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Content-Aware Automated Parameter Tuning for Approximate Color Transforms

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Samarakoon, Chatura  ORCID logo  https://orcid.org/0000-0002-6732-4056
Stanley-Marbell, Phillip  ORCID logo  https://orcid.org/0000-0001-7752-2083

Abstract

There are numerous approximate color transforms reported in the literature that aim to reduce display power consumption by imperceptibly changing the color content of displayed images. To be practical, these techniques need to be content-aware in picking transformation parameters to preserve perceptual quality. This work presents a computationally-efficient method for calculating a parameter lower bound for approximate color transform parameters based on the content to be transformed. We conduct a user study with 62 participants and 6,400 image pair comparisons to derive the proposed solution. We use the user study results to predict this lower bound reliably with a 1.6% mean squared error by using simple image-color-based heuristics. We show that these heuristics have Pearson and Spearman rank correlation coefficients greater than 0.7 (p<0.01) and that our model generalizes beyond the data from the user study. The user study results also show that the color transform is able to achieve up to 50% power saving with most users reporting negligible visual impairment.

Description

Keywords

cs.HC, cs.HC

Journal Title

Extended Abstracts - 22nd International Conference on Human-Computer Interaction with Mobile Devices and Services: Expanding the Horizon of Mobile Interaction, MobileHCI 2020

Conference Name

Journal ISSN

Volume Title

Publisher

ACM

Rights

All rights reserved
Sponsorship
EPSRC (EP/P027628/1)
Engineering and Physical Sciences Research Council (EP/N509620/1)
EPSRC (1950511)