STUDY ON NON-CONTACT WAVE MEASUREMENT BASED ON SHAPE-FROM-SHADING METHOD

Luan Xuetao; Li Zhengnong; Yu Hao; Deng Qinli; Wu Honghua

doi:10.19912/j.0254-0096.tynxb.2024-0934

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 13-22. DOI: 10.19912/j.0254-0096.tynxb.2024-0934

STUDY ON NON-CONTACT WAVE MEASUREMENT BASED ON SHAPE-FROM-SHADING METHOD

Luan Xuetao¹, Li Zhengnong¹, Yu Hao¹, Deng Qinli², Wu Honghua¹

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Abstract

To achieve a simple and low-cost real-time measurement of sea waves, this article proposes a non-contact wave parameter measurement method based on shape-from-shading （SFS）. Initially, a single camera is used to capture images of the wave tank and floating reference objects. Then, the three-dimensional shapes of the wave surface and reference objects are reconstructed using the SFS method. A size transformation coefficient is introduced into the 3D reconstruction results to accurately calculate wave parameters. The proposed method's wave parameter measurements are compared with actual measurements. Results indicate that the relative errors for average wave height and wavelength are less than 5%, the relative error for the average period is less than 1%, and the deviation in wave direction is within 5°. This method demonstrates high stability and accuracy.

Key words

wave power / wavelength / 3D reconstruction / shape-from-shading / size transformation coefficient / image processing / optical measurement

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Luan Xuetao, Li Zhengnong, Yu Hao, Deng Qinli, Wu Honghua. STUDY ON NON-CONTACT WAVE MEASUREMENT BASED ON SHAPE-FROM-SHADING METHOD[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 13-22 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0934

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