TY  - JOUR
PB  - SPIE
SN  - 10179909
Y1  - 2017///
VL  - 26
A1  - Hittawe, M.M.
A1  - Sidibé, D.
A1  - Beya, O.
A1  - Mériaudeau, F.
JF  - Journal of Electronic Imaging
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034832135&doi=10.1117%2f1.JEI.26.6.063015&partnerID=40&md5=54912d6752d27c8ad165f93ab3debf0b
AV  - none
ID  - scholars8180
TI  - Machine vision for timber grading singularities detection and applications
KW  - Classification (of information); Cracks; Defects; Feature extraction; Forestry; Learning systems; Timber; Wood
KW  -  Automated methods; Bag of words; Depth ratio; Image computation; Juvenile woods; Mechanical behavior; Mechanical requirements; Singularities detection
KW  -  Computer vision
N2  - This article deals with machine vision techniques applied to timber grading singularities. Timber used for architectural purposes must satisfy certain mechanical requirements, and, therefore, must be mechanically graded to ensure the manufacturer that the product complies with the requirements. However, the timber material has many singularities, such as knots, cracks, and presence of juvenile wood, which influence its mechanical behavior. Thus, identifying those singularities is of great importance. We address the problem of timber defects segmentation and classification and propose a method to detect timber defects such as cracks and knots using a bag-of-words approach. Extensive experimental results show that the proposed methods are efficient and can improve grading machines performances. We also propose an automated method for the detection of transverse knots, which allows the computation of knot depth ratio (KDR) images. Finally, we propose a method for the detection of juvenile wood regions based on tree rings detection and the estimation of the tree's pith. The experimental results show that the proposed methods achieve excellent results for knots detection, with a recall of 0.94 and 0.95 on two datasets, as well as for KDR image computation and juvenile timber detection. © 2017 SPIE and IS&T.
IS  - 6
N1  - cited By 3
ER  -