of the reconfiguration and adjust compartment size and availability. A surface of the shelf includes a plurality of visual markers. The cabinet has cameras mounted to it and uses visual markers to determine if a compartment contains an item and other information.