MONTEREY, Calif.--Get ready for a new era in which your camera knows not just when you took a picture but who's in it, too.
Many cameras today can detect the faces of those being photographed, which is handy for guiding the camera to set its exposure, focus, and color balance properly. But the more difficult challenge of face recognition is more useful after the photo has been taken.
That's because of a concept called autotagging, one of a number of technologies that make digital photography qualitatively different from the film photography of the past.
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