CONTROL DEVICE FOR ALTERNATE REALITY SYSTEM, ALTERNATE REALITY SYSTEM, CONTROL METHOD FOR ALTERNATE REALITY SYSTEM, PROGRAM, AND RECORDING MEDIUM

摘要

The control device (110) comprises a past video image acquirer (402) acquiring a past video image captured at a given location, a live video image acquirer (406) acquiring a live video image captured at the given location, and a video image switcher (412) switching the video image displayed by a head-mounted display (136) at the given location between the past video image and live video image.