| 摘要 |
The method involves modulating coefficients (X) of the regions (R) representing a digital image (I). The partitioning into regions is effected by an adaptive partitioning as a function of a criterion of detectability of an information bit inserted on each region. The method involves generation of a centered pseudo-random sequence equal in size to the cardinal number (N) of the set of coefficients, formed from centered pseudo-random sub-sequences. The set of coefficients are modulated by the centered pseudo-random sequence in order to insert the same information bit on the set of coefficients. Finally the method involves checking, over each region, of a criterion of detectability of the information bit inserted by modulation. Independent claims are included for a method of decoding a watermarking signal in a digital image, for a partition determination device and for a decoding device.
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