METHOD, APPARATUS, ELECTRONIC DEVICE, COMPUTER PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM FOR MEASURING INTER-VEHICLE DISTANCE BASED ON VEHICLE IMAGE

A method for measuring an inter-vehicle distance includes acquiring driving image photographed by a photographing device of a first vehicle which is being driven; detecting a second vehicle from the acquired driving image; detecting first feature points of a second vehicle region in a first frame corresponding to a frame in which the second frame is detected before a frame in which the second vehicle is not detected among a plurality of frames constituting the driving image, when the second vehicle is not detected from the driving image; detecting second feature points in a second frame corresponding to a current frame by tracking the detected first feature points; calculating a feature point change value between the first feature points and the second feature points; and calculating an inter-vehicle distance from the photographing device of the first vehicle to the second vehicle based on the calculated feature point change value.