(19)

(11)

EP 0 087 442 A1

(12)

(43) Date of publication: 07.09.1983 Bulletin 1983/36 (21) Application number: 82902666.0 (22) Date of filing: 08.09.1982

(51) International Patent Classification (IPC):  H04N 7/ 18( . ) G06K 9/ 54( . ) G01N 33/ 00( . ) G01V 5/ 00( . ) G06T 7/ 00( . ) (86) International application number: PCT/AU1982/000152 (87) International publication number: WO 1983/000972 (17.03.1983 Gazette 1983/07)

(84) Designated Contracting States: BE CH DE FR GB LI NL SE (30) Priority: 10.09.1981 AU 19810000712 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA Canberra, Australian Capital Territory 2600 (AU)

(72) Inventors: DOW, Robert James Frederick Oak Park, Vic 3046 (AU) QUINN, James Dominic East Kew, Vic 3102 (AU) SILVA, Stanley Robert East Doncaster, Vic. 3109 (AU) WILLIAMS, David William Strathmore, Vic. 3041 (AU) WU, Kenneth Kwan Mow Toorak, Vic. 3142 (AU) (74) Representative: Crawford, Andrew Birkby, et al  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)