TRAFFIC FLOW ESTIMATION DEVICE, TRAFFIC FLOW ESTIMATION METHOD, TRAFFIC FLOW ESTIMATION PROGRAM, AND STORAGE MEDIUM STORING TRAFFIC FLOW ESTIMATION PROGRAM

摘要

Provided is a traffic flow estimation device (1) that estimates a traffic flow of a target area. The traffic flow estimation device (1) includes a storage unit (30) storing lane information of a target area whose traffic flow is to be estimated, and acquires a plurality of images and position information and speed information, the plurality of images being captured at a plurality of different timings by a first moving object (6) that is in motion in the target area and including a second moving object (7) around the first moving object, the position information and speed information being of the first moving object whose images are captured at the timings; identifies a lane in which the first moving object is in motion; calculates, based on the images, a change over time of positions of the second moving object in the images; estimates a lane in which the second moving object is in motion based on a positional relationship of the second moving object with respect to the first moving object detected in the images; and estimates a traffic flow for each lane in the target area based on the speed information of the first moving object, the information indicative of a change over time of positions of the second moving object, and the lanes in which the first moving object and the second moving object are in motion.