3D Soil Images Structure Quantification using Relative Entropy

Tarquis Alfonso, Ana Maria and López-Gonzalez-Nieto, Pilar and Bird, N.R.A. (2011). 3D Soil Images Structure Quantification using Relative Entropy. In: "8th EGU General Assembly, EGU 2011", 03/04/2011 - 08/04/2011, Viena, Austria. p. 14058.

Description

Title: 3D Soil Images Structure Quantification using Relative Entropy
Author/s:
  • Tarquis Alfonso, Ana Maria
  • López-Gonzalez-Nieto, Pilar
  • Bird, N.R.A.
Item Type: Presentation at Congress or Conference (Other)
Event Title: 8th EGU General Assembly, EGU 2011
Event Dates: 03/04/2011 - 08/04/2011
Event Location: Viena, Austria
Title of Book: Geophysical Research Abstracts of 8th EGU General Assembly
Date: 2011
Volume: 14
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Soil voids manifest the cumulative effect of local pedogenic processes and ultimately influence soil behavior - especially as it pertains to aeration and hydrophysical properties. Because of the relatively weak attenuation of X-rays by air, compared with liquids or solids, non-disruptive CT scanning has become a very attractive tool for generating three-dimensional imagery of soil voids. One of the main steps involved in this analysis is the thresholding required to transform the original (greyscale) images into the type of binary representation (e.g., pores in white, solids in black) needed for fractal analysis or simulation with Lattice?Boltzmann models (Baveye et al., 2010). The objective of the current work is to apply an innovative approach to quantifying soil voids and pore networks in original X-ray CT imagery using Relative Entropy (Bird et al., 2006; Tarquis et al., 2008). These will be illustrated using typical imagery representing contrasting soil structures. Particular attention will be given to the need to consider the full 3D context of the CT imagery, as well as scaling issues, in the application and interpretation of this index.

More information

Item ID: 13427
DC Identifier: http://oa.upm.es/13427/
OAI Identifier: oai:oa.upm.es:13427
Official URL: http://www.geophysical-research-abstracts.net
Deposited by: Memoria Investigacion
Deposited on: 23 Oct 2012 10:14
Last Modified: 21 Apr 2016 12:44
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