3D reconstruction and quantification of macropores using X-ray computed tomography and image analysis

Pierret, A, Capowiez, Y, Belzunces, L and Moran, CJ (2002) 3D reconstruction and quantification of macropores using X-ray computed tomography and image analysis. Geoderma, 106 3-4: 247-271. doi:10.1016/S0016-7061(01)00127-6

Author Pierret, A
Capowiez, Y
Belzunces, L
Moran, CJ
Title 3D reconstruction and quantification of macropores using X-ray computed tomography and image analysis
Journal name Geoderma   Check publisher's open access policy
ISSN 0016-7061
Publication date 2002-01-01
Sub-type Article (original research)
DOI 10.1016/S0016-7061(01)00127-6
Open Access Status
Volume 106
Issue 3-4
Start page 247
End page 271
Total pages 25
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract Axial X-ray Computed tomography (CT) scanning provides a convenient means of recording the three-dimensional form of soil structure. The technique has been used for nearly two decades, but initial development has concentrated on qualitative description of images. More recently, increasing effort has been put into quantifying the geometry and topology of macropores likely to contribute to preferential now in soils. Here we describe a novel technique for tracing connected macropores in the CT scans. After object extraction, three-dimensional mathematical morphological filters are applied to quantify the reconstructed structure. These filters consist of sequences of so-called erosions and/or dilations of a 32-face structuring element to describe object distances and volumes of influence. The tracing and quantification methodologies were tested on a set of undisturbed soil cores collected in a Swiss pre-alpine meadow, where a new earthworm species (Aporrectodea nocturna) was accidentally introduced. Given the reduced number of samples analysed in this study, the results presented only illustrate the potential of the method to reconstruct and quantify macropores. Our results suggest that the introduction of the new species induced very limited chance to the soil structured for example, no difference in total macropore length or mean diameter was observed. However. in the zone colonised by, the new species. individual macropores tended to have a longer average length. be more vertical and be further apart at some depth. Overall, the approach proved well suited to the analysis of the three-dimensional architecture of macropores. It provides a framework for the analysis of complex structures, which are less satisfactorily observed and described using 2D imaging. (C) 2002 Elsevier Science B.V. All rights reserved.
Keyword Agriculture, Soil Science
Earthworm Burrow Systems
Computer-assisted Tomography
Mathematical Morphology
Network Reconstruction
Network Visualisation
3-component Digital Images
Soil Pore Structure
Pre-alpine Meadow
Soil Science
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Sustainable Minerals Institute Publications
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Citation counts: TR Web of Science Citation Count  Cited 138 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 146 times in Scopus Article | Citations
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Created: Mon, 13 Aug 2007, 22:55:57 EST