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Face recognition
A growing number of digital cameras now inclded a face-recognition mode. The camera detects faces in a scene and then automatically focuses (AF) and optimizes exposure (AE) and flash output.
The technology is said to be effective when taking pictures of large groups, when a person is in the distance or when the subject moves into the frame. Even if a person moves, the camera will stay focused on it and adjust exposure.
Some digital cameras also have a tracking function that allows the user manually give priority to a single face. This comes in handy when taking photos in a crowd, at school plays and the like.
Face the digital camera
A person's face must be facing towards the camera for face-recognition AF/AE to work effectively. It also works best when taking photos in good light.
Face recognition, also known as face-priority, is typically activated when switching a camera to portrait mode or a dedicated face-detecting shooting mode. Since the technology is hardware based, it is generally faster than manually composing and locking focus and exposure on a face.
A word of caution about using face detection
It's important to note that face detection (FD) may be associated with a multi-point autofocus mode, where the camera determines where to focus, not you. When a face is not detected in a scene, the camera will revert to this mode. Many find autofocus modes to be unreliable and use Single Area focus mode instead. They only switch to FD mode when photographing people.
Almost all digital camera manufacturers offer cameras that have face recognition.
Soul Mate photo by Chad Forbes - Creative Commons Copyright 2006. (Face detection box is simulated by Digicamhelp).
