title: Adaptive computer-based spatial-filtering method for more accurate estimation of the surface velocity of debris flow.
abstract: An adaptive computer-based spatial-filtering velocimeter to measure the surface velocity of a natural debris flow with high accuracy is described that can adjust the filter parameters, specifically, the slit width of the filter, based on the surface-pattern characteristics of the flow. A computer simulation confirms the effectiveness of this technique. The surface velocity of a natural debris flow at the Mt. Yakedake Volcano, Japan, was estimated by this adaptive method, and the results were compared with those obtained by two other methods: hardware-based spatial filtering and normal computer-based spatial filtering.
authors.affiliation: Department of Electronics and Information Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan.
authors.forename: M S
authors.initials: MS
authors.lastname: Uddin
authors.forename: H
authors.initials: H
authors.lastname: Inaba
authors.forename: Y
authors.initials: Y
authors.lastname: Itakura
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.forename: M
authors.initials: M
authors.lastname: Kasahara