  The feedback of consumers who pass by an advertisement board is crucial for
the marketing teams of corporate companies .If the emotions of a consumer are
analyzed after exposure to the advertisement, it would help to rate the quality
of the advertisement .The state of the art emotion analyzers can do this task
seamlessly .However, if the consumer moves away from the center of the
advertisement board, it becomes difficult for the camera to capture the person
with sufficient details .Here, the role of an auto-pan and tilt camera is
imminent if a person moves out from the frame limits of the camera .This paper
aims to help solve the above issue by panning and tilting the camera by precise
amount automatically using facial detection and interpolation algorithms .We
propose a method where a camera attached to servo motors can automatically pan
and tilt such that the subject is always in the center of the frame .This would
be done by facial detection and interpolation of its position with respect to
the angle of the camera .The direction of the camera is controlled with the
help of a microcontroller, which takes-in the angle values of where the camera
needs to move in order to maintain the subject's face in the center .We have
designed a system that works on the Arduino platform and can pan and tilt the
camera in real-time.
