Segmentation of cracks in X-ray CT images of tested macroporous plaster specimens

Precise segmentation of cracks is essential to characterize the structural properties of a rock specimen under compressive force. A two-dimensional internal cross-sectional image of rock can be created using X-ray computed tomography (CT scanning). Cracks in rocks usually have very poor local contra...

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Bibliographic Details
Published inIEEE SOUTHEASTCON 2014 pp. 1 - 8
Main Authors Bhowmik, Ujjal Kumar, Mandala, Divya, Hudyma, Nick W., Kreidl, O. Patrick, Harris, Alan
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2014
Subjects
Computed tomography
Edge detection
Image coding
Image segmentation
Kernel
local entropy thresholding
matched filtering
Matched filters
mathematical morphology
Noise
Robustness
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Summary:Precise segmentation of cracks is essential to characterize the structural properties of a rock specimen under compressive force. A two-dimensional internal cross-sectional image of rock can be created using X-ray computed tomography (CT scanning). Cracks in rocks usually have very poor local contrast which makes it difficult to detect and segment cracks from the background using existing popular edge detection algorithms. In this paper, we propose a two-dimensional matched filtering technique followed by local entropy based thresholding, morphological operators and length filtering to detect and segment cracks from the cross-sectional images of rock. The proposed algorithm is tested on several macroporous plaster specimens. Experimental results demonstrate the effectiveness and robustness of the algorithm compared to hand-labeled ground truth segmentations.
ISSN:1091-0050
1558-058X
DOI:10.1109/SECON.2014.6950688