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Face detection

Face detection is a technology that automatically searches for and identifies human faces in a camera's frame. Once the camera's processor recognizes a face in the image, it uses this information to optimize settings for taking the photograph. Specifically, it focuses on focus and exposure. This means that the camera automatically focuses on the detected face and adjusts the amount of light so that the face is properly lit, neither too dark nor overexposed. Modern systems can recognize multiple faces at once and often allow the photographer to select which one should be the main point of focus. It is important not to confuse this function with face recognition, which is a technology that not only finds a face but also determines who the person is. Detection merely localizes the presence of a face in the image.

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