Image analysis – Applications
Reexamination Certificate
2007-07-17
2007-07-17
Johns, Andrew W. (Department: 2624)
Image analysis
Applications
C382S176000, C358S003280, C358S464000, C713S176000
Reexamination Certificate
active
10609571
ABSTRACT:
To provide an electronic watermark embedding device for improving accuracy when classified information is being detected. The watermark image forming section1006creates a watermark image based on classified information1004with reference to the document image. For the document image, embedding regions for embedding a dot pattern which is identifiable as a prescribed symbol by a prescribed filter are detected, and a determination is made as to whether or not the proportion of the text region to the embedding region is less than or equal to a prescribed threshold value, and if the proportion of the text region is less than or equal to the prescribed threshold value, a prescribed number of dot patterns in which a symbol formed of at least a portion of the classified information is identifiable (symbol unit) is embedded in a region where the embedding region and the text region do not overlap. Because classified information is embedded only in regions that do not overlap with the text region by using the document image as a reference, embedding of classified information can be ensured regardless of the form of the original document.
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Johns Andrew W.
Mackowey Anthony
Oki Electric Industry Co. Ltd.
Petaja Kyle D.
Sartori Michael A.
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