Additive vs. image dependent DWT-DCT based watermarking

Authors:
Serkan Emek;Melih Pazarci
Affiliations:
DigiTurk, Digital Plat. Il. Hiz. A.Ş., Istanbul;ITU Elektrik-Elektronik Fakültesi, Istanbul
Venue:
MRCS'06 Proceedings of the 2006 international conference on Multimedia Content Representation, Classification and Security
Year:
2006

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Abstract

We compare our earlier additive and image dependent watermarking schemes for digital images and videos. Both schemes employ DWT followed by DCT. Pseudo-random watermark values are added to mid-frequency DWT-DCT coefficients in the additive scheme. In the image dependent scheme, the watermarking coefficients are modulated with original mid-frequency DWT-DCT coefficients to increase the efficiency of the watermark embedding. Schemes are compared to each other and comparison results including Stirmark 3.1 benchmark tests are presented.