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STUDY OF METHOD FOR DETECTING OCCURANCE OF RIP CURRENT USING IMAGE ANALYSIS
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- SHIMADA Ryo
- 中央大学理工学研究科都市人間環境学専攻
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- ISHIKAWA Toshinori
- 中央大学研究開発機構
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- SAWAGASHIRA Ryosuke
- 中央大学理工学研究科都市人間環境学専攻
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- KOMINE Tsutomu
- 中央大学理工学部人間総合理工学科
Bibliographic Information
- Other Title
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- 画像解析を用いた離岸流発生有無の自動判別手法の検討
Description
<p> In this study, we investigated a method for detecting the occurrence of unsteady rip currents using image averaging from images taken by a web camera installed on the Wakasa-wada coast. As a result of comparison between the judgment of the occurrence of rip currents by this method and that of three experienced lifesavers, the accuracy rate was 99.4% in the analysis using the test data, and 56.9% in the validation data. It was found the accuracy decreased under the following conditions: early morning (7 to 8 a.m.), evening (16 pm or after), cloudy and rainy. On the other hand, for wave heights of 0.5 m or greater in the validation data, the accuracy was 75 %. Therefore, it was found that this method has a certain level of accuracy in detecting the occurrence of rip currents at wave heights of 0.5 m or greater.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 78 (2), I_229-I_234, 2022
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390856738296561792
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- ISSN
- 21854688
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed