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On the use of the non-stationarity of the structural noise for defect visibility enhnacement in ultrasonic inspections

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dc.creator Izquierdo, M. A. G.
dc.creator Hernández, M. G.
dc.creator Molero Armenta, Miguel Ángel
dc.creator Anaya Velayos, José Javier
dc.date 2008-06-25T12:03:49Z
dc.date 2008-06-25T12:03:49Z
dc.date 2007-12
dc.date.accessioned 2017-01-31T01:50:05Z
dc.date.available 2017-01-31T01:50:05Z
dc.identifier XIX Congreso Internacional de Acústica (ICA2007)
dc.identifier http://hdl.handle.net/10261/5327
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5327
dc.description Ponencia presentada en el XIX Congreso Internacional de Acústica (ICA2007), Madrid, 2-7 Sep 2007.-- PACS: 43.60.Hj.
dc.description Structural noise is an important distortion source in ultrasonic images of highly dispersive materials. This noise can considerably mask the flaw signals and cannot be eliminated using standard techniques for noise cancelling like band-pass filtering or temporal averaging. Fortunately, this noise has several characteristics that may help an algorithm designer to develop methods that improve the defect visibility.
dc.description In the literature there exist many techniques for flaw visibility enhancement in the presence of structural noise. However, many of the proposed algorithms do not systematic exploit the above mentioned characteristics. In this work we analyze the structural noise from a point of view of an algorithm developer that seeks parameters that may help to eliminate the noise enhancing the defect visibility. Also, we present several algorithms examples that, using this information, dramatically improve the visibility of the flaw echoes.
dc.description The authors would like to thank the financial support of Spanish Ministry of Science and Education with project DHORAVE BIA2006-15188-C03-01. M. Molero is supported by the Programme Alban, the European Union programme of high level Scholarship for Latin America (E05D055458MX) and The Mexican National Council for Science and Technology Conacyt: (186384). M.G. Hernández is supported by a postdoctoral CSIC-I3P contract granted by the European Social Fund.
dc.description Peer reviewed
dc.format 441887 bytes
dc.format application/pdf
dc.language eng
dc.publisher Sociedad Española de Acústica
dc.relation ICA2007
dc.relation ULT-10-003-IP
dc.rights openAccess
dc.subject Ultrasonic imaging and detection
dc.subject Signal processing
dc.subject Structural noise
dc.subject Ultrasonic inspections
dc.subject Flaw visibility enhancement
dc.title On the use of the non-stationarity of the structural noise for defect visibility enhnacement in ultrasonic inspections
dc.type Comunicación de congreso

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