Lab experiment for photo bathymetry : Simultaneous reconstruction of water surface and bottom with a synchronised camera rig

Abstract

In photo bathymetry, the refraction of the optical rays at the air-water interface, according to Snell’s law, causes image blurring and topographic reconstruction errors. Modelling the dynamic, wave-induced water surface can correct this refraction, enhancing bathymetric accuracy. This study presents a technical approach for simul-taneously capturing and reconstructing both the water surface and bottom using a synchronised camera rig. Various acquisition configurations were tested to assess the possibility to extract water surface information. The design, acquisition plan, insights and initial results of this feasibility study are discussed, along with suggestions for future improvements and outlooks.