Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

6-2019

Abstract

We present LpGL, an OpenGL API compatible Low-power Graphics Library for energy efficient AR headset applications. We first characterize the power consumption patterns of a state of the art AR headset, Magic Leap One, and empirically show that its internal GPU is the most impactful and controllable energy consumer. Based on the preliminary studies, we design LpGL so that it uses the device's gaze/head orientation information and geometry data to infer user perception information, intercepts application-level graphics API calls, and employs frame rate control, mesh simplification, and culling techniques to enhance energy efficiency of AR headsets without detriment of user experience. Results from a comprehen- sive set of controlled in-lab experiments and an IRB-approved user study with 25 participants show that LpGL reduces up to 22% of total energy usage while adding only 46 sec of latency per object with close to no loss in subjective user experience.

Keywords

Augmented Reality, Energy Efficiency, Mobile Headsets

Discipline

Software Engineering

Research Areas

Software and Cyber-Physical Systems

Publication

MobiSys '19: Proceedings of the 17th Annual International Conference on Mobile Systems, Applications, and Services, Seoul, June 17-21

First Page

155

Last Page

167

ISBN

9781450366618

Identifier

10.1145/3307334.3326097

Publisher

ACM

City or Country

New York

Copyright Owner and License

Publisher

Additional URL

https://doi.org/10.1145/3307334.3326097

Download

Share

COinS