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Conference on Intelligent Information systems (IIS 97)

作者： Maybury, MT Merlino, AE Mitre Corp Adv Informat Syst Ctr Bedford MA 01730 USA

ISBN: (纸本)0818682183

Increasing amounts of text, audio, and video content has fueled efforts to provide direct, content based access to these materials. Summaries are often necessary to enable timely relevancy assessments, information extraction, or information analysis from source material. Whereas text summarization research is receiving increasing attention, comparatively few investigators have examined video summarization. This paper reports on the extension of a broadcast news access system to provide multimedia summaries. We briefly overview our system for video analysis, focusing on our novel integration of image, speech and language processing techniques to support automated video summarization. We outline algorithms for proper name and keyphrase extraction, story segmentation, and key frame extraction which together underpin our current ability to automatically summarize video. We describe the systems ability to generate multimedia video summaries tailored to a user query. We discuss evaluation metrics for measuring the (quality) value of these summary artifacts.

关键词： content-based video access video summarization broadcast news

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Overcome the shortcoming in mobile stereoscopy

Overcome the shortcoming in mobile stereoscopy

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Conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems V

作者： Lee, Kwang-Hoon Kim, Sung-Kyu Konkuk Univ Dept Adv Technol Fus Seoul South Korea KIST Imaging Media Res Ctr Seoul South Korea

ISBN: (纸本)9780819484185

The mobile device has the lacked space for configuring cameras to make either ortho- or hyperstereoscopic condition with a small size of display. Therefore mobile stereoscopy cannot provide a presence with a good depth sense to an observer. To solve this problem, we focused on the depth sense control method with a switchable stereo camera alignment. In converging type, the fusible stereo area becomes wider compared to a parallel type when the same focal length was used in both types. This matter makes it that the stereo fusible area formed by converging type to be equal to the parallel type with a more shorten focal length. Therefore there is a kind of the zoom-out effect at the reconstructed depth sense. In diverging type, the fusible stereo area becomes narrower than the parallel. As the same way, the diverging type guarantees a similar characteristic of that an increased focal length is considered in parallel type. Therefore there is a zoom-in effect existing. Stereoscopic zoom-in depth effect becomes rapidly changed by the increased angle but zoom-out becomes retarded relatively.

关键词： Stereoscopic cameras Cameras Sensors Stereoscopy Distributed interactive simulations Image processing Imaging systems Mobile devices Image sensors multimedia

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On robustness against JPEG2000: a performance evaluation of wavelet-based watermarking techniques

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multimedia systems 2014年第2期20卷 239-252页

作者： Bhowmik, Deepayan Abhayaratne, Charith Heriot Watt Univ Inst Sensors Signals & Syst Vis Lab Edinburgh EH14 4AS Midlothian Scotland Univ Sheffield Dept Elect & Elect Engn Sheffield S1 3JD S Yorkshire England Univ Sheffield Sheffield S1 3JD S Yorkshire England

With the emergence of new scalable coding standards, such as JPEG2000, multimedia is stored as scalable coded bit streams that may be adapted to cater network, device and usage preferences in multimedia usage chains providing universal multimedia access. These adaptations include quality, resolution, frame rate and region of interest scalability and achieved by discarding least significant parts of the bit stream according to the scalability criteria. Such content adaptations may also affect the content protection data, such as watermarks, hidden in the original content. Many wavelet-based robust watermarking techniques robust to such JPEG2000 compression attacks are proposed in the literature. In this paper, we have categorized and evaluated the robustness of such wavelet-based image watermarking techniques against JPEG2000 compression, in terms of algorithmic choices, wavelet kernel selection, subband selection, or watermark selection using a new modular framework. As most of the algorithms use a different set of parametric combination, this analysis is particularly useful to understand the effect of various parameters on the robustness under a common platform and helpful to design any such new algorithm. The analysis also considers the imperceptibility performance of the watermark embedding, as robustness and imperceptibility are two main watermarking properties, complementary to each other.

关键词： Wavelet-based image watermarking Watermarking evaluation Robustness Scalable coding content adaptation JPEG2000

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Cooperative classification of shared images

Cooperative classification of shared images

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Conference on Imaging and Printing in a Web 2.0 World;and multimedia content access - algorithms and systems IV

作者： Cusano, Claudio Santini, Simone Univ Milano Bicocca Viale Sarca 336 I-20126 Milan Italy Univ Autonoma Madrid E-28049 Madrid Spain

ISBN: (纸本)9780819479334

We propose a method the for semi-automatic organization of photo albums. The method analyzes how different users organize their own pictures. The goal is to help the user in dividing his pictures into groups characterized by a similar semantic content. The method is semi-automatic: the user starts to assign labels to the pictures and unlabeled pictures are tagged with proposed labels. The user can accept the recommendation or made a correction. We use a suitable feature representation of the images to model the different classes that the users have collected. Then, we look for correspondences between the criteria used by the different users which are integrated using boosting. A quantitative evaluation of the proposed approach is obtained by simulating the amount of user interaction needed to annotate the albums of a set of members of the flickr (R) photo-sharing community.

关键词： Personal photography automatic image annotation content-based image analysis social image retrieval

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content-based retrieval in multimedia databases based on feature models 1st

Content-based retrieval in multimedia databases based on fea...

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1st International Conference on Advanced multimedia content Processing (AMCP 98)

作者： Apers, P Kersten, M Univ Twente NL-7500 AE Enschede Netherlands CWI NL-1009 AB Amsterdam Netherlands

ISBN: (纸本)3540657622

With the increasing popularity of WWW, the main challenge in computer science has become content-based retrieval of multimedia objects. Until now access of multimedia objects in databases was done by means of keywords. Now, with the integration of feature-detection algorithms in database systems software, content-based retrieval can be fully integrated with query processing. In this invited paper, we describe our experimentation platform under development that fully integrates traditional query processing and content-based retrieval and that is based on feature databases, making database technology available to multimedia.

关键词： content based retrieval

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Formulating models to survive multimedia big content from integrity violation

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Journal of Ambient Intelligence and Humanized Computing 2018年 1-10页

作者： Aljawarneh, Shadi A. Faculty of Computer and Information Technology Jordan University of Science and Technology Irbid Jordan

With exponential growth in social media sites and high penetration of Internet access and digital computing devices, there are humongous amounts of public data being generated on a day-to-day basis. Almost real-time information regarding the emerging trends can be gained through efficient techniques/algorithms to examine this enormous amount of data, which also gives hint about early warning if there is an imminent emergency case. Also, numerous helpful indicators regarding political and socioeconomic events can be seen through by carefully mining these data, which also aid in establishing efficient public policies. However, web services and data security—protection of systems and key data to avoid unauthorised tampering—is considered to be a non-trivial real-time issue. Moreover, security issue has always been a grave issue since there is frequent conflict of service availability with the security constraints should there be a change in the service media channels. The paper’s primary focus is on new mathematical models that help in simplifying and enhancing protection for multimedia big content against unauthorised tampering by examining elements of multimedia objects. Furthermore, a multimedia big data security framework is presented in this paper. This framework, built on the basis of the proposed models, will be employed to confirm the on-fly multimedia content for a requested service/page. It is believed that such type of a framework provides a higher level of service survivability as well as user confidence. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Big data

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Image quality assessment in multimedia applications

Image quality assessment in multimedia applications

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multimedia content access: algorithms and systems III

作者： Ciocca, G. Marini, F. Schettini, R. DISCo Dipartimento di Informatica Sistemistica e Comunicazione Universita Degli Studi di Milano-Bicocca Viale Sarca 336 20126 Milano Italy

In the framework of multimedia applications image quality may have different meanings and interpretations. In this paper, considering the quality of an image as the degree of adequacy to its function/goal within a specific application field, we provide an organized overview of image quality assessment methods by putting in evidence their applicability and limitations in different application domains. Three scenarios have been chosen representing three typical applications with different degree of constraints in their image workflow chains and requiring different image quality assessment methodologies. ©2009 SPIE-IS&T.

关键词： Image quality

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Using ePub as framework for the automated collection, tagging, and transformation of web content for cross-media publication

Using ePub as framework for the automated collection, taggin...

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Imaging and Printing in a Web 2.0 World;and multimedia content access: algorithms and systems IV

作者： Henderson, Tona Battle, Steven Bernius, Matt Choudhury, Manu Open Publishing Lab. Rochester Institute of Technology Rochester NY United States HP Labs. United States

In this paper, we describe the development of Page2Pub, a Firefox extension for gathering, unifying, and publishing a wide variety of web based materials. © 2010 Copyright SPIE - The International Society for Opt... 详细信息

ISBN: (纸本)9780819479334

关键词： Semantic Web

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Using Wi-Fi-Hotspots as an intrusion vector into corporate networks

Using Wi-Fi-Hotspots as an intrusion vector into corporate n...

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Conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems VI

作者： Scharsich, Maximilian Holl, Friedrich L. Univ. of Applied Sciences Brandenburg (Germany)

ISBN: (纸本)9780819489517

The following paper describes a method of gaining access to corporate networks through users who use virtual private networks over a modified Hotspot under the control of an attacker. Over 100,000 Hotspots offer an easy access to the Internet throughout the world. Almost every operator will inform the user though that browsing via a Hotspot is insecure because the connection is unencrypted. Hotspots often offer no typical encryption like WEP, WPA or WPA2;the communication is just send over the air, readable for everyone. This situation is not unknown - the Firesheep-Plugin for Firefox shows this impressive. One possible solution is the usage of a Virtual Private Network (VPN), which enables the user to communicate through a secure tunnel. In this typical business case the company's VPN is used to access internal documents and work with business' applications. All data sent out via a Hotspot using a VPN is encrypted and unreadable for potential attackers. But, what if the Hotspot, the user's connected to, is already under the control of an attacker? Nowadays it's easy to use hardware which extends the range of the Wi-Fi enormously and to set up an own Hotspot (with little expense). If an attacker then copies the login-site of a legit Hotspot and adapts his Hotspot in order to show the same site, he won't just be able to obtain the users credentials, he will also be capable of implementing malware into that site to gain access to the victim's personal device. Now that the attacker has gained access, he can start sniffing around and will possibly find out that a VPN application is being executed. If the attacker finds a proper application, he can start to use the victim's device to access the internal structure of the corporate network;the device now serves as a router for the attacker. Security mechanisms like firewalls and IDS, which are normally used as perimeter protection, won't be able to detect the attacker because he uses legitimate communication tunnels to get

关键词： Internet Control systems Network security Computer security Data communications Java multimedia Applied sciences Imaging systems Mobile devices

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MoCA workbench: Support for creativity in movie content analysis

MoCA workbench: Support for creativity in movie content anal...

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Proceedings of the 1996 International Conference on multimedia Computing and systems

作者： Lienhart, Rainer Pfeiffer, Silvia Effelsberg, Wolfgang Univ of Mannheim Mannheim Germany

Semantic access to the content of a video is highly desirable for multimedia content retrieval. Automatic extraction of semantics requires content analysis algorithms. Our MoCA (Movie content Analysis) project provides an interactive workbench supporting the researcher in the development of new movie content analysis algorithms. The workbench offers data management facilities for large amounts of video/audio data and derived parameters. It also provides an easy-to-use interface for a free combination of basic operators into more sophisticated operators. We can combine results from video track and audio track analysis. The MoCA Workbench shields the researcher from technical details and provides advanced visualization capabilities, allowing attention to focus on the development of new algorithms. The paper presents the design and implementation of the MoCA Workbench and reports practical experience.

关键词： Video signal processing

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