Three-Dimensional Measurement of Underwater Objects in a Rectangular Vessel by Using Bi-Path Stereoscopy

Abstract

It is important to measure shape of objects in a transparent vessel for 3D digital preservation of underwater creatures. We propose a measurement method using a bi-path stereoscopic image of the objects acquired with a monocular camera via rectangular vessel planes. The method estimates the posture of rectangular planes based on bundle adjustment considering light refraction, and measures the 3D shape of underwater objects using ray tracing. Experimental results demonstrated the effectiveness of the proposed method.