Insertion and extraction of a message in an image
The invention concerns a method of inserting a message in an image, the message comprising binary symbols which are each referenced by an index, characterized in that it comprises, for a coefficient (Y n ) of the image, the steps of: determining (E 9 ) a watermarked value (Y′ n ) of the coefficient,...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
29.07.2004
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| Online Access | Get full text |
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| Summary: | The invention concerns a method of inserting a message in an image, the message comprising binary symbols which are each referenced by an index, characterized in that it comprises, for a coefficient (Y
n
) of the image, the steps of:
determining (E
9
) a watermarked value (Y′
n
) of the coefficient, according to the binary value (b) of a symbol of the message and according to the index (i) of the symbol,
inserting (E
11
) the watermarked value in place of the value of the coefficient. |
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