Analysis of surface circulation with digital camera

Zheng Wen Zheng, Kun Cheng Hsieh, Chung Ru Ho, Chun Yi Lin, Nan Jung Kuo

    研究成果: 書貢獻/報告類型會議貢獻

    摘要

    The purpose of this study is to verify the feasibility of feature tracking method on the images taken by a digital camera near the coastal area. This technology is applied to the surface circulation at Yin-Yang Bay, a small bay at northeastern Taiwan, with an obvious front of cloudy yellow fresh water and clear brine. The primary images taken at Yin-Yang Bay have to do geometric transformation, image smoothing and edge detection before work on feature tracking. Two feature tracking methods are applied to these processed images for estimating surface current velocity. They are the subjective method of estimating distance among the sequence images by naked eyes and the objective method of Maximum Cross Correlation (MCC), respectively. The results show that the velocities of surface currents at Yin-Yang Bay derived from both methods are similar and are comparable to the results of in-situ measurements with a difference of 2%. This indicates that the technology developed in this study is suitable for coastal circulation research. However, it is noted that not every front velocity can reflect the behavior of tidal current. Nevertheless, the front velocity during neap tide is apparently slower than that during spring tide.

    原文英語
    主出版物標題29th Asian Conference on Remote Sensing 2008, ACRS 2008
    頁面1503-1508
    頁數6
    出版狀態已發佈 - 2008 十二月 1
    事件29th Asian Conference on Remote Sensing 2008, ACRS 2008 - Colombo, 斯里兰卡
    持續時間: 2008 十一月 102008 十一月 14

    出版系列

    名字29th Asian Conference on Remote Sensing 2008, ACRS 2008
    3

    其他

    其他29th Asian Conference on Remote Sensing 2008, ACRS 2008
    國家斯里兰卡
    城市Colombo
    期間08/11/1008/11/14

    ASJC Scopus subject areas

    • Computer Networks and Communications

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