Petcher, P. A. and Dixon, S. (2011) A modified Hough transform for removal of direct and reflected surface waves from B-scans. NDT & E International, Vol.44 (No.2). pp. 139-144. doi:10.1016/j.ndteint.2010.11.004 ISSN 0963-8695.

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Abstract

Time of flight diffraction (ToFD) B-scans may contain horizontal lines from surface waves propagating directly from emitter to receiver and angled lines after a reflection off a surface edge. A Hough transform (HT) can detect lines but assumes lines at less than 45° from the vertical consist of a series of connected vertical segments (“thick” lines). In a B-scan image, narrow (temporally sharp) lines at less than 45° from the vertical become “sparse” such that there are gaps in the times of arrival between scan positions. This paper describes a modified HT, used to successfully identify and remove such lines from B-scans.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Hough functions, Time-of-flight mass spectrometry, Image processing, Surface waves
Journal or Publication Title:	NDT & E International
Publisher:	Elsevier Sci Ltd.
ISSN:	0963-8695
Official Date:	March 2011
Dates:	Date Event March 2011 Published
Volume:	Vol.44
Number:	No.2
Page Range:	pp. 139-144
DOI:	10.1016/j.ndteint.2010.11.004
Status:	Peer Reviewed
Publication Status:	Published

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