Information processing system, information processing method, and storage medium

An information processing method comprising:

• receiving inputs of videos captured by a plurality of imaging apparatuses;
• detecting a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses;
• deriving, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability in which both moving bodies are the same;
• deriving a second probability in which the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video;
• and
• determining whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.

A non-transitory computer readable storage medium recording thereon a program that causes a computer to execute:

• processing for receiving inputs of videos captured by a plurality of imaging apparatuses;
• processing for detecting a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses;
• processing for deriving, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability in which both moving bodies are the same;
• processing for deriving a second probability in which the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video;
• and
• processing for determining whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.