To provide a method for displaying an appropriate annotation for a target in augmented reality environment in which a plurality of users participates.SOLUTION: An augmented reality (AR) environment synchronization method, includes, for each of a plurality of devices associated with respective users in the AR environment, receiving plane information captured in the AR environment, and generating unique identifier information of an object in the plane information; across the devices, coordinating the plane information; performing semantic features matching of the object across the devices in order to generate a match between respective objects in each environment sensed by the devices; and providing synchronization control to the devices, in order to permit an annotation of the matched object to be locked to a landmark and the plane of one of the devices with respect to others of the devices.SELECTED DRAWING: Figure 3
SYSTEM, METHOD, AND PROGRAM FOR SEMANTIC OR VISUAL COLLABORATIVE AUGMENTED REALITY