Abstract

Speckle-pattern subtraction methods are used for the detection of moving objects embedded in scattering media. Results show that the ability to detect small nonstationary objects is greatly enhanced.

© 1995 Optical Society of America

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K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

1987 (1)

1986 (2)

1985 (1)

1981 (1)

T. Asakura, N. Takai, Appl. Phys. 25, 179 (1981).
[CrossRef]

1971 (1)

Abramson, N.

K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

Aizu, Y.

Alfano, R. R.

Asakura, T.

Bjelkhagen, H.

K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

Chen, H.

Chen, Y.

De Silversti, S.

Dilworth, D.

Duguay, M. A.

Fercher, A. F.

A. F. Fercher, M. Peukert, E. Roth, Opt. Eng. 25, 731 (1986).

Fujii, H.

Fujimoto, J. G.

Hebden, J. C.

Ikawa, H.

Ippen, E. P.

Kruger, R. A.

Leith, E.

Lopez, J.

Margolis, R.

Mattick, A. T.

Nohira, K.

Ogino, K.

Ohura, T.

Oseroff, A.

Peukert, M.

A. F. Fercher, M. Peukert, E. Roth, Opt. Eng. 25, 731 (1986).

Pomarico, J. A.

N. A. Russo, J. A. Pomarico, E. E. Sicre, Opt. Commun. 90, 227 (1992).
[CrossRef]

Roth, E.

A. F. Fercher, M. Peukert, E. Roth, Opt. Eng. 25, 731 (1986).

Russo, N. A.

N. A. Russo, J. A. Pomarico, E. E. Sicre, Opt. Commun. 90, 227 (1992).
[CrossRef]

Serafin, J.

K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

Shimtomi, Y.

Sicre, E. E.

N. A. Russo, J. A. Pomarico, E. E. Sicre, Opt. Commun. 90, 227 (1992).
[CrossRef]

Spears, K. G.

K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

Sugita, T.

Takai, N.

Valdmanis, J.

Wong, K. S.

Yamamoto, T.

Yamamoto, Y.

Yoo, K. M.

Zhu, X.

K. G. Spears, J. Serafin, N. Abramson, X. Zhu, H. Bjelkhagen, IEEE Trans. Biomed. Eng. 36, 1210 (1989).
[CrossRef] [PubMed]

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Figures (5)

Fig. 1
Fig. 1

Experimental setup for delay-and-subtract speckle imaging.

Fig. 2
Fig. 2

(a) Delay-and-subtract simulation image for a moving 0.5-mm wire. (b) One of the two individual speckle images for the moving-wire simulation. (c) Delay-and-subtract image for the turbulent-phase object. (d) One of the two individual speckle images for the phase object.

Fig. 3
Fig. 3

(a) Experimental result from the delay-and-subtract method for a moving 0.2-mm wire. (b) One of the two speckle images used for the delay-and-subtract method (the other image is similar). (c) Image of the wire with the diffusers absent from the system.

Fig. 4
Fig. 4

(a) Experimental result from the delay-and-subtract method for fluid flowing through a 1-mm inner-diameter glass tube. (b) One of the two speckle images used for the delay-and-subtract method (the second image is similar).

Fig. 5
Fig. 5

Scattering of a short pulse through a random medium. The output pulse is tremendously stretched in time as a result of multiple scattering of the light in the medium.

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