1. An inventory control system for determining an inventory condition of objects stored in the system, the system comprising: at least one storage drawer, each storage drawer including a plurality of storage locations for storing objects, wherein each drawer is associated with an identifier with known color attributes; a data storage system storing, for each storage drawer, information of the known color attributes of the associated identifier; a data processor configured to: access data of a captured image of one of the storage drawers along with the associated identifier; access information of the known color attributes of the identifier associated with the drawer corresponding to the captured image; determine color attributes of the identifier in the captured image; determine a correction factor based on the color attributes of the identifier in the captured image and the known color attributes of the identifier; and apply the correction factor to subsequent images captured by the image sensing device.