Pore segmentation of cement-based materials from backscattered electron images

A technique to segment pores from a normal backscattered electron (BSE) image of cement-based materials is presented. The upper threshold grey level for porosity is determined from the inflection point of the cumulative brightness histogram of the BSE image. This represents a critical point where a...

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Bibliographic Details
Published in:Cement and concrete research 2006-06, Vol.36 (6), p.1083-1090
Main Authors: Wong, H.S., Head, M.K., Buenfeld, N.R.
Format: Article
Language:English
Subjects:
Applied sciences
Backscattered electron imaging
BRIGHTNESS
Buildings. Public works
CEMENTS
Concretes. Mortars. Grouts
ELECTRONS
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
Image analysis
Materials
MATERIALS SCIENCE
Measurements. Technique of testing
MICROSTRUCTURE
POROSITY
SCANNING ELECTRON MICROSCOPY
SEM
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Description
Summary:A technique to segment pores from a normal backscattered electron (BSE) image of cement-based materials is presented. The upper threshold grey level for porosity is determined from the inflection point of the cumulative brightness histogram of the BSE image. This represents a critical point where a small incremental grey value will cause a sudden increase in thresholded area, a condition termed as overflow. The proposed technique was found to be more consistent and reliable than existing methods. Significantly fewer images are required to achieve a satisfactory level of statistical confidence for quantifying porosity.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2005.10.006