학술논문
A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry
Document Type
research-article
Author
Ty N. F. Roach, author; Shreya Yadav, author; Carlo Caruso, author; Jenna Dilworth, author; Catherine M. Foley, author; Joshua R. Hancock, author; Joel Huckeba, author; Ariana S. Huffmyer, author; Kira Hughes, author; Valerie A. Kahkejian, author; Elizabeth M.P. Madin, author; Shayle B. Matsuda, author; Michael McWilliam, author; Spencer Miller, author; Erika P. Santoro, author; Mariana Rocha de Souza, author; Damaris Torres-Pullizaa, author; Crawford Drury, author; Joshua S. Madin, author
Source
Journal of Visualized Experiments. (170)
Subject
Language
English
ISSN
1940-087X
Abstract
Structure-from-motion (SfM) photogrammetry is a technique used to generate three-dimensional (3D) reconstructions from a sequence of two-dimensional (2D) images. SfM methods are becoming increasingly popular as a noninvasive way to monitor many systems, including anthropogenic and natural landscapes, geologic structures, and both terrestrial and aquatic ecosystems. Here, a detailed protocol is provided for collecting SfM imagery to generate 3D models of benthic habitats. Additionally, the cost, time efficiency, and output quality of employing a Digital Single Lens Reflex (DSLR) camera versus a less expensive action camera have been compared. A tradeoff between computational time and resolution was observed, with the DSLR camera producing models with more than twice the resolution, but taking approximately 1.4-times longer to produce than the action camera. This primer aims to provide a thorough description of the steps necessary to collect SfM data in benthic habitats for those who are unfamiliar with the technique as well as for those already using similar methods.