Image analysis – Applications
Reexamination Certificate
2006-09-12
2006-09-12
Wu, Jingge (Department: 2623)
Image analysis
Applications
C713S176000
Reexamination Certificate
active
07106884
ABSTRACT:
This invention provides a digital watermark embedding apparatus for a document, which can eliminate unnaturalness that may be experienced upon laying out characters in a document when watermark information is embedded, while maintaining the robustness of a document itself and the information size to be embedded of a digital watermark. A document image is input from an image input unit (11), and watermark information is input from a watermark information input unit (15). A region division unit (12) divides the document image into regions, and a circumscribing rectangle extraction unit (13) sets circumscribing rectangles for characters and extracts them as character images. A punctuation mark determination unit (14) determines a punctuation mark from the character image. A watermark information embedding unit (16) embeds watermark information by digital watermarking that shifts character images other than the character image determined to be a punctuation mark.
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Bhatnagar Anand
Wu Jingge
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