(19)

(11)

EP 0 946 919 A1

(12)

(43) Date of publication: 06.10.1999 Bulletin 1999/40 (21) Application number: 97947822.0 (22) Date of filing: 30.12.1997

(51) International Patent Classification (IPC):  G06F 17/ 30( . ) H04N 1/ 21( . ) G06T 3/ 40( . ) (86) International application number: PCT/IB1997/001607 (87) International publication number: WO 1998/029819 (09.07.1998 Gazette 1998/27)

(84) Designated Contracting States: CH DE FI FR GB IT LI NL SE (30) Priority: 30.12.1996 GB 19960027037 (71) Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE 1015 Lausanne (CH)	(72) Inventors: BASSO, Andrea N. Long Branch, NJ 07740 (US) NORO, Raffaele CH-1007 Lausanne (CH) VERSCHEURE, Olivier CH-1022 Chavannes-près-Renens (CH) HUBAUX, Jean-Pierre CH-1028 Préverenges (CH) (74) Representative: Ganguillet, Cyril  ABREMA Agence Brevets & Marques Ganguillet & Humphrey Avenue du Théâtre 16 Case postale 2065 1002 Lausanne 1002 Lausanne (CH)