Ploß P, Rupitsch S, Fröhlich T, Lerch R (2012)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2012
Publisher: Elsevier BV
Book Volume: 47
Pages Range: 216-219
DOI: 10.1016/j.proeng.2012.09.122
Ultrasound-based flow measurement relies on the proper knowledge of the angle under which the acoustic waves propagate with respect to the flow direction of the streaming fluid. We present a novel image processing approach for the identification of the wavefronts' orientation by exploiting a modified Hough transform. The spatially discretized sound pressure amplitude of measurement/simulation data is utilized as a weighting function for the Hough transform. It is shown that the angle and position of a wavefront can be estimated with subpixel accuracy, where the size of a pixel depends on the data's spatial resolution. This is achieved by incorporating a least-squares algorithm, fitting a 2D Gaussian function to the Hough parameter plane and thus improving the accuracy of the detected wavefront properties. (C) 2012 Elsevier Ltd....Selection and/or peer-review under responsibility of the Symposium Cracoviense Sp. z.o.o.
APA:
Ploß, P., Rupitsch, S., Fröhlich, T., & Lerch, R. (2012). Identification of Acoustic Wave Orientation for Ultrasound-Based Flow Measurement by Exploiting the Hough Transform. (pp. 216-219). Elsevier BV.
MLA:
Ploß, Peter, et al. "Identification of Acoustic Wave Orientation for Ultrasound-Based Flow Measurement by Exploiting the Hough Transform." Elsevier BV, 2012. 216-219.
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