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Author: search.filters.author.Koseeyaporn, JeerasudaSubject: search.filters.subject.component

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    Distance Detection Technique Using Enhancing Inverse Perspective Mapping
    (2018-09-11)
    Wongsaree, Preaw
    ;
    Sinchai, Sakkarin
    ;
    Wardkein, Paramote
    ;
    Koseeyaporn, Jeerasuda
    This paper presents a distance determination technique using an image from the single forward camera. Since too dark or too bright of the image and non-linear relation between height of the object and distance from the camera have effect on the performance of the detection process. Therefore, automatic brightness adjustment and inverse perspective mapping (IMP) is applied in the proposed scheme. In addition, region of interest (ROI) determination is used to decrease the processing time. The experimental results confirm that the proposed technique can detect distance of the object in front of the car where the error is 7.96%.
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    Frequency Estimation of Short Range Radar Using Adaptive FIR Notch Filter and SAGC for Velocity Detection
    (2018-09-11)
    Chinakaew, Pannipa
    ;
    Sinchai, Sakkarin
    ;
    Wardkein, Paramote
    ;
    Koseeyaporn, Jeerasuda
    This research proposes the velocity detection for short range radar using an adaptive FIR notch filter and a sinusoidal automatic gain control scheme (SAGC). A HB 100 module with amplifying gain of 20 times produces Doppler signal and this signal is fed to a laptop through a sound card with sampling frequency of 8000 Hertz. The signal is processed by the SAGC to amplify the amplitude of the signal to be unity. To detect the frequency of the signal, an algorithm of indirect frequency estimation based on adaptive FIR notch filter is performed. After that, the resulting frequency is converted to velocity. All procedures in this work are processed by MATLAB program. The results of the proposed method have better signal to noise ratio compared with existing method. In addition, the presented work consumes low computational time.