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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5325Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.creator | Pardo, Emilia | - |
| dc.creator | San Emeterio, José Luis | - |
| dc.creator | Rodríguez, Miguel A. | - |
| dc.creator | Ramos, Antonio | - |
| dc.date | 2008-06-25T11:48:07Z | - |
| dc.date | 2008-06-25T11:48:07Z | - |
| dc.date | 2007-12 | - |
| dc.date.accessioned | 2017-01-31T01:49:54Z | - |
| dc.date.available | 2017-01-31T01:49:54Z | - |
| dc.identifier | XIX Congreso Internacional de Acústica (ICA2007) | - |
| dc.identifier | http://hdl.handle.net/10261/5325 | - |
| dc.identifier.uri | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5325 | - |
| dc.description | Ponencia presentada en el XIX Congreso Internacional de Acústica (ICA2007), Madrid, 2-7 Sep 2007.-- PACS: 43.60.Hj. | - |
| dc.description | Wavelet processing has become a popular and well-established technique that offers good results and great flexibility for noise reduction. The basic wavelet de-noising scheme consists of a thresholding of the Discrete Wavelet Transform (DWT) coefficients. Nevertheless, some improvements over this basic non-linear scheme can be obtained by the use of Undecimated Wavelet Transforms (UWT), also known as redundant, shift-invariant or stationary wavelet transforms, because they provide redundant and translation invariant representations. The introduction of redundancy produces less efficient signal representations but it can be useful in de-noising. Ultrasonic traces are frequently contaminated with structural or grain noise, which can not be removed by classical time averaging or band-pass filtering. An analysis of wavelet de-noising of some individual traces is presented. In addition, a significant number of synthetic ultrasonic signals are also processed for a statistical study and comparison of UWT and DWT de-noising in terms of the signal-to-noise ratio of the resulting traces. | - |
| dc.description | This work has been supported by the Spanish MEC, R&D Project CICYT Ref. DPI2005-00124 of the I+D National Plan and grant FPI BES-2004-5296. | - |
| dc.description | Peer reviewed | - |
| dc.format | 95147 bytes | - |
| dc.format | application/pdf | - |
| dc.language | eng | - |
| dc.publisher | Sociedad Española de Acústica | - |
| dc.relation | ICA2007 | - |
| dc.relation | ULT-10-005-IP | - |
| dc.rights | openAccess | - |
| dc.subject | Ultrasonic imaging and detection | - |
| dc.subject | Signal processing | - |
| dc.subject | Noise reduction | - |
| dc.subject | Wavelet processing | - |
| dc.subject | Discrete Wavelet Transform (DWT) | - |
| dc.subject | Undecimated Wavelet Transform (UWT) | - |
| dc.subject | Grain noise | - |
| dc.subject | Ultrasonic traces | - |
| dc.title | Shift invariant wavelet processing of ultrasonic traces | - |
| dc.type | Comunicación de congreso | - |
| Appears in Collections: | Digital Csic | |
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