This work describes our work in developing the human-computer interface of an augmented reality (AR) system designed to facilitate the accurate selection of real world locations in 3D space using 3D cursors. The results of two experiments undertaken to evaluate the influence of certain sources of additional depth information and degree of interface control are presented. The merits of stereoscopic displays and various cursor designs are also investigated. Results indicate that the benefits of stereoscopic displays do not significantly outweigh the benefits offered by increased control and additional positional information when performing simple object selection tasks in unprepared AR environments.

The combination of augmented reality (AR) systems and stereoscopic display devices has created a powerful tool with which to "supplement" our view. One application for such systems is for the augmented teleoperation of unmanned vehicles, deployed in remote or hazardous environments. Research in this area has highlighted the need for accurate 3D measurement techniques - such as through the use of virtual cursors. This paper describes our work in the development of an AR interface designed to assist the accurate selection of position in 3D space. We describe some preliminary experimental work using virtual cursors before discussing how we believe depth cues can be utilized to allow a user to make a more informed judgment of depth in unprepared environments. It is expected that the guidelines outlined in this report will be used as a benchmark for the development of further 3D ARA cursors.