Facial recognition technology(人脸识别技术) is widely used today. For example, police use it(search) for criminals. It's also used to unlock phones or doors. Now, a similar technology, (know) as facial detection(探测), is entering a new field: the business of advertising.
Such systems are going through tests in small number of stores. One facial detection system can tell a person's "(happy)" or "fear" level. That helps businesses see people feel as they look at products or advertisements in the store. Another system can detect someone is wearing eyeglasses or not. If so, stores can send advertisements for new glasses to(he).
Supporters of the technology say it could improve buyers' experience by showing products they might like or by offering them products at lower(price).
Some are against the idea of(use) such systems. Pam Dixon, the heada privacy(隐私) group, is one of them. She thinks the strange actions may cause something unfair. For example, a business could raise the price of a product according to a person's age and feelings.
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