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Non-Patent Document 3 and Patent Document 1 disclose a method of embedding a character with information by changing the shape of the character. Non-Patent Document 2 discloses a method of enlarging, reducing and rotating a character to embed the information in an electronic document ( FIG. Non-Patent Document 1 discloses a method of embedment information among words by horizontally shifting the locations of the words ( FIG. As to an electronic medium which may be printed as a document image, it is preferable that the embedment information be detected from not only the electronic data but also a printed paper medium. The technique of the electronic watermark enables embedding the information in an object without being perceived by persons because the information is secretly embedded as a so-called “watermark”.įurther, the technique of the electronic watermark enables confirming an unauthorized duplication of a copyrighted work, and tracing leakage of in-company information by detecting the embedment information from the electronic data.
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BACKGROUNDĪ technique called “electronic watermark” is provided to embed a copyright notice or tracking information of a person who reproduces a copyrighted work in electronic data such as images and sounds. The embodiments discussed herein are related to an electronic watermark embedding device, an electronic watermark detecting device, and programs therefore. 31, 2007, the entire contents of which are incorporated herein by reference. continuation application filed under 35 USC 111(a) and 365(c) of PCT/JP2007/067014 filed on Aug.
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