POSITION DETECTION DEVICE AND POSITION DETECTION PROGRAM

摘要

A position detection device, wherein an image coordinates group representing the coordinates of an object in captured images constituting a first captured image group composed of a plurality of captured images captured at a reference cycle representing a cycle determined in advance, and a second captured image group captured with a timing offset by an asynchronous time and the reference cycle. A first trajectory and a second trajectory indicating transition along a chronological sequence of the image coordinates obtained from the captured image group are each subjected to Fourier transform, whereby a first frequency waveform based on the first trajectory and a second frequency waveform based on the second trajectory are computed, and the position of an object is computed on the basis of a relationship in which the frequency waveforms are offset in phase by an amount corresponding to the asynchronous time.