Signal Processing - September 2016 - 139
SIGNAL PROCESSING FOR
COMPUTATIONAL PHOTOGRAPHY AND DISPLAYS
Michael Stengel and Marcus Magnor
Gaze-Contingent Computational Displays
Boosting perceptual fidelity
C
ontemporary digital displays feature multimillion pixels
at ever-increasing refresh rates. Reality, on the other
hand, provides us with a view of the world that is continuous in space and in time. The discrepancy between
viewing the physical world and its sampled depiction on digital displays gives rise to perceptual quality degradation. By
measuring or estimating where we look, a new breed of
gaze-contingent algorithms aims to exploit the way we
visually perceive digital images and videos to remedy
visible artifacts. In this article, we provide an overview of recent developments in computational
display algorithms that enhance perceived visual
quality of conventional video footage when viewed
on commodity monitors, projectors, or headmounted displays (HMDs).
Introduction
©ISTOCKPHOTO.COM/YAKOBCHUK
Digital Object Identifier 10.1109/MSP.2016.2580913
Date of publication: 2 September 2016
1053-5888/16©2016IEEE
Display technology is advancing at a breathtaking pace. Driven by consumer demand, screen size,
resolution, contrast, and refresh rates are growing
bigger, faster, and higher almost on a weekly basis.
Nevertheless, the fundamental difference between
the continuous physical world and its digitally sampled and displayed image still gives rise to perceptually
noticeable quality degradation.
For example, while TV screen resolution has been increasing from National Television System Committee/phase alternating line to high-definition (HD) and on to full-HD today,
physical screen size has grown in step, leaving the number
of pixels per inch (PPI) almost unchanged on commodity
hardware. Common full-HD screens result in a narrow vertical field-of-view of 18c when matched to eye acuity, so that
single pixels can no longer be perceived (see Table 1). Highend screens with 2,880p (5k) or 4,320p (8k) vertical resolution
are required to widen the field of view for a more immersive
viewing experience. Exceptions are smartphone displays that
do feature high pixel densities of 500-800 PPI to enable clear
IEEE SIgnal ProcESSIng MagazInE
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September 2016
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139
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Table of Contents for the Digital Edition of Signal Processing - September 2016
Signal Processing - September 2016 - Cover1
Signal Processing - September 2016 - Cover2
Signal Processing - September 2016 - 1
Signal Processing - September 2016 - 2
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Signal Processing - September 2016 - Cover3
Signal Processing - September 2016 - Cover4
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