Browsing by Author "Barnard, A."

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    Factors that influence the geometric detection pattern of vehicle-based licence plate recognition camera systems
    (Southern African Transport Conference, 2018-07) Rademeyer, M. C.; Booysen, M. J.; Barnard, A.
    Licence plate recognition (LPR) systems are used to automatically extract the characters from licence plates positioned in front of a camera. The geometric detection pattern is the region within which the system can accurately recognise licence plates and is of special interest when the system is mounted in a moving vehicle. In this research, the theory surrounding camera optics was investigated and used as the basis of a software simulation model. Inspired by the simulation measurements, a real-world experimental test was conducted to further explore the influence various factors have on the geometric detection pattern. Analysis of these measurements provided greater insight how multiple factors individually contribute to the shape and size of the geometric detection pattern and serves as a guide in the design of vehicle-based LPR systems.
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    Remotely controllable wireless road stud network
    (IEEE -- Institute of Electrical and Electronics Engineers, 2013-10) Le Roux, J. H.; Barnard, A.; Booysen, Marthinus J.
    Developing countries face many infrastructure related challenges, one of them being road safety. This paper proposes a novel system introducing a network of wirelessly connected road studs that are remotely controllable from an online platform. In this proof-of-concept demonstrator, a smallscale set-up was designed and constructed to assist in the analysis of the requirements for such a system, which will form part of a greater ITS system. The system consists of three functional parts, namely the online SMART platform which is used to transmit commands to the road studs in the field via a GSM connection; the coordinator unit, which receives the commands through a GSM modem from the platform and then transmits the relevant data to the road studs through an IEEE 802.15.4 based wireless network; the road stud units, which receives commands from the coordinator and reconfigures its settings in terms of colour, brightness and flashing frequency accordingly. In this paper we review the design process and highlight some key results from the constructed model.