Full text: From pixels to sequences

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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 
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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 
 
	        
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