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http://dx.doi.org/10.7780/kjrs.2020.36.2.2.9

Extraction of Waterline Using Low Altitude Remote Sensing  

Jung, Dawoon (Department of Earth Environment system, Pusan National University)
Lee, Jong-Seok (Department of Earth Environment system, Pusan National University)
Baek, Ji-Yeon (Department of Earth Environment system, Pusan National University)
Jo, Young-Heon (Department of Earth Environment system, Pusan National University)
Publication Information
Korean Journal of Remote Sensing / v.36, no.2_2, 2020 , pp. 337-349 More about this Journal
Abstract
In this study, Helikite, Low Altitude Remote Sensing (LARS) platform, was used to acquire coastal images. In the obtained image, the land and water masses were divided using four types of region clustering algorithms, and then waterline was extracted using edge detection. Quantitative comparisons were not possible due to the lack of in-situ waterline data. But, based on the image of the infrared band where water masses and land are relatively clear, the waterlines extracted by each algorithm were compared. As a result, it was found that each algorithm differed significantly in the part where the distinction between water masses and land was ambiguous. This is considered to be a difference in the process of selecting the threshold value of the digital number that each algorithm uses to distinguish the regions. The extraction of waterlines through various algorithms is expected to be used in conjunction with a Low Altitude Remote Sensing system that can be continuously monitored in the future to explain the rapid changes in coastal shape through several years of long-term data from fixed areas.
Keywords
Helikite; Image processing; Waterline; Low Altitude Remote Sensing (LARS); Infrared image; Clustering algorithms; Edge detection;
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Times Cited By KSCI : 12  (Citation Analysis)
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