A Landmark-Free Method for Three-Dimensional Shape Analysis.

The tools and techniques used in morphometrics have always aimed to transform the physical shape of an object into a concise set of numerical data for mathematical analysis. The advent of landmark-based morphometrics opened new avenues of research, but these methods are not without drawbacks. The ti...

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Main Authors: Benjamin J Pomidor, Jana Makedonska, Dennis E Slice
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2016-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4783062?pdf=render
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spelling doaj-830da7ae0baa4ac5aafdb1408b5db9ee2020-11-25T01:42:15ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01113e015036810.1371/journal.pone.0150368A Landmark-Free Method for Three-Dimensional Shape Analysis.Benjamin J PomidorJana MakedonskaDennis E SliceThe tools and techniques used in morphometrics have always aimed to transform the physical shape of an object into a concise set of numerical data for mathematical analysis. The advent of landmark-based morphometrics opened new avenues of research, but these methods are not without drawbacks. The time investment required of trained individuals to accurately landmark a data set is significant, and the reliance on readily-identifiable physical features can hamper research efforts. This is especially true of those investigating smooth or featureless surfaces.In this paper, we present a new method to perform this transformation for data obtained from high-resolution scanning technology. This method uses surface scans, instead of landmarks, to calculate a shape difference metric analogous to Procrustes distance and perform superimposition. This is accomplished by building upon and extending the Iterative Closest Point algorithm. We also explore some new ways this data can be used; for example, we can calculate an averaged surface directly and visualize point-wise shape information over this surface. Finally, we briefly demonstrate this method on a set of primate skulls and compare the results of the new methodology with traditional geometric morphometric analysis.http://europepmc.org/articles/PMC4783062?pdf=render
collection DOAJ
language English
format Article
sources DOAJ
author Benjamin J Pomidor
Jana Makedonska
Dennis E Slice
spellingShingle Benjamin J Pomidor
Jana Makedonska
Dennis E Slice
A Landmark-Free Method for Three-Dimensional Shape Analysis.
PLoS ONE
author_facet Benjamin J Pomidor
Jana Makedonska
Dennis E Slice
author_sort Benjamin J Pomidor
title A Landmark-Free Method for Three-Dimensional Shape Analysis.
title_short A Landmark-Free Method for Three-Dimensional Shape Analysis.
title_full A Landmark-Free Method for Three-Dimensional Shape Analysis.
title_fullStr A Landmark-Free Method for Three-Dimensional Shape Analysis.
title_full_unstemmed A Landmark-Free Method for Three-Dimensional Shape Analysis.
title_sort landmark-free method for three-dimensional shape analysis.
publisher Public Library of Science (PLoS)
series PLoS ONE
issn 1932-6203
publishDate 2016-01-01
description The tools and techniques used in morphometrics have always aimed to transform the physical shape of an object into a concise set of numerical data for mathematical analysis. The advent of landmark-based morphometrics opened new avenues of research, but these methods are not without drawbacks. The time investment required of trained individuals to accurately landmark a data set is significant, and the reliance on readily-identifiable physical features can hamper research efforts. This is especially true of those investigating smooth or featureless surfaces.In this paper, we present a new method to perform this transformation for data obtained from high-resolution scanning technology. This method uses surface scans, instead of landmarks, to calculate a shape difference metric analogous to Procrustes distance and perform superimposition. This is accomplished by building upon and extending the Iterative Closest Point algorithm. We also explore some new ways this data can be used; for example, we can calculate an averaged surface directly and visualize point-wise shape information over this surface. Finally, we briefly demonstrate this method on a set of primate skulls and compare the results of the new methodology with traditional geometric morphometric analysis.
url http://europepmc.org/articles/PMC4783062?pdf=render
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