Improving VR Selection using Progressive Refinement with Multi-Touch Marking Menus
Elaheh Samimi · 2021
Selection is the process of acquiring targets for subsequent operations (e.g., moving or rotating them) in Virtual Reality (VR) systems.Many selection techniques have been introduced to improve selection performance; nonetheless, 3D selection is still cumbersome.We developed a technique to improve selection time and accuracy concurrently by combining progressive refinement and CountMarks.Our technique, Multi-Touch Progressive Refinement (MTPR), enhanced conventional progressive refinement's quad menu object selection by using CountMarks, a multi-finger touchbased technique previously developed to facilitate marking menu selection on smartphones.In a first user study, we compared our technique with progressive refinement and multi-touch techniques in terms of search time, selection time, and accuracy.The results showed that the multi-touch was fastest and progressive refinement was most accurate.However, we also found that participants were slightly confused by our MTPR technique.Therefore, we enhanced our technique by ordering objects inside menu and labelling them.We ran a second study comparing our Improved Multi-Touch Progressive Refinement Selection Strategy (IMPReSS) with the previous two techniques.The result demonstrated that IMPReSS was both the fastest and most accurate of all the techniques evaluated.iii