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conference on multimedia systems and Applications IV

作者： Ratnakar, V Guleryuz, OG Epson Palo Alto Lab Palo Alto CA 94304 USA

ISBN: (纸本)0819442429

We present standards-compliant visible watermarking schemes for digital images and video in DCT-based compressed formats. The watermarked data is in the same compressed format as the original and can be viewed with standard tools and applications. Moreover, for most of the schemes presented, the watermarked data has exactly the same compressed size as the original. The watermark can be inserted and removed using a key for applications requiring content protection. The watermark application and removal algorithms are very efficient and exploit some features of compressed data formats (such as JPEG and MPEG) which allow most of the work to be done in the compressed domain.

关键词： visible watermarks scrambler discrete cosine transform JPEG MPEG content protection

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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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A study of low-complexity tools for semantic classification of mobile video

A study of low-complexity tools for semantic classification ...

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conference on multimedia on Mobile Devices ii

作者： Mariappan, A Igarta, M Taskiran, C Gandhi, B Delp, EJ Purdue Univ Video & Image Proc Lab VIPER Sch Elect & Comp Engn W Lafayette IN 47907 USA Motorola Labs Multimedia Res Lab Schaumburg IL USA

ISBN: (纸本)0819461148

With the proliferation of cameras in handheld devices that allows users to capture still images and videos, providing users with software tools to efficiently manage multimedia content has become essential. In many cases users desire to organize their personal media content using high-level semantic labels. In this paper we will describe low-complexity algorithms that can be used to derive semantic labels, such as "indoor/outdoor," "face/not face," and "motion/not motion" for mobile video sequences. We will also describe a method for summarizing mobile video sequences. We demonstrate the classification performance of the methods and their computational complexity using a typical processor used in many mobile terminals.

关键词： Video Skin Databases Facial recognition systems Semantic video Classification systems Image classification multimedia Binary data RGB color model

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Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

Proceedings of the 1998 Conference on Electronic Imaging and...

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Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

The proceedings contains 61 papers from the SPIE International Society for Optical Engineering Journal on Electronic Imaging and multimedia systems ii. Topics discussed include: image retrievals;gray image recognition;content-based image retrieval;color pattern selections;video segmentations;declarative video data retrieval languages;network databases;fast spatial transformations;moving object segmentation methods;anisotropic segmentations;video segmentation algorithms;wavelet-derived gradient computations;dual-band imaging systems;genetic algorithms;thermal image compression systems;multimedia-on-demand services;personal digital assistant (PDA) systems;and real-time nonlinear video authoring systems.

关键词： Image processing

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Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

Proceedings of the 1998 Conference on Electronic Imaging and...

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Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

关键词： Image processing

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Hierarchical temporal video segmentation and content characterization

Hierarchical temporal video segmentation and content charact...

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conference on multimedia Storage and Archiving systems ii

作者： Gunsel, B Fu, Y Tekalp, AM Univ. of Rochester (United States)

ISBN: (纸本)0819426628

This paper addresses the segmentation of a video sequence into shots, specification of edit effects and subsequent characterization of shots in terms of color and motion content. The proposed scheme uses DC images extracted from MPEG compressed video and performs an unsupervised clustering for the extraction of camera shots. The specification of edit effects, such as fade-in/out and dissolve is based on the analysis of distribution of mean value for the luminance components. This step is followed by the representation of visual content of temporal segments in terms of key frames selected by similarity analysis of mean color histograms. For characterization of the similar temporal segments, motion and color characteristics are classified into different categories using a set of different features derived from motion vectors of triangular meshes and mean histograms of video shots.

关键词： video databases content-based access shot detection edit effects content characterization

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Optimimal resources utilization for indexing within a distributed multimedia retrieval system: An implementation for a video surveillance use case 18

Optimimal resources utilization for indexing within a distri...

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18th International conference on Distributed multimedia systems, DMS 2012

作者： Codreanu, Dana Manzat, Ana-Maria Sedes, Florence Université de Toulouse IRIT UMR 5505 Toulouse31062 France

ISBN: (纸本)1891706322

Effective and flexible solutions for enabling reduced resource consumption and handling content and associated processing (indexing algorithms) diversity (in terms of location, technical characteristics, execution constraints, requested features) are essential in multimedia management systems. In this paper we present a distributed multimedia retrieval system that enables efficient and effective content processing and access. Though the system’s architecture is a generic one, in order to explain system’s functionalities we will present an instance of the architecture for a video surveillance use case. The proposed system addresses all important topic research concerning this type of systems (architecture, indexing, query) and proposes a novel two steps indexing approach (at acquisition time: implicit indexing and at query time: explicit indexing). We also present in this article how the user access management is done. © 2012 by Knowledge systems Institute Graduate School.

关键词： Indexing (of information)

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Media and metadata management for capture and access systems in electronic lecturing environments

Media and metadata management for capture and access systems...

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4th International conference on multimedia and Expo (ICME 2003)

作者： Stewart, A Wolf, P Hemmje, M Fraunhofer IPSI Darmstadt Germany

ISBN: (纸本)0780379659

One of the main challenges facing web-based multimedia content creators today is the development of cost-effective digital media content for courseware that is reusable and interoperable. Given this, we propose the design and implementation of a model to manage the multimedia and meta-data within a system of related topics in a course that is delivered via electronic lectures. This model not only supports the re-purposing and interchange of a course's digital media content, but also preserves the semantic dependencies and associated media-mapping, of pre-requisite and co-requisite knowledge within a course. Coarse grain or topic-based segmentations of an electronic lecture are used as building blocks to automatically create new, media-rich, electronic lecture experiences of interest to a user and subject to the constraints imposed by the model.

关键词： Digital storage

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Dual watermarking framework for privacy protection and content authentication of multimedia

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FUTURE GENERATION COMPUTER systems-THE INTERNATIONAL JOURNAL OF ESCIENCE 2019年 94卷 654-673页

作者： Hurrah, Nasir N. Parah, Shabir A. Loan, Nazir A. Sheikh, Javaid A. Elhoseny, Mohammad Muhammad, Khan Univ Kashmir Post Grad Dept Elect & Instrumentat Technol Srinagar 190006 Jammu & Kashmir India Mansoura Univ Fac Comp & Informat El Gomhouria St Mansoura 35516 Egypt Sejong Univ Digital Contents Res Inst Intelligent Media Lab Seoul South Korea

In the current multimedia networked infrastructure, privacy breaches due to cyber-attacks result in huge economic losses. Despite these threats there is ever increasing demand to share data over various insecure networks for accomplishment of numerous tasks. In such a scenario there is a greater need to develop new algorithms for strengthening the existing cybersecurity frameworks, ensure security, privacy, copyright protection and authentication of data. In this paper a new technique for copyright protection, data security and content authentication of multimedia images is presented. The copyright protection of the media is taken care of by embedding a robust watermark using an efficient inter-block coefficient differencing algorithm and is proposed as Scheme I. Scheme ii has been utilized to ensure both copyright protection, and content authentication. The authentication of the content has been ensured by embedding a fragile watermark in spatial domain while as copyright protection has been taken care of utilizing a robust watermark. In order to thwart an adversary and ensure that it has no access to actual embedded data, we make use of a novel encryption algorithm in conjunction with Arnold transform to encrypt data prior to its embedding. The experimental results reveal that the proposed framework offers high degree of robustness against single/dual/triple attacks;with Normalized Correlation (NCC), more than or equal to 0.95. Besides, the fragile watermark embedding makes the system capable of tamper detection and localization with average BER more than 45% for all signal processing/geometric attacks. The average PSNR achieved for both schemes is greater than 41 dB. A comparison of the proposed framework with various state-of-the-art techniques demonstrate its effectiveness and superiority. (C) 2018 Elsevier B.V. All rights reserved.

关键词： multimedia security Cyber-attack Cybersecurity Robustness Copyright protection content authentication

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Summarizing multimedia content 17th

Summarizing Multimedia Content

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17th International conference on Web Information systems Engineering (WISE)

作者： Modani, Natwar Maneriker, Pranav Hiranandani, Gaurush Sinha, Atanu R. Utpal Subramanian, Vaishnavi Gupta, Shivani Adobe Res BigData Experience Lab Bangalore Karnataka India Adobe India Noida India

ISBN: (纸本)9783319487434;9783319487427

Today multimedia content comprising both text and images is growing at a rapid pace. There has been a body of work to summarize text content, but to the best of our knowledge, no method has been developed to summarize multimedia content. We propose two methods for summarizing multimedia content. Our novel approach explicitly recognizes two desirable, normative characteristics of a summary - good coverage and diversity of the respective text and images, and that text and images should be coherent with each other. Two methods are examined - graph based and a modification to the submodular approach. Moreover, we propose a metric to measure the quality of a multimedia summary which captures coverage and diversity of text and images as well as coherence between the text and images in the summary. We experimentally demonstrate that the proposed methods achieve good quality multimedia summaries.

关键词： Summarization Text and images multimedia content algorithms

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