@inproceedings{10.1145/3126594.3126626,
author = {Clarke, Christopher and Gellersen, Hans},
title = {MatchPoint: Spontaneous Spatial Coupling of Body Movement for Touchless Pointing},
year = {2017},
isbn = {9781450349819},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
url = {https://doi.org/10.1145/3126594.3126626},
doi = {10.1145/3126594.3126626},
abstract = {Pointing is a fundamental interaction technique where user movement is translated
to spatial input on a display. Conventionally, this is based on a rigid configuration
of a display coupled with a pointing device that determines the types of movement
that can be sensed, and the specific ways users can affect pointer input. Spontaneous
spatial coupling is a novel input technique that instead allows any body movement,
or movement of tangible objects, to be appropriated for touchless pointing on an ad
hoc basis. Pointer acquisition is facilitated by the display presenting graphical
objects in motion, to which users can synchronise to define a temporary spatial coupling
with the body part or tangible object they used in the process. The technique can
be deployed using minimal hardware, as demonstrated by MatchPoint, a generic computer
vision-based implementation of the technique that requires only a webcam. We explore
the design space of spontaneous spatial coupling, demonstrate the versatility of the
technique with application examples, and evaluate MatchPoint performance using a multi-directional
pointing task.},
booktitle = {Proceedings of the 30th Annual ACM Symposium on User Interface Software and Technology},
pages = {179–192},
numpages = {14},
keywords = {vison-based interfaces, computer vision, gesture input, pointing, input techniques, touchless input, user input, bodily interaction, motion-matching},
location = {Qu\'{e}bec City, QC, Canada},
series = {UIST '17}
}

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Conventionally, this is based on a rigid configuration of a display coupled with a pointing device that determines the types of movement that can be sensed, and the specific ways users can affect pointer input. Spontaneous spatial coupling is a novel input technique that instead allows any body movement, or movement of tangible objects, to be appropriated for touchless pointing on an ad hoc basis. Pointer acquisition is facilitated by the display presenting graphical objects in motion, to which users can synchronise to define a temporary spatial coupling with the body part or tangible object they used in the process. The technique can be deployed using minimal hardware, as demonstrated by MatchPoint, a generic computer vision-based implementation of the technique that requires only a webcam. 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