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After the facial recognition system is connected to the video surveillance system, the recognition software will search for facial information in the camera's field of view. If there is a face in the field of vision, it will detect it within a fraction of a second. It uses multi-scale algorithms to search for facial images at low resolution. An algorithm is a program that provides a set of instructions to complete a specific task. The system only switches to high-resolution search after detecting a shape similar to a head.

Your face is an important element that identifies you, and others will also recognize you through your face. Imagine how difficult it would be to recognize a person if all faces were the same. Apart from twins who look almost identical, a face is undoubtedly the most unique physical feature of a person. Not only do humans have the innate ability to recognize and distinguish millions of different faces, but computers are also catching up with this ability.