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Representing living architecture through skeleton reconstruction from point clouds

Living architecture, changing in structure with annual growth, requires precise, regular characterisation. However, its geometric irregularity and topological complexity make documentation using traditional methods difficult and presents challenges in creating useful models for mechanical and physio...

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Autores principales: Middleton, Wilfrid, Shu, Qiguan, Ludwig, Ferdinand
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8799686/
https://www.ncbi.nlm.nih.gov/pubmed/35091577
http://dx.doi.org/10.1038/s41598-022-05194-y
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author Middleton, Wilfrid
Shu, Qiguan
Ludwig, Ferdinand
author_facet Middleton, Wilfrid
Shu, Qiguan
Ludwig, Ferdinand
author_sort Middleton, Wilfrid
collection PubMed
description Living architecture, changing in structure with annual growth, requires precise, regular characterisation. However, its geometric irregularity and topological complexity make documentation using traditional methods difficult and presents challenges in creating useful models for mechanical and physiological analyses. Two kinds of living architecture are examined: historic living root bridges grown in Meghalaya, India, and contemporary ‘Baubotanik’ structures designed and grown in Germany. These structures exhibit common features, in particular network-like structures of varying complexity that result from inosculations between shoots or roots. As an answer to this modelling challenge, we present the first extensive documentation of living architecture using photogrammetry and a subsequent skeleton extraction workflow that solves two problems related to the anastomoses and varying nearby elements specific to living architecture. Photogrammetry was used as a low cost method, supplying detailed point clouds of the structures’ visible surfaces. A workflow based on voxel-thinning (using deletion templates and adjusted p-simplicity criteria) provides efficient, accurate skeletons. A volume reconstruction method is derived from the thinning process. The workflow is assessed on seven characteristics beneficial in representing living architecture in comparison with alternative skeleton extraction methods. The resulting models are ready for use in analytical tools, necessary for functional, responsible design.
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spelling pubmed-87996862022-02-01 Representing living architecture through skeleton reconstruction from point clouds Middleton, Wilfrid Shu, Qiguan Ludwig, Ferdinand Sci Rep Article Living architecture, changing in structure with annual growth, requires precise, regular characterisation. However, its geometric irregularity and topological complexity make documentation using traditional methods difficult and presents challenges in creating useful models for mechanical and physiological analyses. Two kinds of living architecture are examined: historic living root bridges grown in Meghalaya, India, and contemporary ‘Baubotanik’ structures designed and grown in Germany. These structures exhibit common features, in particular network-like structures of varying complexity that result from inosculations between shoots or roots. As an answer to this modelling challenge, we present the first extensive documentation of living architecture using photogrammetry and a subsequent skeleton extraction workflow that solves two problems related to the anastomoses and varying nearby elements specific to living architecture. Photogrammetry was used as a low cost method, supplying detailed point clouds of the structures’ visible surfaces. A workflow based on voxel-thinning (using deletion templates and adjusted p-simplicity criteria) provides efficient, accurate skeletons. A volume reconstruction method is derived from the thinning process. The workflow is assessed on seven characteristics beneficial in representing living architecture in comparison with alternative skeleton extraction methods. The resulting models are ready for use in analytical tools, necessary for functional, responsible design. Nature Publishing Group UK 2022-01-28 /pmc/articles/PMC8799686/ /pubmed/35091577 http://dx.doi.org/10.1038/s41598-022-05194-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Middleton, Wilfrid
Shu, Qiguan
Ludwig, Ferdinand
Representing living architecture through skeleton reconstruction from point clouds
title Representing living architecture through skeleton reconstruction from point clouds
title_full Representing living architecture through skeleton reconstruction from point clouds
title_fullStr Representing living architecture through skeleton reconstruction from point clouds
title_full_unstemmed Representing living architecture through skeleton reconstruction from point clouds
title_short Representing living architecture through skeleton reconstruction from point clouds
title_sort representing living architecture through skeleton reconstruction from point clouds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8799686/
https://www.ncbi.nlm.nih.gov/pubmed/35091577
http://dx.doi.org/10.1038/s41598-022-05194-y
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