6533b828fe1ef96bd12879f1
RESEARCH PRODUCT
A Selective Change Driven System for High-Speed Motion Analysis.
Fernando PardoFrancisco VegaraJose Antonio Boludasubject
Data streamMotion analysisLaser scanningComputer scienceReal-time computing02 engineering and technologylcsh:Chemical technology01 natural sciencesBiochemistryArticleAnalytical ChemistryInformàtica0202 electrical engineering electronic engineering information engineeringlcsh:TP1-1185data-flow architectureElectrical and Electronic EngineeringImage sensorhigh-speed visual acquisitionField-programmable gate arrayInstrumentationDataflow architecturePixellaser scanning020208 electrical & electronic engineering010401 analytical chemistryFrame (networking)Arquitectura d'ordinadorsAtomic and Molecular Physics and Optics0104 chemical sciencesCMOS image sensor; event-based vision; high-speed visual acquisition; data-flow architecture; FPGA system; laser scanningCMOS image sensorevent-based visionFPGA systemdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-11-08 | Sensors (Basel, Switzerland) |