Bhowmik, D. and Abhayaratne, C. (2009) The effect of quality scalable image compression on robust watermarking. In: Digital Signal Processing, 2009 16th International Conference on , 05-07 Jul 2009, Santorini-Hellas.
Abstract
The effect of quantization based compression in quality scalable image coding on the robustness of wavelet based watermarking is presented. The non-blind direct modification type watermarking is considered for the analysis presented in this paper. First we present the analysis considering any quantization parameter and then restrict it to the integer powers of two to model the bit-plane discarding based quantization used in quality scalable coding, such as JPEG2000. This work assumes that the watermark embedding and compression uses the same wavelet filters. The derived model shows the relationship between the modified coefficients and the quantization factor, which is then used to obtain the conditions for the correct watermark extraction under compression. Based on this analysis, one can select wavelet coefficients for embedding the watermark in a manner that the correct watermark extraction is possible for a given quantization level. The results show higher robustness when this model is used for embedding the watermark. The paper also evaluates the performance of the model when the watermark embedding and the compression wavelet filters are not the same.
Metadata
Item Type: | Conference or Workshop Item |
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Authors/Creators: |
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Keywords: | Wavelet based Watermarking, Robustness, Compression, JPEG2000, Quality scalability, image watermarking. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Funding Information: | Funder Grant number EPSRC BP - EPSRC Dorothy Hodgkin Postgraduate Award |
Depositing User: | Dr Deepayan Bhowmik |
Date Deposited: | 24 Jul 2013 12:40 |
Last Modified: | 19 Dec 2022 13:25 |
Published Version: | http://dx.doi.org/10.1109/ICDSP.2009.5201225 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1109/ICDSP.2009.5201225 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:76013 |