Ключевые слова: background, big, blue, brother, built, business, camera, color, computer, concepts, control, danger, electrical, electronics, equipment, exterior, glass, guard, horizontal, image, industry, instrument, isolated, lens, looking, nobody, office, optical, outdoors, pole, privacy, protection, render, safety, secrecy, security, shape, structure, surveillance, system, technology, threedimensional, urban, video, view, wall, watching, white,