Дисертації з теми "Multimedia information objects"
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Gupta, Gaurav. "Robust digital watermarking of multimedia objects." Phd thesis, Australia : Macquarie University, 2008. http://hdl.handle.net/1959.14/28597.
Повний текст джерелаBibliography: p. 144-153.
Introduction -- Background -- Overview of watermarking -- Natural language watermarking -- Software watermarking -- Semi-blind and reversible database watermarking -- Blind and reversible database watermarking -- Conclusion and future research -- Bibliography.
Digital watermarking has generated significant research and commercial interest in the past decade. The primary factors contributing to this surge are widespread use of the Internet with improved bandwidth and speed, regional copyright loopholes in terms of legislation; and seamless distribution of multimedia content due to peer-to-peer file-sharing applications. -- Digital watermarking addresses the issue of establishing ownership over mul-timedia content through embedding a watermark inside the object. Ideally, this watermark should be detectable and/or extractable, survive attacks such as digital reproduction and content-specific manipulations such as re-sizing in the case of images, and be invisible to the end-user so that the quality of the content is not degraded significantly. During detection or extraction, the only requirements should be the secret key and the watermarked multimedia object, and not the original un-marked object or the watermark inserted. Watermarking scheme that facilitate this requirement are categorized as blind. In recent times, reversibility of watermark has also become an important criterion. This is due to the fact that reversible watermarking schemes can provided security against secondary watermarking attacks by using backtracking algorithms to identify the rightful owner. A watermarking scheme is said to be reversible if the original unmarked object can be regenerated from the watermarked copy and the secret key.
This research covers three multimedia content types: natural language documents, software, and databases; and discusses the current watermarking scenario, challenges, and our contribution to the field. We have designed and implemented a natural language watermarking scheme that uses the redundancies in natural languages. As a result, it is robust against general attacks against text watermarks. It offers additional strength to the scheme by localizing the attack to the modified section and using error correction codes to detect the watermark. Our first contribution in software watermarking is identification and exploitation of weaknesses in branch-based software watermarking scheme proposed in [71] and the software watermarking algorithm we present is an improvised version of the existing watermarking schemes from [71]. Our scheme survives automated debugging attacks against which the current schemes are vulnerable, and is also secure against other software-specific attacks. We have proposed two database watermarking schemes that are both reversible and therefore resilient against secondary watermarking attacks. The first of these database watermarking schemes is semi-blind and requires the bits modified during the insertion algorithm to detect the watermark. The second scheme is an upgraded version that is blind and therefore does not require anything except a secret key and the watermarked relation. The watermark has a 89% probability of survival even when almost half of the data is manipulated. The watermarked data in this case is extremely useful from the users' perspective, since query results are preserved (i.e., the watermarked data gives the same results for a query as the nmarked data). -- The watermarking models we have proposed provide greater security against sophisticated attacks in different domains while providing sufficient watermark-carrying capacity at the same time. The false-positives are extremely low in all the models, thereby making accidental detection of watermark in a random object almost negligible. Reversibility has been facilitated in the later watermarking algorithms and is a solution to the secondary watermarking attacks. We shall address reversibility as a key issue in our future research, along with robustness, low false-positives and high capacity.
Mode of access: World Wide Web.
xxiv, 156 p. ill. (some col.)
Chan, Wing Sze. "Semantic search of multimedia data objects through collaborative intelligence." HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1171.
Повний текст джерелаFuhr, Norbert Roelleke Thomas Goevert Norbert. "DOLORES: A System for Logic-Based Retrieval of Multimedia Objects." Gerhard-Mercator-Universitaet Duisburg, 2004. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-04232004-133407/.
Повний текст джерелаWatkins, Alfred R. "Continuous media object modeling, storage, and retrieval." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/9184.
Повний текст джерелаChavan, Rohit. "JAVA synchronized collaborative multimedia toolkit: A collaborative communication tool." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2549.
Повний текст джерелаMaynard, David Charles. "Paying Attention to the Alien: Reevaluating Composition Studies' Construction of Human Agency in Light of Secret Government Surveillance." University of Findlay / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=findlay149381947498726.
Повний текст джерелаPahuja, Neena. "Multimedia information objects: A model and scheduling algorithm for synchronized replay." Thesis, 1999. http://localhost:8080/iit/handle/2074/2225.
Повний текст джерела"Indexing methods for multimedia data objects given pair-wise distances." 1997. http://library.cuhk.edu.hk/record=b5889136.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 1997.
Includes bibliographical references (leaves 67-70).
Abstract --- p.ii
Acknowledgement --- p.iii
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Definitions --- p.3
Chapter 1.2 --- Thesis Overview --- p.5
Chapter 2 --- Background and Related Work --- p.6
Chapter 2.1 --- Feature-Based Index Structures --- p.6
Chapter 2.2 --- Distance Preserving Methods --- p.8
Chapter 2.3 --- Distance-Based Index Structures --- p.9
Chapter 2.3.1 --- The Vantage-Point Tree Method --- p.10
Chapter 3 --- The Problem of Distance Preserving Methods in Querying --- p.12
Chapter 3.1 --- Some Experimental Results --- p.13
Chapter 3.2 --- Discussion --- p.15
Chapter 4 --- Nearest Neighbor Search in VP-trees --- p.17
Chapter 4.1 --- The sigma-factor Algorithm --- p.18
Chapter 4.2 --- The Constant-α Algorithm --- p.22
Chapter 4.3 --- The Single-Pass Algorithm --- p.24
Chapter 4.4 --- Discussion --- p.25
Chapter 4.5 --- Performance Evaluation --- p.26
Chapter 4.5.1 --- Experimental Setup --- p.27
Chapter 4.5.2 --- Results --- p.28
Chapter 5 --- Update Operations on VP-trees --- p.41
Chapter 5.1 --- Insert --- p.41
Chapter 5.2 --- Delete --- p.48
Chapter 5.3 --- Performance Evaluation --- p.51
Chapter 6 --- Minimizing Distance Computations --- p.57
Chapter 6.1 --- A Single Vantage Point per Level --- p.58
Chapter 6.2 --- Reuse of Vantage Points --- p.59
Chapter 6.3 --- Performance Evaluation --- p.60
Chapter 7 --- Conclusions and Future Work --- p.63
Chapter 7.1 --- Future Work --- p.65
Bibliography --- p.67
"The effects of evaluation and rotation on descriptors and similarity measures for a single class of image objects." Thesis, 2008. http://hdl.handle.net/10210/564.
Повний текст джерелаDr. W.A. Clarke
Kuo, Hai-Hua, and 郭海華. "An Information Sharing Workspace Supporting Multimedia of XML Object." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/84268779189139563596.
Повний текст джерела國立成功大學
電腦與通信工程研究所
93
The concept of XML Information Object has been proposed by our research team. For management and reusing purpose, the Internet information is modelled as Information Object that can be manipulated and exchanged as a unit. We use an XML file as a unit to encapsulate text data and binary contents as an XML Object to realize the concept of Information Object. To realize the idea we have developed a storage management system called XML Document Storage (XDS). In addition, we have implemented the Information Sharing Workspace (ISW) as a workspace on which users can easily construct XML Objects and share XML Objects stored in XDS. In this thesis, we will model the total system, both the XDS and the ISW to give a more clear view for exploring advanced topic or issues to be addressed in the future. In particular, we will pay much effort on the improving of binary contents attachment in an XML object. In the previous version of XDS, the binary content is BASE64-encoded and embedded in an element of an XML object for transmission on the wire. This way will incur a problem of XML object size limitation due to the implementation constraints of XML and language tools. Another problem is on the performance in manipulating binary contents. To cope with these problems, we define several kinds of attachment objects to represent the binary contents and linked to an XML object for transmission. With the new approach the size limitation and the efficiency on manipulating binary contents are improved.
Veřmiřovský, Jan. "Efektivita tvorby a využití multimediálních studijních opor ve výuce chemie na SŠ (přechodné prvky)." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-305980.
Повний текст джерелаBALLAN, LAMBERTO. "Object and event recognition in multimedia archives using local visual features." Doctoral thesis, 2011. http://hdl.handle.net/2158/485661.
Повний текст джерелаEberhardt, Reinhold [Verfasser]. "A multimedia device and stream management architecture based on distributed object computing technology = Eine Architektur für das Management von multimedialen Geräten und Strömen unter Einsatz verteilter Objekttechnologie / von Reinhold Eberhardt." 2001. http://d-nb.info/962736554/34.
Повний текст джерелаRuppel, Markus [Verfasser]. "Design und Implementierung einer grafischen Benutzeroberfläche zur Verwaltung einer Datenbank für multimediale medizinische Objekte auf Basis XML-codierter Inhalte / vorgelegt von Markus Ruppel." 2003. http://d-nb.info/96864807X/34.
Повний текст джерелаVerhaart, Michael Henry. "The virtualMe : a knowledge acquisition framework : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy (Ph.D.) in Information Systems at Massey University, Palmerston North, New Zealand." 2008. http://hdl.handle.net/10179/851.
Повний текст джерела