Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

J. Pakleza

CNRS (FR)

Ostatnie publikacje
1.  Quenot G.M., Pakleza J., Kowalewski T.A., Particle Image Velocimetry with Optical Flow, Experiments in Fluids, ISSN: 0723-4864, DOI: 10.1007/s003480050222, Vol.25, No.3, pp.177-189, 1998

Streszczenie:
An optical Flow technique based on the use of Dynamic Programming has been applied to Particle Image Velocimetry thus yielding a significant increase in the accuracy and spatial resolution of the velocity field. Results are presented for calibrated synthetic sequences of images and for sequences of real images taken for a thermally driven flow of water with a freezing front. The accuracy remains better than 0.5 pixel/frame for tested two-image sequences and 0.2 pixel/frame for four-image sequences, even with a 10% added noise level and allowing 10% of particles of appear or disappear. A velocity vector is obtained for every pixel of the image.

Afiliacje autorów:
Quenot G.M. - CNRS (FR)
Pakleza J. - CNRS (FR)
Kowalewski T.A. - IPPT PAN

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