An image is a picture or other representation of a person or thing, or it can be someone's public perception, like a rock star who tries to change his image by dressing like a professor and learning to play chess.
Image has its roots in the Latin word imitari, meaning "to copy or imitate"; images are judged by how realistically they capture the person or thing they show. Images come in various forms — portraits, photographs, paintings, and sculptures. Another kind of image is what we think a public figure like a celebrity is "really like." For example, a flat-broke former millionaire who wants to maintain his image as the money-spending life of the party.