Abstract
A hybrid method for particle image velocimetry (PIV) is developed to overcome the limitations of the optical flow method applied to PIV images with large displacements. The main elements of the hybrid method include a cross-correlation scheme for initial estimation, a shifting scheme for generating a shifted image, and an optical flow scheme for obtaining a refined high-resolution velocity field. In addition, a preprocessing scheme is used for correcting the illumination intensity change. The accuracy of the hybrid method is evaluated through simulations in a parametric space in comparison with the typical correlation methods and optical flow method. Further quantitative comparisons are made in PIV measurements in a circular air jet.
Issue Section:
Technical Brief
References
1.
Raffel
,
M.
,
Willert
,
C.
,
Wereley
,
S.
, and
Kompenhans
,
J.
, 2007
, Particle Image Velocimetry
,
Springer
,
Berlin
.2.
Adrian
,
R. J.
, and
Westerweed
,
J.
, 2011
, Particle Image Velocimetry
,
Cambridge University Press
,
Cambridge, UK
.3.
Stanislas
,
M.
,
Okamoto
,
K.
, and
Khler
,
C.
, 2003
, “
Main Results of the First International PIV Challenge
,” Meas. Sci. Technol.
,
14
(10
), pp. R63
–R89
.10.1088/0957-0233/14/10/2014.
Stanislas
,
M.
,
Okamoto
,
K.
,
Kähler
,
C.
, and
Westerweel
,
J.
, 2005
, “
Main Results of the Second International PIV Challenge
,” Exp. Fluids
,
39
(2
), pp. 170
–191
.10.1007/s00348-005-0951-25.
Stanislas
,
M.
,
Okamoto
,
K.
,
Kähler
,
C.
,
Westerweel
,
J.
, and
Scarano
,
F.
, 2008
, “
Main Results of the Third International PIV Challenge
,” Exp. Fluids
,
45
(1
), pp. 27
–71
.10.1007/s00348-008-0462-z6.
Liu
,
T.
, and
Shen
,
L.
, 2008
, “
Fluid Flow and Optical Flow
,” J. Fluid Mech.
,
614
pp. 253
–291
.10.1017/S00221120080032737.
Heitz
,
D.
,
Memin
,
E.
, and
Schnorr
,
C.
, 2010
, “
Variational Fluid Flow Measurements From Image Sequences: Synopsis and Perspectives
,” Exp. Fluids
,
48
(3
), pp. 369
–393
.10.1007/s00348-009-0778-38.
Quenot
,
G. M.
,
Pakleza
,
J.
, and
Kowalewski
,
T. A.
, 1998
, “
Particle Image Velocimetry With Optical Flow
,” Exp. Fluids
,
25
pp. 177
–189
.10.1007/s0034800502229.
Ruhnau
,
P.
,
Kohlberger
,
T.
,
Schnörr
,
C.
, and
Nobach
,
H.
, 2005
, “
Variational Optical Flow Estimation for Particle Image Velocimetry
,” Exp. Fluids
,
38
(1
), pp. 21
–32
.10.1007/s00348-004-0880-510.
Yuan
,
J.
,
Schnorr
,
C.
, and
Memin
,
E.
, 2007
, “
Discrete Orthogonal Decomposition and Variational Fluid Flow Estimation
,” J. Math. Imaging Vision
,
28
(1
), pp. 67
–80
.10.1007/s10851-007-0014-911.
Corpetti
,
T.
,
Memin
,
E.
, and
Perez
,
P.
, 2002
, “
Dense Estimation of Fluid Flows
,” IEEE Trans. Pattern Anal. Mach. Intell.
,
24
(3
), pp. 365
–380
.10.1109/34.99013712.
Corpetti
,
T.
,
Heitz
,
D.
,
Arroyo
,
G.
,
Mémin
,
E.
, and
Santa-Cruz
,
A.
, 2006
, “
Fluid Experimental Flow Estimation Based on an Optical Flow Scheme
,” Exp. Fluids
,
40
(1
), pp. 80
–97
.10.1007/s00348-005-0048-y13.
Liu
,
T.
,
Merat
,
A.
,
Makhmalbaf
,
M. H. M.
,
Fajardo
,
C.
, and
Merati
,
P.
, 2015
, “
Comparison Between Optical Flow and Cross-Correlation Methods for Extraction of Velocity Fields From Particle Images
,” Exp. Fluids
,
56
, pp. 166
–189
.10.1007/s00348-015-2036-114.
Liu
,
T.
, 2017
, “
OpenOpticalFlow: An Open Source Program for Extraction of Velocity Fields From Flow Visualization Images
,” J. Open Res. Software
,
5
, p. e29
.10.5334/jors.16815.
Yang
,
Z.
, and
Johnson
,
M.
, 2017
, “
Hybrid Particle Image Velocimetry With the Combination of Cross-Correlation and Optical Flow Method
,” J. Visualization
,
20
(3
), pp. 625
–638
.10.1007/s12650-017-0417-716.
Vejražka
,
J.
, 2019
, private communication.17.
Thielicke
,
W.
, and
Stamhuis
,
E. J.
, 2014
, “
PIVlab—Towards User-Friendly, Affordable and Accurate Digital Particle Image Velocimetry in MATLAB
,” J. Open Res. Software
,
2
(1
), p. e30
.10.5334/jors.bl18.
Horn
,
B. K.
, and
Schunck
,
B. G.
, 1981
, “
Determining Optical Flow
,” Artif. Intell.
,
17
(1–3
), pp. 185
–204
.10.1016/0004-3702(81)90024-219.
Wang
,
B.
,
Cai
,
Z.
,
Shen
,
L.
, and
Liu
,
T.
, 2015
, “
An Analysis of Physics-Based Optical Flow Method
,” J. Comp. Appl. Math.
,
276
, pp. 62
–80
.10.1016/j.cam.2014.08.020Copyright © 2020 by ASME
You do not currently have access to this content.
