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@InProceedings{ISMAR18-dps,
author = {Kenneth R. Moser and Mohammed Safayet Arefin and J. Edward {Swan~II}},
title = {Impact of Alignment Point Distance and Posture on SPAAM
Calibration of Optical See-Through Head-Mounted Displays},
booktitle = {Proceedings of IEEE International Symposium on Mixed and
Augmented Reality (ISMAR 2018)},
year = 2018,
location = {Munich, Germany},
publisher = {IEEE Computer Society},
date = {October 16--20},
month = {October},
pages = {21--30},
note = {DOI: 10.1109/ISMAR.2018.00025.}
abstract = {
The use of Optical See-Through (OST) technology for presenting
Augmented Reality (AR) experiences is becoming more common. However,
OST-AR displays require a calibration procedure, in order to determine
the location of the user's eyes. Currently, the predominantly cited
manual calibration technique is the Single Point Active Alignment
Method (SPAAM). However, with the SPAAM technique, there remains
uncertainty about the causes of poor calibration results. This paper
reports an experiment which examined the influence of two factors on
SPAAM accuracy and precision: alignment point distribution, and user
posture. Alignment point distribution is examined at user-centered
reaching distances, 0.15 to 0.3 meters, as well as
environment-centered room-scale distances, 0.5 to 2.0 meters. User
posture likely contributes to misalignment error, and is examined at
the levels of sitting and standing. In addition, a control condition
replaces the user with a rigidly-mounted camera, and mounts the OST
display on a precisely-adjustable tripod. The experiment finds that
user-centric distributions are more accurate than environment-centric
distributions, and, somewhat surprisingly, that the user's posture has
no effect. The control condition replicates these findings. The
implication is that alignment point distribution is the predominant
mode for induction of calibration error for SPAAM calibration
procedures.
},
}