Digital Forensics and Watermarking by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9783030435752
Publisher: Springer International Publishing

2.3 Extraction of Additional Data and Reconstruction of Image

At the receiver’s side, the additional data extraction is done with and without the auxiliary information. The data hider can do the embedding in two ways, (1) he/she generates the auxiliary information (with a particular threshold value, not necessarily maximum) and (2) he/she does the embedding without auxiliary information (this is the case when the threshold is set to maximum, until all pixels have been used for embedding). The embedded additional data is extracted using Eq. (4), the shared auxiliary information and the scrambling key .

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