D. Kundur and D. Hatzinakos, "Improved robust watermarking through attack characterization," in Optics Express, vol. 3, December 1998, pp. 485--490.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....role, it can be modeled as fast fading channel. It is important to note that the matched filter produces a soft output that can be important for further decoding. The scheme with the hard output assuming binary symmetric channels was first proposed by Kundur et al. in watermarking applications [33]. This scheme is considerably simplified and 21 does not require the estimation of the channel non stationary variances and parameters of the fading. It is modeled using only error probablities for each channel. As a consequence, weighted coefficients are derived for the diversity summation like ....

D. Kundur and D. Hatzinakos. Improved robust watermarking through attack characterization. In Optics Express, volume 3, pages 485--490, December 1998.

....In many cases, blind watermarking is also a requirement meaning that the original image should not be used during the detection phase. Watermarking has recently become a very active research area, a fact established by the numerous methods dealing with the watermarking of audio [6] image [2] 7] [11] or video content [12] 16] that have appeared in the literature to date. They are distinguished in two classes, with respect to the embedding and detection domain, namely, the spatial domain [2] 6] 7] and the transformdomain methods. In the latter case, embedding is performed in a number of ....

D. Kundur, D. Hatzinakos, Improved robust watermarking through attack characterization, Optics Express 3 (12) (1998) 485-490.

....estimation. Previous known associated reliability. In our analysis, we work has demonstrated through practical make use of the probability of bit error measure. implementation and simulations the improved Many proposed watermarking algorithms [2,8 13] this performance of taking such an approach [7]. is by no means an exhaustive list) are encompassed by This paper provides analysis to demonstrate the this class of techniques or can be easily modified to fit advantages of incorporating these new principles for this category. digital watermarking, and outlines approaches to The specific ....

....M estimates of the watermark, As discussed in the previous section each estimate has an associated probability of bit error . We assume that some sort of characterization is performed so that a good estimate of is available. Such a technique is presented, implemented and tested in [7]. Our framework is analogous to transmitting the watermark simultaneously along M independent binary symmetric channels (BSC) as shown in Figure 1. The error probabilities are assumed to be known and independent of one another. If , then the output is complemented and is used as the probability ....

[Article contains additional citation context not shown here]

D. Kundur and D. Hatzinakos, "Improved robust watermarking through attack characterization," Optics Express focus issue on Digital Watermarking, vol. 3, no. 12, pp. 485-490, Dec. 7, 1998.

No context found.

D. Kundur and D. Hatzinakos, \Improved robust watermarking through attack characterization," Optics Express 3, pp. 485-490, December 7 1998.

....the condition that the coefficient sensitivity function ckey is disclosed. These properties make the method appealing for other multimedia security applications. Related work has demonstrated the usefulness of telltale watermarking for tamper recovery [12] and watermark attack characterization [15]. In [12] the authors demonstrated how telltale watermarking can be used for semi blind image restoration. In this problem the marked image undergoes unknown blurring and must be recovered using information on how the corresponding fragile watermark is distorted. In [15] the authors demonstrate ....

....attack characterization [15] In [12] the authors demonstrated how telltale watermarking can be used for semi blind image restoration. In this problem the marked image undergoes unknown blurring and must be recovered using information on how the corresponding fragile watermark is distorted. In [15] the authors demonstrate how a fragile watermark can be embedded in addition to a robust watermark to characterize image tampering. The characterization process allows optimal robust watermark extraction which improves security for copyright protection applications. 5 Simulation Results and ....

D. Kundur and D. Hatzinakos, "Improved robust watermarking through attack characterization, " Optics Express, vol. 3, pp. 485--490, December 7 1998.

No context found.

D. Kundur and D. Hatzinakos, "Improved robust watermarking through attack characterization," in Optics Express, vol. 3, December 1998, pp. 485--490.

No context found.

Deepa Kundur and Dimitrios Hatzinakos. Improved robust watermarking through attack characterisation. In Optics Express Focus Issue: Digital Watermarking, volume 3, pages 485-490, December 1998.

No context found.

D. Kundur and D. Hatzinakos, "Improved robust watermarking through attackcharacterization," in Optics Express,vol. 3, pp. 485--490, December 1998.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC