1. A method of disqualifying an unsatisfactory scene as an image acquisition control for a camera, comprising: (a) acquiring a present image of a scene including a face region; (b) identifying one or more groups of pixels corresponding to a mouth region within the face region; (c) determining whether the mouth has a frowning configuration; and if so, then (d) disqualifying the scene as a candidate for a processed, permanent image while the mouth has the frowning configuration.