An Algorithm for Image-Based Measurement of Ocean Wave Field
Current approaches to measure wave fields have low efficiency and high maintenance costs;thus,a reliable and efficient measurement method for wide-area wave fields is urgently required.An image-based method for measuring wave field around fixed maritime structures has been proposed,where the depth of each pixel is separated into the depth of the mean water surface and the depth variation induced by wave elevation,which can be measured through camera position and image information,thereby reconstructing the 3D wave field by pixel depth.The results calculated by this method are compared with the time history and wave spectrum of binocular depth estimation algorithm and wave gauge,the average relative errors of the spectral peak period and significant wave height are 0.92％and-2.22％,respectively,which proves the feasibility and effectiveness of the method.
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