Methods | Image Density | Number of frames | Dimensions | principles | Remarks |
Direct cross-correlation method (Adrian, R. J. (1991) [1] ) | High | 2 | 2 | Maximum value of cross-correlation coefficient | Widely used in all the PIV, heavy computation |
Minimum quadratic difference (Gui, L. C. and Merzkirch, W. (1996) [5] ) | High | 1, 2 | 2 | Minimum quadratic difference | Fair computation, good tracking property |
Absolute gray level difference (Kaga, A., Inoue, Y. and Yamaguchi, K. (1994) [6] ) | High | 2 | 2 | Minimum summation of absolute value of brightness difference | Fast computation, fair tracking property |
Auto-correlation method (Adrian, R. J. (1991) [1] ) | High | 1 | 1 | Maximum value of cross-correlation coefficient | Direction ambiguity |
BICC (Yamamoto, F., Wada, A., Iguchi, M. and Ishikawa, M. (1996) [7] ) | Medium, Low | 2, 3 | 2, 3 | Maximum value of binary image cross-correlation | Widely used, good tracking, fast computation, the occurrence of some erroneous vectors |
DT-PTV (Song, X., Yamamoto, F., Iguchi, M. and Murai, Y. (1999) [8] ) | Medium, Low | 2 | 2, 3 | Pattern tracked by Delaunay Triangles | Good tracking, fast computation, removing erroneous vectors automatically, fit for rotational flow, easier rearrangement |
VGT (Ishikawa, M. et al. (2000) [9] ) | Medium, Low | 2 | 2, 3 | Pattern tracked by velocity tensor | Good tracking, fast computation, fit for rotational and shear flow, the occurrence of some erroneous vectors |
Spring model (Okamoto, K., Hassan, Y. A. and Schmidl, W. D. (1995) [10] ) | Medium, Low | 2 | 2, 3 | Pattern tracked by constructed spring net | Good tracking, fast computation, fit for rotational and shear flow, the occurrence of some erroneous vectors |
4-frame PTV (Nishino, K., Kasagi, N. and Hirata, M. (1989) [11] ) | Low | 4 | 2, 3 | Particles move along smooth curves | Fair tracking heavy computation, low paired rate, less erroneous vectors |
VVH/2-PTV (Baek, S. J. and Lee, S. J. (1996) [12] ) | Low | 2 | 2 | Particles in the same search domain move approximately at the velocity | Fair tracking, many erroneous vectors |