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Color-Perception-Guided Display Power Reduction for Virtual Reality

September 22, 2022/in Publications

Color-Perception-Guided Display Power Reduction for Virtual Reality

Budmonde Duinkharjav*, Kenneth Chen*, Abhishek Tyagi, Jiayi He, Yuhao
Zhu, Qi Sun
ACM Transactions on Graphics (SIGGRAPH Asia 2022)
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Abstract

Battery life is an increasingly urgent challenge for today's
untethered VR and AR devices. However, the power efficiency of
head-mounted displays is naturally at odds with growing computational
requirements driven by better resolution, refresh rate, and dynamic
ranges, all of which reduce the sustained usage time of untethered AR
/VR devices. For instance, the Oculus Quest 2, under a fully-charged
battery, can sustain only 2 to 3 hours of operation time. Prior
display power reduction techniques mostly target smartphone displays.
Directly applying smartphone display power reduction techniques,
however, degrades the visual perception in AR/VR with noticeable
artifacts. For instance, the "power-saving mode" on smartphones
uniformly lowers the pixel luminance across the display and, as a
result, presents an overall darkened visual perception to users if
directly applied to VR content.

Our key insight is that VR display power reduction must be cognizant
of the gaze-contingent nature of high field-of-view VR displays. To
that end, we present a gaze-contingent system that, without degrading
luminance, minimizes the display power consumption while preserving
high visual fidelity when users actively view immersive video
sequences. This is enabled by constructing 1) a gaze-contingent color
discrimination model through psychophysical studies, and 2) a display
power model (with respect to pixel color) through real-device
measurements. Critically, due to the careful design decisions made in
constructing the two models, our algorithm is cast as a constrained
optimization problem with a closed-form solution, which can be
implemented as a real-time, image-space shader. We evaluate our
system using a series of psychophysical studies and large-scale
analyses on natural images. Experiment results show that our system
reduces the display power by as much as 24% (14% on average) with
little to no perceptual fidelity degradation.

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Bibtex

@article{Duinkharjav:2022:VRPowerSaver,
title = {Color-Perception-Guided Display Power Reduction for Virtual
Reality},
author = {Duinkharjav, Budmonde and Chen, Kenneth and Tyagi, Abhishek
and He, Jiayi and Zhu, Yuhao and Sun, Qi},
journal = {ACM Trans. Graph. (Proc. SIGGRAPH Asia)},
volume = {41},
number = {6},
pages = {144:1-144:16},
year = {2022}
}



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nyu-logo-1.jpg Qi Sun2022-09-22 02:59:572022-09-23 18:50:19
Color-Perception-Guided Display Power Reduction for Virtual Reality

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Color-Perception-Guided Display Power Reduction for Virtual Reality
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NYU tandon logo
QI SUN
Assistant Professor
Computer Science and Engineering
Center for Urban Science and Progress
NYU Tandon School of Engineering
370 Jay Street
Brooklyn, NY 11201
qisun@nyu.edu
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