Publications [#280514] of David J. Brady
- Zheng, Y; Brady, DJ; Sullivan, ME; Guenther, BD, Fiber-optic localization by geometric space coding with a two-dimensional gray code.,
Applied Optics, vol. 44 no. 20
pp. 4306-4314, ISSN 0003-6935 , [doi]
(last updated on 2019/11/14)
With the objective of monitoring motion within a room, we segment the two-dimensional (2D) floor space into discrete cells and encode each cell with a binary code word generated by a fiber. We design a set of k-neighbor-local codes to localize an extended object and, particularly when k = 2, employ a 2D gray code to localize a human by tracking his or her footsteps. Methods for implementing the codes in a fiber web are discussed, and we demonstrate the experimental result with the fiber mat. The observed system performance confirms the theoretical analysis. The space coding technique is a promising low-cost candidate not only for human tracking but also for other applications such as human gait analysis.
Fiber optics;Image coding;Computational geometry;Binary codes;Cost effectiveness;Data communication equipment;