Method and apparatus for inserting a removable visible watermark in an image and method and apparatus for removing such watermarks

A method of watermarking an image. A visible watermark is inserted in the image to obtain a visibly watermarked image. Information allowing removal of the visible watermark is protected to obtain protected information that is inserted as an invisible watermark in the visibly watermarked image to obt...

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Bibliographic Details
Main Author VIAL JEAN-FRANCOIS
Format Patent
LanguageEnglish
Published 21.01.2014
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:A method of watermarking an image. A visible watermark is inserted in the image to obtain a visibly watermarked image. Information allowing removal of the visible watermark is protected to obtain protected information that is inserted as an invisible watermark in the visibly watermarked image to obtain a visibly and invisibly watermarked image. The information allowing removal of the visible watermark may be image values of the pixels to be covered by the visible watermark and, possibly, the position and size of the visible watermark, in which case these values are first memorized. The visible watermark may be opaque. Also provided are an apparatus for inserting the watermarks, a method for removing the visible watermark, essentially by performing the method "in a mirror", and an apparatus for removing the visible watermark.
Bibliography:Application Number: US20080735006