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Author: search.filters.author.Vongchumyen, CharoenSubject: search.filters.subject.Image processing

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    Laser Pigeon Deterrent
    (2026-01-01)
    Viriyakul, Vachara
    ;
    Chumsri, Paramee
    ;
    Chayawattana, Faikaew
    ;
    Sattapornnara, Peerapat
    ;
    Vongchumyen, Charoen
    Urban environments face increasing challenges due to pigeon infestations, leading to property damage, environmental degradation, and health concerns. This research presents the development of a laser-based pigeon deterrent system that leverages image processing, embedded systems, and web applications to provide an automated and efficient bird deterrence solution. The system detects pigeons and humans in real time, ensuring that laser deterrence is applied safely and ethically. Through controlled field tests, the system achieved a pigeon detection accuracy of 78.18% and a successful deterrence rate of 49.09%. The results indicate the potential of laser-based deterrents as a viable alternative to conventional bird control methods.
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    Empirical experiment on origin destination estimation using automatic licence plate matching on a rural road of Thailand
    (2017-10-19)
    Watanachaturaporn, Pakorn
    ;
    Chalermwongphan, Karn
    ;
    Huntajidkul, Achaya
    ;
    Vongchumyen, Charoen
    ;
    Watthanakul, Jettarin
    The growth of economic influences city authorities to plan and build infrastructure. The growth prediction mostly uses modern mathematical models. The accuracy of the model is highly depended on reliable parameters. Two crucial parameters for most models are traffic capacity and average travel speed along road networks and obtained from an origin-destination (OD) estimation. Thus, an OD estimation is necessary to obtain reliable parameters for the predictive models. Traditionally, the OD estimation is performed by human observation; however, an automatic license plate recognition and matching algorithm show potential of obtaining such data. Additionally, the observation is able to perform long term observation which is impractical for human. Therefore, this paper reports an empirical experiment on OD estimation using automatic license plate matching along with a real-world human observation survey in Mukdahan province. The results from both types of surveys are reported and compared. The different results between the both raises an opportunity for researching an optimal method of OD estimation in Thailand.