SPEED MEASUREMENT SYSTEM, SPEED MEASUREMENT METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a speed measurement system that accurately measures a vehicle speed running on a road by simple processing.SOLUTION: A vehicle 10 running on a road is photographed by a first camera 20 and a second camera 21 from a direction substantially orthogonal to the running direction. When a variation amount of a total of pixel values is equal to or more than a predetermined value, a peak of the variation amount is detected from a photographed image of the first camera 20 to select target images having the variation amount equal to or more than a predetermined ratio with respect to the peak thereof. A frame image in which an image of a vehicle estimated part is present at a substantially center of the target image is specified, and the same image as the vehicle estimated part of the frame image is generated as a template. With respect to images photographed by the first camera 20 and the second camera 21 at two times out of the target images, template matching is performed. Based on a position relative to the frame image of a reference point in the template, a three-dimensional coordinate of a position indicated by the reference point is obtained to calculate a speed of the vehicle 10 based on a time difference between two times and a movement amount of two three-dimensional coordinates.