ins in
each
used
pon-
right
tca-
de-
ine.
ata
ces
en-
can
35
207
7 SUMMARY AND CONCLUSIONS
À high performance PTV algorithm for the measurement of turbulent flow fields has been developed. Using tra-
jectories to solve the stereo correspondence is the key to a high performance algorithm, which works fast and
with high particel densities (> 2000 corresponding Particles). Tests on simulated sequences certified the reli-
ability of the stereo correspondence algorithms. The simulations showed that the limitations are in the particle
tracking. Further study will focus on this point.
8 REFERENCES
dames AA 1000 Reconstruction of a 3-dimensional flow-field from orthogonal views of seed track video
images, Experiments in Fluids, 6, pp. 380 - 386
Horn, B.K.P., 1986. Robot Vision, MIT Press, Cambridge
Hering, F., 1995. A robust technique for tracking particles over long image sequences, Proc. ISPRS Intercomis-
sion Workshop "From Pixels to Sequences", IAPRS, Vol. 30, Part 5W1
ane B, 1985. Transfer processes acrcoss the air-water interface, Habilitationsschrift, University of Hei-
elberg
Jähne, B.,1993. Digital Image Processing, Springer, Heidelberg
Lenz, R., 1987. Linsenfehlerkorrigierte Eichung von Halbleiterkameras mit Standardobjektiven für hochgenaue
3D-Messungen in Echtzeit. Proc. 9. DAGM-Symp. Mustererkennung 1987. Informatik-Fachberichte 149, pp.
212-216. Springer, Berlin
Maas, H.G., 1992. Digitale Photogrammetrie in der dreidimensionalen StrómungsmeBtechnik, Dissertation, ETH
Zurich, Institute of Geodesy and Photogrammetry, Mitteilungen No.50
Netzsch, T., 1992. Dreidimensionale Messung turbulenter Strómung mit Bildverarbeitung, Proc. 14. DAGM
Symp. Mustererkennung 1992. Informatik aktuell, pp. 150-157, Springer, Berlin
Posch, S., 1990. Automatische Tiefenbestimmung aus Grauwertstereobildern, Dt. Univ. Verlag, Wiesbaden
Tsai, R., 1986. An efficient and accurate camera calibration technique for 3D machine vision, Proc. Computer
Vision and Pattern Recognition, pp. 364-374, IEEE, Miami Beach
Wierzimok, D.,1990. Messung turbulenter Strómungen unterhalb der wind-wellenbewegten Wasseroberflàche
mittels Bildfolgenanalyse, Dissertation, University of Heidelberg, Institute of Environmental Physics
Wierzimok, D., 1892. Tracking in Strémungsbildfolgen, Proc. 14. DAGM Symp. Mustererkennung 1992, Informa-
tik aktuell, pp. 158-165, Berlin: Springer
IAPRS, Vol. 30, Part 5W1, ISPRS Intercommission Workshop "From Pixels to Sequences", Zurich, March 22-24 1995