Journal article
Modeling of ultrasound speckle with application in flaw detection in metals
IEEE transactions on signal processing, v 40(3), pp 624-632
01 Mar 1992
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The problem of analyzing and modeling the speckle that occurs in coherent acoustic imagery is discussed. A complex RF acoustic speckle field is approximated by a circularly symmetric complex Gaussian Markov random field (GMRF) which has a rational power spectral density. The use of a GMRF field model results in a substantial reduction in the representation and analysis complexity of the backscatter image. It appears to capture the speckle structure well, is consistent with the first-order marginal statistics of the complex or RF amplitude speckle, and explains the homogeneous coarseness appearance of the speckle in terms of a homogeneous colored random field with a definite correlation structure. This is of great consequence in target recognition problems, where the target structure is a priori unknown, highly variable, and no meaningful and simple model can represent its manifestation in the image. (C.A.B.)
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Details
- Title
- Modeling of ultrasound speckle with application in flaw detection in metals
- Creators
- FERNANDS Cohen - Drexel University
- Publication Details
- IEEE transactions on signal processing, v 40(3), pp 624-632
- Publisher
- The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:A1992HF01600013
- Scopus ID
- 2-s2.0-0026825970
- Other Identifier
- 991019173889104721
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- Web of Science research areas
- Engineering, Electrical & Electronic