IMM technical report 17/97:
Estimation of fluid flow fields and their stagnation points
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Abstract
Given a temporal sequence of images of fluids we will
use local polynomials to regularise observations of normal flows into
smooth flow fields.
This technique furthermore allows us to give a qualitative local description
of the flow field and to estimate the position of stagnation points.
The algorithm is applied to two data sets. First a series of Meteosat
images are processed with the purpose of estimating cloud motion. Secondly,
the airflow in livestock buildings is estimated using the technique on
images recorded of smoke patterns illuminated by a laser sheet. Here the
purpose is the evaluation of the ventilation system.
Keywords: optical flow, stagnation points, linear phase model, ventilation
IMM publications list
Last modified October 9, 1997
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