Demystifying event-based camera latency: sensor speed dependence on pixel biasing, light, and spatial activity

Jonah P. Sengupta; Stephen D. Burks

doi:10.1117/12.3016088

7 June 2024 Demystifying event-based camera latency: sensor speed dependence on pixel biasing, light, and spatial activity

Jonah P. Sengupta, Stephen D. Burks

Author Affiliations +

Proceedings Volume 13045, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXV; 130450P (2024) https://doi.org/10.1117/12.3016088
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

This report explores how various mechanisms effect the response time of event-based cameras (EBCs). EBCs are based on unconventional electro-optical IR vision sensors, which are only sensitive to changing light. Because their operation is essentially “frameless,” their response time is not dependent to a frame rate or readout time, but rather the number of activated pixels, the magnitude of background light, local fabrication defects, and analog configuration of the pixel. A test apparatus was devised using a commercial off-the-shelf EBC to extract the sensor latency’s dependence on each parameter. Under various illumination levels, results show a mean latency and temporal jitter can increase by a factor of 10 via configuring bias parameters. Furthermore, worst-case latency can exceed 1–2 ms even when 0.005% of the array is activated simultaneously. These and many other findings in the report hope to inform use of event-based sensing technology when latency is a critical component of successful application.

Conference Presentation

Citation Download Citation

Jonah P. Sengupta and Stephen D. Burks "Demystifying event-based camera latency: sensor speed dependence on pixel biasing, light, and spatial activity", Proc. SPIE 13045, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXV, 130450P (7 June 2024); https://doi.org/10.1117/12.3016088

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