Outline Pursuits: Gaze-assisted Selection of Occluded Objects in Virtual Reality


In 3D environments, objects can be difficult to select when they overlap, as this affects available target area and increases selection ambiguity. We introduce Outline Pursuits which extends a primary pointing modality for gaze-assisted selection of occluded objects. Candidate targets within a pointing cone are presented with an outline that is traversed by a moving stimulus. This affords completion of the selection by gaze attention to the intended target's outline motion, detected by matching the user's smooth pursuit eye movement. We demonstrate two techniques implemented based on the concept, one with a controller as the primary pointer, and one in which Outline Pursuits are combined with head pointing for hands-free selection. Compared with conventional raycasting, the techniques require less movement for selection as users do not need to reposition themselves for a better line of sight, and selection time and accuracy are less affected when targets become highly occluded.

Virtual reality, Occlusion, Eye tracking, Smooth pursuits
Ludwig Sidenmark
Lancaster University, Lancaster, United Kingdom
Christopher Clarke
Lancaster University, Lancaster, United Kingdom
Xuesong Zhang
Katholieke Universiteit Leuven, Leuven, Belgium
Jenny Phu
Ludwig Maximilian University of Munich, Munich, Germany
Hans Gellersen
Aarhus University, Aarhus, Denmark



会議: CHI 2020

The ACM CHI Conference on Human Factors in Computing Systems

セッション: VR & physical real input

Paper session
311 KAUA'I
2020-04-29 20:00:00
2020-04-29 21:15:00