Visuo-Haptic Illusions for Improving the Perceived Performance of Shape Displays

Title: Visuo-Haptic Illusions for Improving the Perceived Performance of Shape Displays

Teams: Stanford University Stanford

Writers: Parastoo Abtahi ； Sean Follmer

Publication date: Jan 2018

Abstract

In this work, we utilize visuo-haptic illusions to improve the perceived performance of encountered-type haptic devices, specifically shape displays, in virtual reality. Shape displays are matrices of actuated pins that travel vertically to render physical shapes; however, they have limitations such as low resolution, small display size, and low pin speed. To address these limitations, we employ illusions such as redirection, scaling, andretargetingthattakeadvantageofthe visualdominance effect, the idea that vision often dominates when senses conflict. Our evaluation of these techniques suggests that redirectingslopedlineswithangleslessthan40◦ ontoahorizontal line is an effective technique for increasing the perceived resolution of the display. Scaling up the virtual object onto the shape display by a factor less than 1.8x can also increase the perceived resolution. Finally, using vertical redirection a perceived 3x speed increase can be achieved