Adaptive computer-based spatial-filtering method for more accurate estimation of the surface velocity of debris flow.
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.
Uddin
M S
MS
Department of Electronics and Information Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan.
Inaba
H
H
Itakura
Y
Y
Yoshida
Y
Y
Kasahara
M
M