Scope - Quality retaining display rendering workload scaling based on user-smartphone distance


Conference Paper

© 2016 ACM. Modern smartphone display system come equipped with powerful GPU's capable of rendering advanced 2D and 3D graphics. These GPU's make up a significant portion of the system power profile due to the high resolution and framerate of smartphone display. These display features are selected during the design phase of a smartphone and correspond to the capabilities of the human visual system (HVS). However, the level of detail observable by the HVS is not static and changes with user-smartphone distance. In this paper we propose Scope, a system which alters the rendering resolution and framerate on a smartphone to scale display rendering workload in response to real time changes in user-smartphone distance. We demonstrate a new method of measuring this distance in real-time which is able to minimize front-facing camera sampling through the use of sensor fusion techniques. The result is that Scope requires a power overhead of only 20mW on average as the front-facing camera need only be sampled 4 times per minute. We demonstrate that Scope is able to reduce smartphone power consumption up to 58% while retaining visual quality in most cases.

Full Text

Duke Authors

Cited Authors

  • Nixon, KW; Chen, X; Chen, Y

Published Date

  • November 7, 2016

Published In

Volume / Issue

  • 07-10-November-2016 /

International Standard Serial Number (ISSN)

  • 1092-3152

International Standard Book Number 13 (ISBN-13)

  • 9781450344661

Digital Object Identifier (DOI)

  • 10.1145/2966986.2967073

Citation Source

  • Scopus