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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

3D Classification of Cold-Water Coral Reefs: A Comparison of Classification Techniques for 3D Reconstructions of Cold-Water Coral Reefs and Seabed

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de Oliveira, Larissa Macedo Cruz [1] ; Lim, Aaron [1, 2] ; Conti, Luis A. [3] ; Wheeler, Andrew J. [1, 4]
Total Authors: 4
[1] Univ Coll Cork, Environm Res Inst, Sch Biol Earth & Environm Sci, Cork - Ireland
[2] Green Rebel Marine Crosshaven Boatyard, Crosshaven - Ireland
[3] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo - Brazil
[4] Univ Coll Cork, Marine & Renewable Energy Inst, Irish Ctr Res Appl Geosci, Cork - Ireland
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 0

Cold-water coral (CWC) reefs are complex structural habitats that are considered biodiversity ?hotspots? in deep-sea environments and are subject to several climate and anthropogenic threats. As three-dimensional structural habitats, there is a need for robust and accessible technologies to enable more accurate reef assessments. Photogrammetry derived from remotely operated vehicle video data is an effective and non-destructive method that creates high-resolution reconstructions of CWC habitats. Here, three classification workflows {[}Multiscale Geometrical Classification (MGC), Colour and Geometrical Classification (CGC) and Object-Based Image Classification(OBIA)] are presented and applied to photogrammetric reconstructions of CWC habitats in the Porcupine Bank Canyon, NE Atlantic. In total, six point clouds, orthomosaics, and digital elevation models, generated from structure-from-motion photogrammetry, are used to evaluate each classification workflow. Our results show that 3D Multiscale Geometrical Classification outperforms the Colour and Geometrical Classification method. However, each method has advantages for specific applications pertinent to the wider marine scientific community. Results suggest that advancing from commonly employed 2D image analysis techniques to 3D photogrammetric classification methods is advantageous and provides a more realistic representation of CWC habitat composition. (AU)

FAPESP's process: 17/19649-8 - Mapping, modelling and monitoring key processes and controls on cold-water coral habitats in submarine canyons (MMMonKey_Pro)
Grantee:Luis Americo Conti
Support type: Scholarships abroad - Research