Ключевые слова: alertness, background, big brother, blue, business, camcorder, camera, cctv, city, concepts, control, electrical, electronics, equipment, eye, feature, guard, home, instrument, lens, looking, objects, optical, outdoors, ownership, photographic, pillar, power, privacy, private, protection, rendering, safety, security, set, shadowing, sky, spy, surveillance, system, technique, technology, tree, videcam, video, view, wall, watching,