Evaluation of Drop Shadows for Virtual Object Grasping in Augmented Reality

Al-Kalbani, Maadh and Frutos-Pascual, Maite and Williams, Ian (2020) Evaluation of Drop Shadows for Virtual Object Grasping in Augmented Reality. IEEE Computer Graphics and Applications. ISSN 0272-1716

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Abstract

This paper presents the use of rendered visual cues as drop shadows and their impact on overall usability and accuracy of grasping interactions for monitor-based exocentric Augmented Reality (AR). We report on two conditions; grasping with drop shadows and without drop shadows and analyse a total of 1620 grasps of two virtual object types (cubes and spheres). We report on the accuracy of one grasp type, the Medium Wrap grasp, against Grasp Aperture (GAp), Grasp Displacement (GDisp), completion time and usability metrics from 30 participants. A comprehensive statistical analysis of the results is presented giving comparisons of the inclusion of drop shadows in AR grasping. Findings showed that the use of drop shadows increases usability of AR grasping while significantly decreasing task completion times. Furthermore, drop shadows also significantly improve user’s depth estimation of AR object position. However, this study also shows that using drop shadows does not improve user’s object size estimation, which remains as
a problematic element in grasping AR interaction literature.

Item Type:	Article
Additional Information:	© 2020 IEEE.  Personal use of this material is permitted.  Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
Identification Number:	10.1109/MCG.2020.2991839
Dates:	Date Event 28 April 2020 Accepted 6 May 2020 Published
Uncontrolled Keywords:	Augmented Reality, Interaction, HCI, Usability, Serious Games
Subjects:	CAH11 - computing > CAH11-01 - computing > CAH11-01-01 - computer science
Divisions:	Faculty of Computing, Engineering and the Built Environment Faculty of Computing, Engineering and the Built Environment > College of Computing
Depositing User:	Maite Frutos
Date Deposited:	06 May 2020 08:00
Last Modified:	22 Mar 2023 12:01
URI:	https://www.open-access.bcu.ac.uk/id/eprint/9216

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