Illumination-based synchronization of high-speed vision sensors.
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.
Department of System Information Sciences, Graduate School of Information Sciences, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan. lei@ic.is.tohoku.ac.jp
Lei
L
Hou
Shingo
S
Kagami
Koichi
K
Hashimoto
D000465:Algorithms; D001185:Artificial Intelligence; D003195:Computer Communication Networks / Q000295:instrumentation*; D003198:Computer Simulation; D006801:Humans; D008027:Light; D008029:Lighting; D008954:Models, Biological; D009038:Motion; D010775:Photic Stimulation; D058998:Remote Sensing Technology / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014785:Vision, Ocular / Q000502:physiology