Data hiding method and data extraction method using...

Details Data hiding method and data extraction method using... Data hiding method and data extraction method using...

H - Electricity

04

L

H04L 9/14 (2006.01) G06T 1/00 (2006.01) H04N 1/32 (2006.01)

Patent

CA 2224019

It is intended to make it possible to properly certify who is a genuine owner, and to inhibit deterioration of image quality of media information to which the embedding operation is performed by adaptively determining amount of the operation for characteristic values such as pixel values. The invention provides a data hiding method for embedding message data into media data comprising the steps of obtaining a secondary key by inputting a key having a predetermined value to a specified function; determining hiding positions in which the message data will be embedded according to the obtained secondary key, and selecting one of plural hiding functions according to the secondary key so that the selected hiding function is used for each of the determined hiding positions; and embedding the message data into each of the determined hiding positions according to the selected hiding function corresponding to the hiding position.

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