The capacity to recognise a person by looking simply at their face or a photograph of their face is known as facial recognition. Extreme variations in lighting, viewing angle, and distance encountered in daily life have no impact on this capacity.The researchers found that human facial recognition abilities vary greatly through a variety of recall and identification tests on volunteers. According to the survey, most people can name between 1,000 and 10,000 acquaintances, family members, coworkers, and celebrities by face . .