An apparatus includes a camera and a processor. The camera may be configured to capture video data. The processor may be configured to (A) process the video data, (B) generate control signals used to initiate a stimulus and (C) execute computer readable instructions. The computer readable instructions may be executed by the processor to perform video analysis on video frames of the captured video data to (a) detect a person, (b) detect context information associated with the detected person and (c) determine facial recognition results of the detected person. If the facial recognition results cannot detect a face of the detected person, the processor selects the stimulus from a plurality of stimuli. The stimulus may be selected in response to the context information to increase a probability of detecting a frontal view of the face of the detected person.