Nearshore bathymetry estimation using UAV
Nearshore bathymetry estimation using UAV
复制标题
使用无人机进行近岸测深估算
DOI：
10.1080/21664250.2018.1436239
复制
发表时间：
2018
影响因子：
2.4
通讯作者：
Yoshinao Matsuba and Shinji Sato
中科院分区：
文献类型：
--
作者：
Naohiro Hattori;Shinji Sato & Yusuke Yamanaka;Yoshinao Matsuba and Shinji Sato
为实现近岸海域高分辨率、高灵活性的水深测量，研制了一种基于无人机的近岸海域水深测量系统。该系统是基于反估计的水深从波峰线的速度提取的视频图像由无人机悬停在150米的高度捕获。对单向波采用亮度的跨岸分布提取波峰线，对多向波采用二维小波变换提取波峰线。只有长周期波浪的数据被用来确保水深估计的准确性。该系统的有效性得到了证实，在三个海滩具有不同的特点：四戈屋海滩与多个砂坝，有明海滩与水下结构，和浅叶海滩与砂绕过。
An unmanned aerial vehicle (UAV)-based system is developed to flexibly survey nearshore bathymetry with high resolutions in both time and space. The system is based on the inverse estimation of water depth from the speed of wave crest lines extracted from video images captured by a UAV hovered at a height of 150 m. The extraction of wave crest lines was achieved by cross-shore distribution of the brightness for unidirectional waves while two-dimensional wavelet transform was applied for multidirectional waves. Only the data for long-period waves were used to ensure the accuracy of bathymetry estimation. The validity of the system was confirmed at three beaches with different characteristics: Yotsugoya beach with multiple sand bars, Ariake beach with submerged structures, and Asaba beach with sand bypassing.