Publication de 4 numéros par an
ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336
Indexed in
DIGITAL IMAGE ANALYSIS FOR THE INCOHERENT MEDIUM DENSITY PIV
RÉSUMÉ
A new algorithm for the particle tracking velocimetry is proposed. The algorithm aims to accelerate the analysis of particle imaging velocimetry (PIV) pictures in which particles distribute densely and frequently overlap or touch each other. It is based on PTV algorithms, a modified velocity vector histogram method and the binary-image correlation method. The modified method is used to detect directions of tracers and then, the binary-image method determines displacements of tracers. The new algorithm is examined using simulated pictures during a development procedure and is then applied to actual pictures of moving particles. The processing time, although not shorter than that of the binary-image correlation is far less than that of the popular correlation analysis.