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Export Reference (APA) 
Gaspar, F., Dias, M. S. & Bastos, R. (2021). Infrared tracking system for immersive virtual environments. In Coelho, A., and Cláudio, A. P. (Ed.), Actas do 17º Encontro Português de Computação Gráfica: Realidade Virtual e Aumentada, Reconstrução 3D e Visão por Computador. (pp. 45-56). Covilhã: Eurographics Association.
Export Reference (IEEE) 
F. A. Gaspar et al.,  "Infrared tracking system for immersive virtual environments", in Actas do 17º Encontro Português de Computação Gráfica: Realidade Virtual e Aumentada, Reconstrução 3D e Visão por Computador, Coelho, A., and Cláudio, A. P., Ed., Covilhã, Eurographics Association, 2021, pp. 45-56
Export BibTeX 
@inproceedings{gaspar2021_1716153993861,
	author = "Gaspar, F. and Dias, M. S. and Bastos, R.",
	title = "Infrared tracking system for immersive virtual environments",
	booktitle = "Actas do 17º Encontro Português de Computação Gráfica: Realidade Virtual e Aumentada, Reconstrução 3D e Visão por Computador",
	year = "2021",
	editor = "Coelho, A., and Cláudio, A. P.",
	volume = "",
	number = "",
	series = "",
	doi = "10.2312/pt.20091211",
	pages = "45-56",
	publisher = "Eurographics Association",
	address = "Covilhã",
	organization = "Eurographics Association",
	url = "https://diglib.eg.org/handle/10.2312/2633067"
}
Export RIS 
TY  - CPAPER
TI  - Infrared tracking system for immersive virtual environments
T2  - Actas do 17º Encontro Português de Computação Gráfica: Realidade Virtual e Aumentada, Reconstrução 3D e Visão por Computador
AU  - Gaspar, F.
AU  - Dias, M. S.
AU  - Bastos, R.
PY  - 2021
SP  - 45-56
DO  - 10.2312/pt.20091211
CY  - Covilhã
UR  - https://diglib.eg.org/handle/10.2312/2633067
AB  - In this paper, we describe the theoretical foundations and engineering approach of an infrared-optical tracking system specially design for large scale immersive virtual environments (VE) or augmented reality (AR) settings. The system described is capable of tracking independent retro-reflective markers arranged in a 3D structure (ar-tefact) in real time (25Hz), recovering all possible 6 Degrees of Freedom (DOF). These artefacts can be ad-justed to the user’s stereo glasses to track his/her pose while immersed in the VE or AR, or can be used as a 3D input device. The hardware configuration consists in 4 shutter-synchronized cameras attached with band-pass infrared filters and the artefacts are illuminated by infrared array-emitters. The system was specially designed to fit a room with sizes of 5.7m x 2.7m x 3.4 m, which match the dimensions of the CAVE-Hollowspace of Lousal where the system will be deployed. Pilot lab results have shown a latency of 40ms in tracking the pose of two ar-tefacts with 4 infrared markers, achieving a frame-rate of 24.80 fps and showing a mean accuracy of 0.93mm/0.52º and a mean precision of 0.08mm/0.04º, respectively, in overall translation/rotation DOFs, fulfill-ing the system requirements initially defined.
ER  -