Automatic and semi-automatic annotation of people in photography using shared events

This article proposes an automatic and semi-automatic annotation technique for people in photos using the shared event concept, which consists of many photos captured by different devices of people who attended the same event. The technique uses an algorithm to group photos into personal events and then verifies which of these events are shared. The automatic annotation of people uses techniques of facial recognition and detection, while the semi-automatic annotation uses a pondered sum of estimators based on contextual information and picture content. Experiments showed that using the shared event concept increases the hit rate of automatic and semi-automatic annotations of people in the utilized photo collection.