Image analysis – Applications
Reexamination Certificate
2006-02-28
2006-02-28
Johns, Andrew W. (Department: 2621)
Image analysis
Applications
C348S461000
Reexamination Certificate
active
07006655
ABSTRACT:
The present invention provides methods, apparatus and systems for embedding and detecting an electronic watermark without requiring signals for geometric compensation. A particular embodiment uses a periodic pattern with repetition as an embedded pattern itself, which has information embedded as an electronic watermark, and observes the change of its period upon detection to calculate the scaling factor. When detecting the electronic watermark, the scaling factor of images is calculated from digital data that underwent the scaling processing, and then the processing to detect the electronic watermark is performed based on the obtained scaling factor.
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Kamijoh Kohichi
Shimizu Shuhichi
Sugihara Ryoh
Taniguchi Masaaki
Herzberg Louis P.
Johns Andrew W.
Scully Scott Murphy & Presser
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