Type of Publication: Article in Collected Edition

Modeling Distant Pointing for Compensating Systematic Displacements

Author(s):

Mayer, Sven; Wolf, Katrin; Schneegass, Stefan; ; Henze, Niels

Title of Anthology:

Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (CHI '15)

pages:

4165-4168

Publisher:

ACM

Location(s):

New York, USA

Publication Date:

2015

ISBN:

978-1-4503-3145-6

Digital Object Identifier (DOI):

doi:10.1145/2702123.2702332

Citation:

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Abstract

Distant pointing at objects and persons is a highly expressive gesture that is widely used in human communication. Pointing is also used to control a range of interactive systems. For determining where a user is pointing at, different ray casting methods have been proposed. In this paper we assess how accurately humans point over distance and how to improve it. Participants pointed at projected targets from 2m and 3m while standing and sitting. Testing three common ray casting methods, we found that even with the most accurate one the average error is 61.3cm. We found that all tested ray casting methods are affected by systematic displacements. Therefore, we trained a polynomial to compensate this displacement. We show that using a user-, pose-, and distant-independent quartic polynomial can reduce the average error by 37.3%.

VIdeo: https://www.youtube.com/watch?v=f8NOERrhWfA