Wave runup video motion detection using the Radon Transform
Wave runup video motion detection using the Radon Transform
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DOI：
10.1016/j.coastaleng.2017.09.015
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发表时间：
2017-12-01
影响因子：
4.4
通讯作者：
Catalan, Patricio A.
中科院分区：
文献类型：
--
作者：
Almar, Rafael;Blenkinsopp, Chris;Catalan, Patricio A.
介绍了一种基于视频图像的运行检测新方法，并在能量耗散海滩上进行了验证。利用Radon变换（RT）检测上冲和反冲的瞬时水线。将该方法与RGB图像和激光雷达测量的传统颜色对比方法进行了比较。在我们的观察中，即使在不利条件下，RT也显示出更好的检测技巧，例如在对比度降低的平坦耗散冲积区。因为RT是更深水线（类似于0.1 m）的代表，它对由于砂饱和度而缺乏对比度不太敏感。此外，由于它是基于运动检测，它对光照条件的变化不太敏感。总的来说，RT为长期自动检测运行提供了一个有吸引力的替代方案。
A new method of runup detection from video imagery is introduced and validated at an energetic dissipative beach. The instantaneous waterline is detected from uprush and backwash by using the Radon Transform (RT). The method is compared to conventional color contrast method from RGB images and LiDAR measurements. In our observations, the RT shows better detection skill even for adverse conditions, such as those present on flat dissipative swash zones where contrast is reduced. Because the RT is a proxy of deeper waterline (similar to 0.1 m) it is less sensitive to lack of contrast due to sand saturation. Moreover, since it is based on motion detection, it is less sensitive to changes in lighting conditions. Overall, the RT offers an attractive alternative for long term automated detection of the runup.