In accordance with an example embodiment of the present invention, a method and corresponding apparatus and computer program are disclosed for: receiving images from an image sensor of a camera unit (505); monitoring locations of different objects in the received images (510); determining which if any of the different objects is a primary object that is or should be of interest to a user (515); and detecting if any primary object becomes occluded by another one of the different objects and responsively to detection of such occlusion triggering a first action (520).