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Proceedings Paper

Standing tree decay detection by using acoustic tomography images
Author(s): Luis F. Espinosa ; Andres F. Arciniegas; Flavio A. Prieto; Yolima Cortes; Loïc Brancheriau
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Paper Abstract

The acoustic tomographic technique is used in the diagnosis process of standing trees. This paper presents a segmentation methodology to separate defective regions in cross-section tomographic images obtained with Arbotom® device. A set of experiments was proposed using two trunk samples obtained from a eucalyptus tree, simulating defects by drilling holes with known geometry, size and position and using different number of sensors. Also, tomographic images from trees presenting real defects were studied, by testing two different species with significant internal decay. Tomographic images and photographs from the trunk cross-section were processed to align the propagation velocity data with a corresponding region, healthy or defective. The segmentation was performed by finding a velocity threshold value to separate the defective region; a logistic regression model was fitted to obtain the value that maximizes a performance criterion, being selected the geometric mean. Accuracy segmentation values increased as the number of sensors augmented; also the position influenced the result, obtaining improved results in the case of centric defects.

Paper Details

Date Published: 30 April 2015
PDF: 6 pages
Proc. SPIE 9534, Twelfth International Conference on Quality Control by Artificial Vision 2015, 953404 (30 April 2015); doi: 10.1117/12.2182915
Show Author Affiliations
Luis F. Espinosa , Univ. Nacional de Colombia (Colombia)
Andres F. Arciniegas, Lab. de Mécanique et d'Acoustique, CNRS (France)
Flavio A. Prieto, Univ. Nacional de Colombia (Colombia)
Yolima Cortes, Secretaria Distrital de Ambiente (Colombia)
Loïc Brancheriau, CIRAD, AMAP (France)

Published in SPIE Proceedings Vol. 9534:
Twelfth International Conference on Quality Control by Artificial Vision 2015
Fabrice Meriaudeau; Olivier Aubreton, Editor(s)

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