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Author: search.filters.author.Vongchumyen, CharoenStart date: 2025

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    Portable Signboard Size Measurement for Tax Collection
    (2026-01-01)
    Viriyakul, Vachara
    ;
    Noisundod, Siwakorn
    ;
    Chayawattana, Faikaew
    ;
    Chokkhun, Pacharapol
    ;
    Tienngam, Krittipoom
    Challenges in the collection of signboard taxes largely emanate from access-related problems and human errors, which contribute to inefficiencies in the tax valuation processes. However, a question of concern, which is normally overlooked, is how to provide a systematic and portable solution which combines precision and convenience for the field officers. This paper addresses this gap by developing a portable device based on computer vision and machine learning approaches to automate signboard measurement. Through the integration of state-of-the-art technologies, this device not only increases accuracy but also brings a level of operational simplicity that has not been explored before in this area. The results showed that the device was able to identify and calculate the area of the signboards correctly.
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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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    Frequency Choices and the Improvement of Signal Using Reassigned Joint Time-Frequency Analysis for Closed Range Detection
    (2025-01-01)
    Pinyatanabat, Thipparat
    ;
    Vongchumyen, Charoen
    This research aims to observe and improve the received signal resolution that reflected from moving object which, in this experiment, is pedestrian who would be moving around radar within close ranges (2 meters, 15 meters, and 30 meters apart from stationary monostatic radar). Since simulation is a better choice to observe the changes of signal with variety ranges of frequency with less uncontrollable variables thus MATLAB is the chosen tool to run on the experiment in order to observe the micro-doppler effect in each scenario. Considering real-life limitation, authors focus on off-the-shelf frequency range that everyone could access; 2.4 GHz and 5 GHz the frequency range of WIFI. The observation results show that if we want to decrease the frequency from 24 GHz to these household WIFI and still not decrease its information too much to unable to recognize human movement, 5 GHz is a better choice comparing to 2.4 GHz if the application aims to detect the minimum range of moving target indoor with resolution range is more or equal to 1 meter.