the technology ensures that staff members can offer a more personalized service - and don't unwittingly miss out on potentially lucrative sales - by flagging up famous or wealthy big spenders.
the sunday times reports that the system, created by cambridge-based company nec it solutions, works by scanning the faces of customers as they enter a store and checking them against a database.
the staff can then be alerted via computer, ipad or smartphone - along with details such as clothes size, favorite buys and spending history.
the system is currently being tried out in unnamed designer boutiques and hotels in the uk, the us and the far east. previously, the company has designed software to help identify terrorists and criminals for security services.