1. A method in a computer system for normalizing the size of images of participants in video conference having a video, the video being captured by a camera having an associated magnetometer, comprising: providing a set of constraints relating to the locations of participants relative to the camera, the constraints indicating dimensions of a table on which the camera is positioned, an initial orientation of the camera relative to the dimensions of the table and a magnetic field, and location of the camera on the table; detecting with the magnetometer an orientation of the camera relative to the magnetic field; comparing the detected orientation of the camera to the initial orientation of the camera; determining a change in orientation of the camera based on the compared detected orientation and the initial orientation, the chance in orientation due to a movement by a person of the camera relative to the table; identifying from sounds of a participant speaking a direction of the participant; automatically pointing the camera in the identified direction; and generating an image of the participant having a size adjusted to account for the location of the participant relative to the camera as indicated by the provided constraints, the identified direction, and the determined change in orientation of the camera relative to the dimensions of the table.