1. An apparatus comprising: an input for receiving images from an image sensor of a camera unit; a processor configured to: monitor locations of different objects in the received images, wherein the monitoring of locations of different objects involves determining a position of the different objects along an axis extending between the camera unit and the different objects; determine which if any of the different objects is a primary object that is or should be of interest to a user; and detect if any primary object becomes occluded by another one of the different objects and responsively to detection of such occlusion to trigger a first action, wherein the processor is further configured to determine, using the determined position of different objects along the axis extending between the camera unit and the different objects, how much the camera unit should be moved laterally to avoid occlusion of primary objects, and wherein the first action comprises issuing a movement signal indicative of a direction to which, and how much, the camera unit should be moved laterally to avoid the occlusion.