Frame synchronization of high-speed vision sensors with respect to temporally encoded illumination in highly dynamic environments

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The authors propose a Manchester Encoding inspired illumination modulation strategy to properly index the temporally-aligned vision frames, which are successfully synchronized by the LED reference signal. Based on signal normalization, Manchester Encoded reference signals carry temporal information owing to serial communication and thus can timestamp the output vision frame. Both simulated and experimental results show satisfactory robustness to various disturbances, such as dynamic targets, fluctuant optical intensity, and unfixed cameras, etc. The 1, 000 Hz vision sensor is locked to 500 Hz temporally modulated LED illumination with only 24 μs jitters. This result is believed to be applicable to low-cost wireless vision sensor network.

Original languageEnglish
Pages (from-to)4102-4121
Number of pages20
JournalSensors (Switzerland)
Volume13
Issue number4
DOIs
Publication statusPublished - 2013 Apr 1

Keywords

  • Camera synchronization
  • Intelligent coding
  • Manchester encoding
  • Phase-locked loop
  • Quadrature detection
  • Robot vision
  • Signal normalization
  • Vision chip
  • Visual feedback control

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

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