| 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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