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The use of surrounding visual context in handheld AR: device vs. user perspective rendering

Research output: Contribution in Book/Report/ProceedingsPaper

Published

Publication date28/04/2014
Host publicationCHI '14 Proceedings of the 32nd annual ACM conference on Human factors in computing systems
Place of publicationNew York
PublisherACM
Pages197-206
Number of pages10
ISBN (Print)9781450324731
Original languageEnglish

Conference

ConferenceCHI 2014
CountryCanada
CityToronto
Period26/04/141/05/14

Conference

ConferenceCHI 2014
CountryCanada
CityToronto
Period26/04/141/05/14

Abstract

The magic lens paradigm, a commonly used descriptor for handheld Augmented Reality (AR), presents the user with dual views: the augmented view (magic lens) that appears on the device, and the real view of the surroundings (what the user can see around the perimeter of the device). The augmented view is typically implemented by rendering the video captured by the rear-facing camera directly onto the device’s screen. This results in dual perspectives—the real world being captured from the device’s perspective rather than the user’s perspective (what an observer would see looking through a transparent glass pane). These differences manifest themselves in misaligned and/or incorrectly scaled transparency resulting in the dual-view problem. This paper presents two user studies comparing (a) device-perspective and (b) fixed Point-of-View (POV) user-perspective magic lenses to analyze the effect of the dual-view problem on the use of the surrounding visual context. The results confirm that the dual-view problem, a result of dual perspective, has a significant effect on the use of information from the surrounding visual context. The study also highlights that magnification and not the dual-view problem is the key factor explaining the correlation between magic lens size and the increased intensity of the magic lens type effect. From the results, we derive design guidelines for future magic lenses.