IMM technical report 17/97:

Estimation of fluid flow fields and their stagnation points

Rasmus Larsen

For a copy of this paper, either


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

For further information, please contact, Finn Kuno Christensen, IMM, Bldg. 321, DTU
Phone: (+45) 4588 1433. Fax: (+45) 4588 2673, E-mail: