Operational Use of Surfcam Online Streaming Images for Coastal Morphodynamic Studies
Operational Use of Surfcam Online Streaming Images for Coastal Morphodynamic Studies
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Surfcam 在线流媒体图像在海岸形态动力学研究中的实际应用
DOI：
10.3390/rs11010078
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. Taborda
中科院分区：
文献类型：
--
作者：
U. Andriolo;E. Sánchez;R. Taborda
沿海视频监测已被证明是研究沿海过程的一种宝贵的岸基遥感技术，因为它提供了对沿海地区进行高频、连续和自主观测的可能性。然而，视频系统基础设施的安装需要经济和技术上的努力，沿着的是常常受到后勤约束的限制。本研究提出了利用“surfcam”网络流媒体图像进行定量科学研究的方法。两种不同的方法来收集所需的地面控制点（GCPs），无论是在现场工作和使用网络工具免费提供，以建立一个严格的几何连接之间的陆地和图像空间。图像投影仪工具的应用程序允许的未知相机参数的估计，需要地理校正的在线流图像。三个摄影测量程序示出，不同的计算步骤的设计和可用于解决空间后方交会系统的GCPs的数量。结果表明，该方法的可行性，以产生准确的纠正平面图像，最好的水平投影精度为1.3米兼容的海岸过程的定量分析所需的。所提出的方法可以把“surfcam”的基础设施和任何在线流海滩凸轮，到完全远程岸基观测系统，促进使用这些免费提供的图像的近岸形态动力学的研究。
Coastal video monitoring has been proven to be a valuable shore-based remote-sensing technique to study coastal processes, as it offers the possibility of high-frequency, continuous and autonomous observations of the coastal area. However, the installation of a video systems infrastructure requires economical and technical efforts, along with being often limited by logistical constraints. This study presents methodological approaches to exploit “surfcam” internet streamed images for quantitative scientific studies. Two different methodologies to collect the required ground control points (GCPs), both during fieldwork and using web tools freely available are presented, in order to establish a rigorous geometric connection between terrestrial and image spaces. The application of an image projector tool allowed the estimation of the unknown camera parameters necessary to georectify the online streamed images. Three photogrammetric procedures are shown, distinct both in the design of the computational steps and in number of GCPs available to solve the spatial resection system. Results showed the feasibility of the methodologies to generate accurate rectified planar images, with the best horizontal projection accuracy of 1.3 m compatible with that required for a quantitative analysis of coastal processes. The presented methodologies can turn “surfcam” infrastructures and any online streaming beach cam, into fully remote shore-based observational systems, fostering the use of these freely available images for the study of nearshore morphodynamics.
来自德国瓦登海叙尔特岛摄像机观测的海岸线形态动力学的时空尺度
影响因子：
2.1
作者：
Blossier;Winter
通讯作者：
Winter
影响因子：
4.4
作者：
Almar, Rafael;Blenkinsopp, Chris;Catalan, Patricio A.
通讯作者：
Catalan, Patricio A.