Surface Reconstruction of Ancient Water Storage Systems - An Approach for Sparse 3D Sonar Scans and Fused Stereo Images
Year: 2014
Type: conference-paper
Abstract: This work presents a process pipeline that addresses the problem of reconstructing surfaces of underwater \nstructures from stereo images and sonar scans collected with a micro-ROV on the islands of Malta and Gozo. \nUsing a limited sensor load, sonar and small GoPro Hero2 cameras, the micro-ROV is able to explore water \nsystems and gather data. As a preprocess to the reconstruction pipeline, a 3D evidence grid is created by \nmosaicing horizontal and vertical sonar scans. A volumetric representation is then constructed using a level \nset method. Fine-scale details from the scene are captured in stereo cameras, and are transformed into point \nclouds and projected into the volume. A raycasting technique is used to trim the volume in accordance with \nthe projected point clouds, thus reintroducing fine details to the rough sonar-generated model. The resulting \nvolume is surfaced, yielding a final mesh which can be viewed and interacted with for archaeological and \neducational purposes. Initial results from both steps of the reconstruction pipeline are presented and discussed.
Authors: Erik A. Nelson, Ian T. Dunn, Jeffrey Forrester, Timothy Gambin, Christopher M. Clark, Zoë Wood
Language: English
Subfield: Geology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W1902148301