基于视频的潮汐入口表面流估计

IF 0.7 4区工程技术 Q4 ENGINEERING, OCEAN

Marine Technology Society Journal Pub Date : 2023-09-27 DOI:10.4031/mtsj.57.3.4

Benjamin Middour, George Voulgaris, Douglas Cahl

{"title":"基于视频的潮汐入口表面流估计","authors":"Benjamin Middour, George Voulgaris, Douglas Cahl","doi":"10.4031/mtsj.57.3.4","DOIUrl":null,"url":null,"abstract":"Abstract Oceanic surface currents are estimated from analysis of short duration video obtained by a nadir facing camera installed on a bridge over a tidal inlet. Data analyzed consisted of 13 two-minute video clips captured approximately every 40 min over a period of 8 hr, covering a significant portion of the tidal cycle. Surface current speed and direction estimates are obtained from each collected video using (i) a method originally developed for analysis of imagery from drones (CopterCurrents) and (ii) a particle tracking method. The horizontal (u, v) surface current velocity components and total horizontal velocity magnitude, obtained from the two methods, were in very good agreement with each other ( R 2 = .96 and Root Mean Square (RMS) differences of 0.12 m/s or less). Our analysis suggests that video cameras from stationary structures can provide surface flow measurements over inland waters and navigational channels where deployment of in-situ sensors is not feasible.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Video Based Estimation of Surface Currents in a Tidal Inlet\",\"authors\":\"Benjamin Middour, George Voulgaris, Douglas Cahl\",\"doi\":\"10.4031/mtsj.57.3.4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Oceanic surface currents are estimated from analysis of short duration video obtained by a nadir facing camera installed on a bridge over a tidal inlet. Data analyzed consisted of 13 two-minute video clips captured approximately every 40 min over a period of 8 hr, covering a significant portion of the tidal cycle. Surface current speed and direction estimates are obtained from each collected video using (i) a method originally developed for analysis of imagery from drones (CopterCurrents) and (ii) a particle tracking method. The horizontal (u, v) surface current velocity components and total horizontal velocity magnitude, obtained from the two methods, were in very good agreement with each other ( R 2 = .96 and Root Mean Square (RMS) differences of 0.12 m/s or less). Our analysis suggests that video cameras from stationary structures can provide surface flow measurements over inland waters and navigational channels where deployment of in-situ sensors is not feasible.\",\"PeriodicalId\":49878,\"journal\":{\"name\":\"Marine Technology Society Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2023-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Marine Technology Society Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4031/mtsj.57.3.4\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, OCEAN\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Marine Technology Society Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4031/mtsj.57.3.4","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, OCEAN","Score":null,"Total":0}

引用次数: 0

摘要

摘要通过对安装在潮汐入口桥上的面向谷底的摄像机拍摄的短时间视频进行分析，估计了海洋表面流。分析的数据包括13个两分钟的视频片段，在8小时的时间内大约每40分钟拍摄一次，涵盖了潮汐周期的很大一部分。表面电流速度和方向估计是从每个收集的视频中获得的，使用(i)最初开发的用于分析无人机图像的方法(CopterCurrents)和(ii)粒子跟踪方法。两种方法得到的水平(u, v)表面电流速度分量和总水平速度大小具有很好的一致性(r2 = 0.96，均方根(RMS)差值小于0.12 m/s)。我们的分析表明，固定结构上的摄像机可以提供内陆水域和航道上的表面流量测量，在这些地方部署原位传感器是不可行的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Video Based Estimation of Surface Currents in a Tidal Inlet

Abstract Oceanic surface currents are estimated from analysis of short duration video obtained by a nadir facing camera installed on a bridge over a tidal inlet. Data analyzed consisted of 13 two-minute video clips captured approximately every 40 min over a period of 8 hr, covering a significant portion of the tidal cycle. Surface current speed and direction estimates are obtained from each collected video using (i) a method originally developed for analysis of imagery from drones (CopterCurrents) and (ii) a particle tracking method. The horizontal (u, v) surface current velocity components and total horizontal velocity magnitude, obtained from the two methods, were in very good agreement with each other ( R 2 = .96 and Root Mean Square (RMS) differences of 0.12 m/s or less). Our analysis suggests that video cameras from stationary structures can provide surface flow measurements over inland waters and navigational channels where deployment of in-situ sensors is not feasible.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Marine Technology Society Journal 工程技术-工程：大洋

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： The Marine Technology Society Journal is the flagship publication of the Marine Technology Society. It publishes the highest caliber, peer-reviewed papers, six times a year, on subjects of interest to the society: marine technology, ocean science, marine policy, and education.