Data Interpolation Beyond Aliasing

dc.contributor.author Volker, Arno
dc.contributor.author Neer, Paul
dc.date 2018-02-17T22:33:29.000
dc.date.accessioned 2020-06-30T06:53:50Z
dc.date.available 2020-06-30T06:53:50Z
dc.date.issued 2016-01-01
dc.description.abstract <p>Proper spatial sampling is critical for many applications. If the sampling criterion is not met, artifacts appear for example in images. Last year an iterative approach was presented using wave field extrapolation to interpolate spatially aliased signals. This main concept behind this approach is that after inverse wave field extrapolation the signal is concentrated in a small region with a high amplitude, while the aliasing artifacts are spread-out through the domain. Inverse wave field extrapolation focusses optimally at one depth, making the performance of the reconstruction depth dependent. Obviously the method can be repeated for several depths. This year we show an alternative approach using an imaging/inverse-imaging approach. The demonstration of this approach is extended to 2D-arrays where the sampling limitations are even more critical. Moreover we show in this paper that the interpolation approach is not limited to near-field data, but can also be used on far-field data (plane waves). The Radon transform can be used for plane waves to focus the data. The approach is demonstrated using modeled and measured data for linear and 2D arrays.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/2016/abstracts/270/
dc.identifier.articleid 4883
dc.identifier.contextkey 9228254
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/2016/abstracts/270
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/62028
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/2016/abstracts/270/088_Data_Interpolation.pdf|||Fri Jan 14 23:06:13 UTC 2022
dc.subject.disciplines Mathematics
dc.subject.disciplines Signal Processing
dc.subject.disciplines Statistics and Probability
dc.title Data Interpolation Beyond Aliasing
dc.type event
dc.type.genre event
dspace.entity.type Publication
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