| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for burying a watermark in which a visible watermark removable completely is buried in case of an authorized user, and a third person cannot remove the visible watermark easily. SOLUTION: For an original moving video composed of N frame images from first through N frames, (a) an identification image is buried as a watermark, and the first frame is attached with one not burying the identification image as information for reproducing the identification image thus obtaining a watermarked original moving video (b). When the watermark is removed, the identification image is obtained by calculating the difference between a first frame not having a watermark and a watermarked first frame, and then the original moving video is obtained by subtracting that identification image from each frame image (a). COPYRIGHT: (C)2006,JPO&NCIPI
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