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Applied Optics

Applied Optics


  • Vol. 37, Iss. 26 — Sep. 10, 1998
  • pp: 6234–6239

Estimation of the surface velocity of debris flow with computer-based spatial filtering

M. Shorif Uddin, Hiroyuki Inaba, Yasumasa Itakura, and Masao Kasahara  »View Author Affiliations

Applied Optics, Vol. 37, Issue 26, pp. 6234-6239 (1998)

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A computer-based spatial-filtering velocimeter to measure the surface velocity of natural debris flow is described. This is a simple and interesting technique implemented with a spatial filter constructed as a software program that processes the video image of debris flow instead of a hardware implementation. The surface velocity of the debris flow at the Mt. Yakedake Volcano, Japan, was estimated by this computer-based spatial-filtering method, and the results were compared with those obtained by a hardware-based spatial-filtering method. Computer-based spatial filtering has the important advantage of a capability for tuning the spatial-filter parameters to the target flow.

© 1998 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(280.2490) Remote sensing and sensors : Flow diagnostics
(280.7250) Remote sensing and sensors : Velocimetry

Original Manuscript: November 17, 1997
Revised Manuscript: April 28, 1998
Published: September 10, 1998

M. Shorif Uddin, Hiroyuki Inaba, Yasumasa Itakura, and Masao Kasahara, "Estimation of the surface velocity of debris flow with computer-based spatial filtering," Appl. Opt. 37, 6234-6239 (1998)

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