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Sensors 2016, 16(11), 1875;

A Selective Change Driven System for High-Speed Motion Analysis

Departament d’Informàtica, Escola Tècnica Superior d’Enginyeria, Universitat de València, Avd. de la Universidad, s/n, 46100 Burjassot, Spain
Author to whom correspondence should be addressed.
Academic Editor: Gonzalo Pajares Martinsanz
Received: 29 July 2016 / Revised: 28 October 2016 / Accepted: 3 November 2016 / Published: 8 November 2016
(This article belongs to the Special Issue Imaging: Sensors and Technologies)
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Vision-based sensing algorithms are computationally-demanding tasks due to the large amount of data acquired and processed. Visual sensors deliver much information, even if data are redundant, and do not give any additional information. A Selective Change Driven (SCD) sensing system is based on a sensor that delivers, ordered by the magnitude of its change, only those pixels that have changed most since the last read-out. This allows the information stream to be adjusted to the computation capabilities. Following this strategy, a new SCD processing architecture for high-speed motion analysis, based on processing pixels instead of full frames, has been developed and implemented into a Field Programmable Gate-Array (FPGA). The programmable device controls the data stream, delivering a new object distance calculation for every new pixel. The acquisition, processing and delivery of a new object distance takes just 1.7 μ s. Obtaining a similar result using a conventional frame-based camera would require a device working at roughly 500 Kfps, which is far from being practical or even feasible. This system, built with the recently-developed 64 × 64 CMOS SCD sensor, shows the potential of the SCD approach when combined with a hardware processing system. View Full-Text
Keywords: CMOS image sensor; event-based vision; high-speed visual acquisition; data-flow architecture; FPGA system; laser scanning CMOS image sensor; event-based vision; high-speed visual acquisition; data-flow architecture; FPGA system; laser scanning

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Boluda, J.A.; Pardo, F.; Vegara, F. A Selective Change Driven System for High-Speed Motion Analysis. Sensors 2016, 16, 1875.

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