Invention Grant
US08427509B2 Method for embedding messages into documents using distance fields
失效
使用距离字段将消息嵌入到文档中的方法
- Patent Title: Method for embedding messages into documents using distance fields
- Patent Title (中): 使用距离字段将消息嵌入到文档中的方法
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Application No.: US12347277Application Date: 2008-12-31
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Publication No.: US08427509B2Publication Date: 2013-04-23
- Inventor: Shantanu Rane , Ronald N. Perry , Anthony Vetro
- Applicant: Shantanu Rane , Ronald N. Perry , Anthony Vetro
- Applicant Address: US MA Cambridge
- Assignee: Mitsubishi Electric Research Laboratories, Inc.
- Current Assignee: Mitsubishi Electric Research Laboratories, Inc.
- Current Assignee Address: US MA Cambridge
- Agent Dirk Brinkman; Gene Vinokur
- Main IPC: G09G5/00
- IPC: G09G5/00
Abstract:
A method embeds a message into a document containing a set of glyphs. Individual glyphs in the document, groups of glyphs in the document, or the entire document are represented using a distance field that includes distance values from the shapes of interest. Each symbol of the message is represented as modifications of a subset of the distance values in the distance field. This subset of the distance values in the distance field is modified according to modification to produce a modified glyph in a modified document, wherein the symbol in the message is embedded in the modified glyph.
Public/Granted literature
- US20100164984A1 Method for Embedding Messages into Documents Using Distance Fields Public/Granted day:2010-07-01
Information query
