(19)
(11) EP 0 295 776 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.01.1990 Bulletin 1990/03

(43) Date of publication A2:
21.12.1988 Bulletin 1988/51

(21) Application number: 88304036.2

(22) Date of filing: 05.05.1988
(51) International Patent Classification (IPC)4: G06G 9/00
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 15.05.1987 GB 8711530

(71) Applicant: BRITISH AEROSPACE PUBLIC LIMITED COMPANY
Farnborough, Hants. GU14 6YU (GB)

(72) Inventor:
  • Aldridge, Nigel British Aerospace P.L.C.
    Filton Bristol BS12 7QW (GB)

(74) Representative: Rooney, Paul Blaise et al
British Aerospace plc, Corporate Intellectual Property Department, Park East, PO Box 87, Farnborough Aerospace Centre
Farnborough, Hants GU14 6YU
Farnborough, Hants GU14 6YU (GB)


(56) References cited: : 
   
       


    (54) Optical correlation


    (57) An optical correlation process involving correlating a second order differentiated reference function with a first order differentiated input function, or vice versa, so that the discriminating feature of a desired correlation is not only its intensity but also its characteristic form.







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