专利检索 ap:("Hirofumi Muratani" OR "Tooru Kambayashi" OR "Tomoo Yamakage" OR "Shinichiro Koto" OR "Tomoya Kodama" OR "Hisashi Yamada") AND inv:"Tooru Kambayashi" 第 1 页

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发明授权
Digital watermark embedding method, digital watermark embedding apparatus, digital watermark detecting method, and digital watermark detecting apparatus 失效

公开(公告)号：US07123744B2

公开(公告)日：2006-10-17

申请号：US10305192

申请日：2002-11-27

申请人： Hirofumi Muratani , Tooru Kambayashi , Tomoo Yamakage , Shinichiro Koto , Tomoya Kodama , Hisashi Yamada

发明人： Hirofumi Muratani , Tooru Kambayashi , Tomoo Yamakage , Shinichiro Koto , Tomoya Kodama , Hisashi Yamada

IPC分类号： G06K9/00

CPC分类号： G06T1/0064 , G06T1/005 , G06T2201/0052 , G06T2201/0065 , G06T2201/0083

摘要： A digital watermark embedding apparatus comprises a digital watermark generating unit which transforms embedding target contents by using a filter having a coefficient with a periodic number sequence to generate a digital watermark, and an embedding unit which superposes the digital watermark on the embedding target contents to generate watermark embedded contents.