Affiliations: CLIPS-IMAG, B.P. 53, 38041 Grenoble Cedex 9,
France
Abstract: A Dynamic Programming based Optical Flow technique has been applied
to the Particle Image Velocimetry (PIV) problem. It has been used for the
extraction of dense velocity fields in a planar section of a fluid flow
illuminated by a thin laser light sheet. Two (in-plane) components of the
velocity vectors can be recovered using a single camera and all three
components can be recovered using two or three cameras. Quantitative
performance tests have been carried out on calibrated synthetic image sequences
from the PIV Standard Project of the Visualization Society of Japan (VSJ).
Results are presented for the 2D flow based sequences (STD01 to STD08 Standard
Images) and the 3D flow based sequences (STD301, STD302, STD331 and STD337
Standard Images). The RMS error is within the 2-3% range and within the 4-8%
range for recovery of the two-component and the three-component velocity
vectors respectively.