Abstract

A microcomputer-based programmable optical correlator (MPOC) is proposed for automatic pattern recognition and identification. A programmable magneto-optic spatial light modulator and a liquid-crystal light value are used to perform a real-time joint-transform correlation operation. Since the proposed MPOC consists of a microcomputer and an optical processing system, it has the advantage of real-time programmable processing capability for large space–bandwidth-product information. The basic theory and a feasibility study of the technique are given.

© 1986 Optical Society of America

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References

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  1. A. Vander Lugt, IEEE Trans. Inf. Theory IT-10, 139 (1964).
    [CrossRef]
  2. F. T. S. Yu, Optical Information Processing (Wiley-Interscience, New York, 1983).
  3. A. Huang, Proc. Soc. Photo-Opt. Instrum. Eng. 232, 119 (1980).
  4. W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).
  5. W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).
  6. F. T. S. Yu, X. J. Lu, M. F. Cao, Appl. Opt. 23, 4100 (1984).
    [CrossRef] [PubMed]
  7. F. T. S. Yu, X. J. Lu, Opt. Commun. 52, 10 (1984).
    [CrossRef]

1984 (2)

1983 (1)

W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).

1980 (1)

A. Huang, Proc. Soc. Photo-Opt. Instrum. Eng. 232, 119 (1980).

1978 (1)

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

1964 (1)

A. Vander Lugt, IEEE Trans. Inf. Theory IT-10, 139 (1964).
[CrossRef]

Anderson, R. H.

W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).

Bleha, W. P.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Brown, H. B.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Cao, M. F.

Casasent, D.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Grinberg, J.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Huang, A.

A. Huang, Proc. Soc. Photo-Opt. Instrum. Eng. 232, 119 (1980).

Lipton, L. P.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Lu, X. J.

Markevitch, B. V.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Psaltis, D.

W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).

Reif, P. G.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Ross, W. E.

W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).

Vander Lugt, A.

A. Vander Lugt, IEEE Trans. Inf. Theory IT-10, 139 (1964).
[CrossRef]

Wiener-Avner, E.

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Yu, F. T. S.

F. T. S. Yu, X. J. Lu, M. F. Cao, Appl. Opt. 23, 4100 (1984).
[CrossRef] [PubMed]

F. T. S. Yu, X. J. Lu, Opt. Commun. 52, 10 (1984).
[CrossRef]

F. T. S. Yu, Optical Information Processing (Wiley-Interscience, New York, 1983).

Appl. Opt. (1)

IEEE Trans. Inf. Theory (1)

A. Vander Lugt, IEEE Trans. Inf. Theory IT-10, 139 (1964).
[CrossRef]

Opt. Commun. (1)

F. T. S. Yu, X. J. Lu, Opt. Commun. 52, 10 (1984).
[CrossRef]

Opt. Eng. (2)

W. E. Ross, D. Psaltis, R. H. Anderson, Opt. Eng. 22, 485 (1983).

W. P. Bleha, L. P. Lipton, E. Wiener-Avner, J. Grinberg, P. G. Reif, D. Casasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Proc. Soc. Photo-Opt. Instrum. Eng. (1)

A. Huang, Proc. Soc. Photo-Opt. Instrum. Eng. 232, 119 (1980).

Other (1)

F. T. S. Yu, Optical Information Processing (Wiley-Interscience, New York, 1983).

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Figures (3)

Fig. 1
Fig. 1

Real-time computer-programmable optical correlator. L’s, transform lenses; BS, beam splitter.

Fig. 2
Fig. 2

Correlation distribution (no overlapping distribution). (a) Input image function, (b) output correlation distribution.

Fig. 3
Fig. 3

Block diagram of the video memory system using a serial-in/parallel-out circuit. MUX, multiplexer.

Equations (9)

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f ( x , y ) = k = 1 K f k ( x - a k , y - b k ) ,
t ( x , y ) = f ( x , y ) g ( x , y ) ,
T ( u , v ) = F ( u , v ) * G ( u , v ) .
A ( u , v ) = C 0 + C T ( u , v ) 2 ,
a ( x , y ) = C 0 δ ( x , y ) + C F - 1 [ T ( u , v ) 2 ] ,
a ( x , y ) = C 0 δ ( x , y ) + C m , n sinc 2 ( m d l ) sinc 2 ( n d l ) × exp [ - i 2 π ( m x l + n y l ) ] k K R k k ( x , y ) + C m , n sinc 2 ( m d l ) sinc 2 ( n d l ) × exp [ - i 2 π ( m x l + n y l ) ] × j , k j k K ½ { R j k [ x - ( a j - a k ) , y - ( b j - b k ) ] + R k j [ x + ( a j - a k ) , y + ( b j - b k ) ] } ,
f ( x , y ) = f 1 ( x + a , y - b ) + f 2 ( x - a , y - b ) + f 3 ( x + a , y + b ) + f 4 ( x - a , y + b ) .
f ( x , y ) = f 1 ( x - a , y - b ) + f 2 ( x , y - b ) + f 3 ( x - a , y ) + f 4 ( x , y + b ) ,
ν = h / 2 λ f ,

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