Ing. Michal Zachariáš
| SZENTANDRÁSI István, ZACHARIÁŠ Michal, HAVEL Jiří, HEROUT Adam, DUBSKÁ Markéta and KAJAN Rudolf. Uniform Marker Fields: Camera Localization By Orientable De Bruijn Tori. In: Proceedings of the 2012 11th IEEE International Symposium on Mixed and Augmented Reality. Atlatnta, Georgia: Institute of Electrical and Electronics Engineers, 2012, pp. 1-2. ISBN 978-1-4673-4661-0. | | Publication language: | english |
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| Original title: | Uniform Marker Fields: Camera Localization By Orientable De Bruijn Tori |
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| Title (cs): | Uniform Marker Fields: Lokalizace kamery na základě orientovatelných De Bruijn sekvencí |
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| Pages: | 1-2 |
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| Proceedings: | Proceedings of the 2012 11th IEEE International Symposium on Mixed and Augmented Reality |
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| Conference: | 11th IEEE International Symposium on Mixed and Augmented Reality |
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| Place: | Atlatnta, Georgia, US |
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| Year: | 2012 |
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| ISBN: | 978-1-4673-4661-0 |
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| Publisher: | Institute of Electrical and Electronics Engineers |
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| Keywords |
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| Fiduciary Markers, Nested Marker, Seamless Marker, Overlapping Markers, Camera Localization, Augmented Reality, De-Bruijn Tori, Genetic Algorithm, Perfect Maps, UMF |
| Annotation |
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| In various applications, a wider area needs to be covered by fiduciary
markers but a large marker cannot be used because only a fraction of the
area is to be viewed by the camera. Such an area can be covered by a
number of small markers with unique identifiers. However, with the
camera freely moving in the scene and with occluders present, it is
difficult to ensure that at least one of the individual markers is
completely visible, unless the markers are small and numerous. In that
case, the markers are not recognizable from larger distances. In this
paper we introduce the concept of Marker Fields which overcome this
limitation. The Marker Field covers a large-scale planar (or non-planar)
area and it is composed of mutually overlapping partial markers. We
propose a particular arrangement of the Marker Field: a Uniform
Checker-Board Marker Field, which is a black-and-white checkerboard
whose square modules are defined by aperiodic 4-orientable binary
(n,n)-window arrays (De Bruijn tori). We propose a genetic algorithm for
construction of 4-orientable (n,n)-window arrays. We used a
supercomputer to synthesize large 4-orientable (n,n)-window arrays and
offer them publicly for downloading. We prototyped an algorithm for
detection of the checkerboard marker fields and measured its
performance. When processing input video from a cellphone camera, the
algorithm visits only about 5% of image pixels for reliable detection
and the processing time is about 1ms on a mid-range PC processor. The
Uniform Marker Field increases freedom of camera movement, especially
with occluders present in the scene. The detection algorithm is
efficient and real-time marker field detection will be feasible on
ultramobile devices. |
| BibTeX: |
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@INPROCEEDINGS{
author = {Istv{\'{a}}n Szentandr{\'{a}}si and Michal
Zachari{\'{a}}{\v{s}} and Ji{\v{r}}{\'{i}} Havel
and Adam Herout and Mark{\'{e}}ta Dubsk{\'{a}} and
Rudolf Kajan},
title = {Uniform Marker Fields: Camera Localization By
Orientable De Bruijn Tori},
pages = {1--2},
booktitle = {Proceedings of the 2012 11th IEEE International Symposium on
Mixed and Augmented Reality},
year = 2012,
location = {Atlatnta, Georgia, US},
publisher = {Institute of Electrical and Electronics Engineers},
ISBN = {978-1-4673-4661-0},
language = {english},
url = {http://www.fit.vutbr.cz/research/view_pub.php.en.iso-8859-2?id=10122}
} |
|
Faculty of Information Technology