A person with a photographic memory could remember every detail of a picture, a book or an event many years later, but it has not been proved there are people who really have photographic memories. Yet, there are some people who do have (amaze) memories. For example, Daniel Tammet can remember the first 22,514 digits of pi (π) and Stephen Wiltshire can draw a detailed picture of a city from memory after flying over it in a helicopter. They are both good remembering particular things for a limited time.
