Invention Grant
- Patent Title: Digital watermark embedding apparatus and digital watermark detecting apparatus
- Patent Title (中): 数字水印嵌入装置和数字水印检测装置
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Application No.: US12403030Application Date: 2009-03-12
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Publication No.: US08270037B2Publication Date: 2012-09-18
- Inventor: Kensuke Kuraki , Shohei Nakagata , Hideaki Ishii , Motoo Masui , Taizo Anan
- Applicant: Kensuke Kuraki , Shohei Nakagata , Hideaki Ishii , Motoo Masui , Taizo Anan
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Main IPC: H04N1/40
- IPC: H04N1/40
Abstract:
A plurality of background texture patterns each of which includes a region not having a dot and having a feature different from those of the other background texture patterns, are combined, and information is embedded in a background region of a document image. Then, a mathematical-morphology-based conversion is performed on the document image, and thereby a feature of a region not having a dot in each of the background texture patterns is extracted in order to identify the embedded information.
Public/Granted literature
- US20090174910A1 DIGITAL WATERMARK EMBEDDING APPARATUS AND DIGITAL WATERMARK DETECTING APPARATUS Public/Granted day:2009-07-09
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