High-contrast pixels: a new feature for defect detection in X-ray testing
Abstract:The detection of defects in X-ray testing follows a pattern recognition scheme where feature extraction plays a very significant role. In this paper, we present a new feature based on the number of high-contrast pixels located inside a segmented potential defect related to the size of the potential defect. The developed feature can be easily computed and offers a high separability according to the Fischer linear discriminant. The feature depends on only two parameters that can be automatically determined in a training phase. The developed feature and other reported features are tested in 72 radioscopic images of aluminium wheels. The comparison shows that the separability of the developed feature is at least six times higher than the separability achieved by other features.
Document Type: Research Article
Affiliations: Domingo Mery is with the Departamento de Ciencia de la Computacin, Pontificia Universidad Catlica de Chile, Avda. Vicua Mackena 4860 (143), Santiago, Chile. ; , http://w3.org/1999/xlink, Email: email@example.com, URL: http://www.ing.puc.cl/dmery
Publication date: December 1, 2006
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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