Inventor
ANZAI KOUSUKE
JP12 patents
Patents
12 patentsUS6563935B1May 13, 2003
Method of extracting digital watermark information and method of judging bit value of digital watermark information
HITACHI LTD81 citations97
US7113613B2Sep 26, 2006
Watermark information detection method
HITACHI LTD29 citations92
US6665417B1Dec 16, 2003
Method of judging digital watermark information
HITACHI LTD25 citations92
US6456727B1Sep 24, 2002
Method of extracting digital watermark information and method of judging but value of digital watermark information
HITACHI LTD25 citations92
US7065226B1Jun 20, 2006
Method for embedding information and extracting the same
HITACHI LTD23 citations91
US7478432B2Jan 13, 2009
Method and system for contents control
HITACHI LTD16 citations83
US7293294B2Nov 6, 2007
Method and apparatus for using contents
HITACHI LTD18 citations81
US7748041B2Jun 29, 2010
Tool, method, and program for supporting system security design/evaluation
HITACHI LTD9 citations80
US6970575B2Nov 29, 2005
Method of extracting digital watermark information and method of judging bit value of digital watermark information
HITACHI LTD5 citations73
US6650763B2Nov 18, 2003
Method of extracting digital watermark information and method of judging bit value of digital watermark information
HITACHI LTD12 citations73
US7310428B2Dec 18, 2007
Method of detecting digital watermark information
HITACHI LTD4 citations62
US6959101B2Oct 25, 2005
Method of judging digital watermark information
HITACHI LTD3 citations62