Dating system and date position judging system for photographs

摘要

A plurality of photographs taken in a time series are divided into pieces of image data, and a probability that date information can be extracted from the piece of image data is judged by pieces of image data. The date information is preferentially extracted from the piece of image data which is higher in the probability, and a piece of image data, representing a photograph taken between a pair of photographs represented by a pair of pieces of image data having the same date information, is given the same date information.