Fiber-optic localization by geometric space coding with a two-dimensional gray code

Yunhui Zheng, David J. Brady, Michaell E. Sullivan, Bob D. Guenther

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


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. Methode 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.

Original languageEnglish (US)
Pages (from-to)4306-4314
Number of pages9
JournalApplied optics
Issue number20
StatePublished - Jul 10 2005
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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