Age progression
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Age progression is the process of modifying a photograph of a person to represent the effect of aging on their appearance. Digital image processing is the most common technique today, although sometimes artists' drawings are used. Age progression is most often used as a forensics tool by law enforcement. It can be used to show the likely current appearance of a missing person from a photograph many years old.
Age progression is also a literary theme used in transformation fiction involving the rapid aging of a character. See Age regression.