EP 0888676 A1 19990107 - WATERMARKING PROCESS RESILIENT TO COLLUSION ATTACKS
Title (en)
WATERMARKING PROCESS RESILIENT TO COLLUSION ATTACKS
Title (de)
GEGEN ANGRIFFE MIT HEIMLICHEM EINVERSTÄNDNIS BESTÄNDIGES WASSERZEICHENVERFAHREN
Title (fr)
PROCEDE D'APPLICATION DE FILIGRANE EFFICACE CONTRE LES COPIES ILLICITES
Publication
Application
Priority
- US 9703816 W 19970312
- US 61553496 A 19960312
- US 67986396 A 19960715
Abstract (en)
[origin: WO9734391A1] The work to be protected by the watermark is first digitized (10), and then the baseline watermark vector is derived (12) and stored (14). Also, a watermark offset vector is created (16) and stored (18). The watermark offset vector and the baseline watermark vector are added together to generate a modified watermark vector (20). Next, the baseline watermark vector is replaced by the modified watermark vector in the digitized work to be protected (22). Finally, the watermarked work is returned to its original form (24).
IPC 1-7
IPC 8 full level
G06F 21/10 (2013.01); G06T 1/00 (2006.01); H04N 1/32 (2006.01); H04N 5/913 (2006.01); G06F 1/00 (2006.01)
CPC (source: EP US)
G06F 21/10 (2013.01 - EP US); G06F 21/16 (2013.01 - EP); G06T 1/005 (2013.01 - EP); H04N 1/32149 (2013.01 - EP); H04N 1/32304 (2013.01 - EP); H04N 1/3232 (2013.01 - EP); H04N 5/913 (2013.01 - EP); G06T 2201/0063 (2013.01 - EP); G06T 2201/0081 (2013.01 - EP); G06T 2201/0083 (2013.01 - EP); H04N 2005/91335 (2013.01 - EP); H04N 2201/3236 (2013.01 - EP); H04N 2201/324 (2013.01 - EP); H04N 2201/327 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9734391 A1 19970918; AU 2076097 A 19971001; EP 0888676 A1 19990107
DOCDB simple family (application)
US 9703816 W 19970312; AU 2076097 A 19970312; EP 97909004 A 19970312