Download Digital Watermarking: 5th International Workshop, IWDW 2006, by Ingemar J. Cox, Gwenaël Doërr, Teddy Furon (auth.), Yun Qing PDF

By Ingemar J. Cox, Gwenaël Doërr, Teddy Furon (auth.), Yun Qing Shi, Byeungwoo Jeon (eds.)

Welcome to the court cases of the 5th foreign Workshop on electronic Watermarking (IWDW). because the first IWDW held in Seoul, Korea in 2002, it's been a focus for assembly in individual and disseminating priceless medical and technological advancements in watermarking. IWDW 2006 used to be hung on Jeju, the dream island in Korea. the most topic of the workshop was once “Meet the demanding situations during this electronic World!” As we know, electronic watermarking and its comparable applied sciences have emerged because the key materials of this electronic global. We document on new advancements and talk about the best way to most sensible make the most of the watermarking and its comparable new applied sciences to deal with many difficult concerns during this electronic global. This 12 months, we accredited 34 papers out of seventy six hugely certified submissions from 14 varied international locations. each one paper was once reviewed through 3 reviewers. The attractiveness ratio of forty four% exhibits IWDW’s carrying on with dedication to making sure the standard of the workshop. furthermore, we had 3 invited lectures and one panel dialogue that shed worthwhile insights to the watermarking group on new advancements and destiny instructions. The technical software featured such themes as steganography and steganalysis, info forensics, electronic correct administration, safe watermarking, and their functions. The 34 authorised papers, 3 invited lectures, and the panel dialogue coated either theoretical and sensible matters that every one people can take advantage of. in addition, thirteen of the 34 papers have been prepared in a poster consultation with a purpose to facilitate extra effective and interactive info exchange.

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Extra info for Digital Watermarking: 5th International Workshop, IWDW 2006, Jeju Island, Korea, November 8-10, 2006. Proceedings

Sample text

Invisible . . Jsteg . . . . Masker . . . MP3Stego . Pngstego . . Stegano . . Steganos . . Steggy . . . Ump3c . . . Attack prototype Table 3. —slightly better than random guessing, (. . )—attack not implemented Break excl. ) excl. ) excl. excl. ) excl. excl. excl. ) excl. excl. capacity for a given file size can easily identify a large number of plain carriers. This ratio increases for smaller carrier files. Examples: BlindSide [5], Contraband [7], EncryptPic [8], Gif it up! [9], Stegano [6], Steggy [10].

In order to give a formal description, let hi denote the observed sample histogram. Then, for the induced categories (2m, 2m + 1), the observed distribution {om } is given by om = h2m , (1) and the expected distribution {em } is determined by em = h2m + h2m+1 . 2 (2) The difference between the two distributions is measured by the following χ2 statistics with ν − 1 degrees of freedom, χ2 = em =0 1 (om − em )2 = em 2 m∈Z (h2m − h2m+1 )2 , h2m + h2m+1 (3) where ν is the number of different categories.

This fact is generally untrue for cover images and was used for their categorical data analysis, named the chi-square attack. The chi-square attack is the way of measuring the degree of similarity between the observed sample distribution and the theoretically expected distribution in the induced categories, by means of a hypothesis test, the χ2 -test. In order to give a formal description, let hi denote the observed sample histogram. Then, for the induced categories (2m, 2m + 1), the observed distribution {om } is given by om = h2m , (1) and the expected distribution {em } is determined by em = h2m + h2m+1 .

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