METHOD FOR EXTRACTING AND INSERTING DIGITAL WATER MARKING USING LATTICE

PURPOSE: A method for extracting and inserting a digital water marking using a lattice is provided, which is strong against collusion attacks, protects and authenticates CONSTITUTION: The original image passes through FFT or DCT to determines a recognizably definite portion, and information about th...

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Bibliographic Details
Main Authors LEE, SANG JIN, LIM, JONG IN, YOO, HYE JEONG
Format Patent
LanguageEnglish
Korean
Published 19.01.2002
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:PURPOSE: A method for extracting and inserting a digital water marking using a lattice is provided, which is strong against collusion attacks, protects and authenticates CONSTITUTION: The original image passes through FFT or DCT to determines a recognizably definite portion, and information about the determined portion is represented by a lattice point. A water mark is inserted into the portion represented by the lattice point. The water mark is selected such that it does not damage the original image. An error vector value is inserted into the lattice point and FFT or DCT is carried out to generate an image into which the water mark has been inserted.
Bibliography:Application Number: KR20000039885