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Illumination-Based Synchronization of High-Speed Vision Sensors
Department of System Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan
* Author to whom correspondence should be addressed.
Received: 13 April 2010; in revised form: 5 May 2010 / Accepted: 25 May 2010 / Published: 2 June 2010
Abstract: To acquire images of dynamic scenes from multiple points of view simultaneously, the acquisition time of vision sensors should be synchronized. This paper describes an illumination-based synchronization method derived from the phase-locked loop (PLL) algorithm. Incident light to a vision sensor from an intensity-modulated illumination source serves as the reference signal for synchronization. Analog and digital computation within the vision sensor forms a PLL to regulate the output signal, which corresponds to the vision frame timing, to be synchronized with the reference. Simulated and experimental results show that a 1,000 Hz frame rate vision sensor was successfully synchronized with 32 μs jitters.
Keywords: camera synchronization; phase-locked loop; visible light communication
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Hou, L.; Kagami, S.; Hashimoto, K. Illumination-Based Synchronization of High-Speed Vision Sensors. Sensors 2010, 10, 5530-5547.
Hou L, Kagami S, Hashimoto K. Illumination-Based Synchronization of High-Speed Vision Sensors. Sensors. 2010; 10(6):5530-5547.
Hou, Lei; Kagami, Shingo; Hashimoto, Koichi. 2010. "Illumination-Based Synchronization of High-Speed Vision Sensors." Sensors 10, no. 6: 5530-5547.