New Signal Processing Scheme for the Analysis of Electromagnetic Images

dc.contributor.author Nath, Shridhar
dc.contributor.author Udpa, Satish
dc.date 2018-02-14T04:47:49.000
dc.date.accessioned 2020-06-30T06:35:50Z
dc.date.available 2020-06-30T06:35:50Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 1989
dc.date.issued 1989
dc.description.abstract <p>Electromagnetic methods of nondestructive testing find widespread application in industry. A vast majority of the defect characterization schemes using electromagnetic methods involve estimation of the size and/or shape of the defect on the basis of a one dimensional signal obtained by scanning the surface of the test specimen using a suitable transducer [1–3]. Recent years have witnessed increasing interest in the development of imaging techniques for characterizing defects. As an example, eddy current imaging methods involve a raster scan of the surface of the test specimen to obtain a two dimensional image whose elements represent the real or imaginary components or alternatively the magnitude or phase of the impedance of the eddy current probe [4,5]. In the case of magnetostatic imaging methods, the specimen under test is scanned by a flux sensitive transducer such as a Hall probe. The image is obtained, typically, by treating the value of either the normal or tangential component of the flux density at each sample point as a gray level [6]. Inverse techniques proposed to date rely largely on phenomenological models for analyzing the images to obtain estimates of the size and shape of the defect [7–10]. Unfortunately, these techniques call for considerable computing resources.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1989/allcontent/96/
dc.identifier.articleid 1972
dc.identifier.contextkey 5783949
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1989/allcontent/96
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/59470
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1989/allcontent/96/1989_Nath_NewSignal.pdf|||Sat Jan 15 02:35:05 UTC 2022
dc.source.uri 10.1007/978-1-4613-0817-1_96
dc.subject.disciplines Signal Processing
dc.title New Signal Processing Scheme for the Analysis of Electromagnetic Images
dc.type event
dc.type.genre article
dspace.entity.type Publication
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