THE APPLICATION OF VIDEO IMAGE PROCESSING TO THE STUDY OF NEARSHORE PROCESSES
THE APPLICATION OF VIDEO IMAGE PROCESSING TO THE STUDY OF NEARSHORE PROCESSES
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DOI：
10.5670/oceanog.1993.02
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发表时间：
1993
期刊：
影响因子：
2.8
通讯作者：
R. Holman;A. Sallenger;T. Lippmann;J. Haines
中科院分区：
文献类型：
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作者：
R. Holman;A. Sallenger;T. Lippmann;J. Haines
你好。. .对公众来说，最受欢迎的海洋环境可能是海滩和近岸环境。从早期历史开始，诗歌就描述了潮汐、海浪和沙子的起伏。最近，经济，娱乐和国防的压力，导致大大增加了努力，以实现更定量的了解。在自然条件下进行物理测量的能力是理解近岸动力学进展的关键。这已经通过流体运动的固定点测量阵列和海滩响应的调查来完成。尽管成本高昂，后勤困难，但由此产生的见解是无价的。呢在某些方面，这些数据集只提供了自然海滩系统可变性的一瞥。本文将探讨一种替代方法，在近岸采样，利用可见的性质，流体运动和间接的海滩的反应。在过去的十年中，低成本的视频硬件和能够从视频图像中提取有价值的数据的图像处理系统的可用性为研究近岸提供了有价值的工具。在下面的部分中，我们描述了近岸的一般物理和由此产生的采样约束。然后，我们讨论视频图像处理的基本要素。最后，我们说明了几个例子，可以在低成本和长时间使用这些视频技术的流体和测深测量。
h o u r s . . . PERHAPS THE MOST POPULAR oceanographic setting for the public is the beach and nearshore environment. Poetic accounts since early history describe the comings and goings of tides, waves and sand. More recently economic, recreational and defense pressures have lead to greatly increased efforts to achieve a more quantitative understanding. Critical to progress in understanding nearshore dynamics has been the abi l i ty to make physical measurements under natural conditions. This has t rad i t iona l ly been accompl i shed with arrays of f ixed-point measurements of fluid mot ions and surveys of beach response. Although costly and logistically difficult, the resulting insight has been invaluable . Yet. in some ways, these data sets have provided only a glimpse of the variability of a natural beach system. This paper will explore an alternative approach to sampling in the nearshore, taking advantage of the visible nature of the fluid motions and, indirect ly , of the beach response . Over the past decade, the avai labi l i ty of low-cos t video hardware and of image processing systems capable of extract ing valuable data from video images has provided a valuable tool for s tudying the nearshore, In the fol lowing section, we descr ibe the general physics of the nearshore and the resulting sampling constraints. We then discuss the basic elements of video image processing. Finally, we illustrate several examples of fluid and bathymetry measurements that can be made at low cost and over long periods of t ime using these video techniques.