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Sensors 2016, 16(11), 1875; doi:10.3390/s16111875

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
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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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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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