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2000 ACM Workshops on multimedia, multimedia 2000

作者： Ioannou, S. Moschovitis, G. Ntalianis, K. Karpouzis, K. Kollias, S. Image Video and Multimedia Laboratory Electrical and Computer Engineering Department National Technical University of Athens Heroon Polytechniou 9 Athens157 80 Greece

ISBN: (纸本)9781581133110

Current multimedia databases contain a wealth of information in the form of audiovisual, as well as text data. Even though efficient search algorithms have been developed for either media, there still exists the need for abstract presentation and summarization of the results of database users' queries. Moreover, multimedia retrieval systems should be capable of providing the user with additional information related to the specific subject of the query, as well as suggest other topics which users with a similar profile are interested in. In this paper, we present a number of solutions to these issues, giving as an example an integrated architecture we have developed, along with notions that support efficient and secure Internet access and easy addition of new material. Segmentation of the video in shots is followed by shot classification in a number of predetermined categories. Generation of users' profiles according to the same categories, enhanced by relevance feedback, permits an efficient presentation of the retrieved video shots or characteristic frames in terms of the user interest in them. Moreover, this clustering scheme assists the notion of "lateral" links that enable the user to continue retrieval with data of similar nature or content to those already returned. Furthermore, user groups are formed and modeled by registering actual preferences and practices;this enables the system to "predict" information that is possibly relevant to specific users and present it along with the returned results. The concepts utilized in this system can be smoothly integrated in MPEG-7 compatible multimedia database systems. Copyright © ACM 2000.

关键词： Abstracting

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Intelligent Digital Signage System Based on Gender Identification

Intelligent Digital Signage System Based on Gender Identific...

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Symposium-B on Intelligent Embedded systems / 1st International Conference on NextGen Electronic Technologies - Silicon to Software (ICNETS2)

作者： Abraham, Riya Elizabeth Kennedy, M. Robert VIT Univ Sch Elect Engn Chennai Tamil Nadu India Qmax Syst India P Ltd Chennai Tamil Nadu India

ISBN: (纸本)9789811085758;9789811085741

This paper proposes an intelligent transformation of digital signage systems by making it more audience interactive. The increase in flexibility and enhancement of digital signage display system can be done by providing optimized information and appearance attractive multimedia content through the signage system. This emphasizes more on the advertisement industry especially in public spaces like hotels, airports. The system has been designed to broadcast the advertisement on the signage display system based on the demographic features like gender of the observer. Real-time computer vision algorithms are applied to provide an observer-specific advertisement broadcast on the display system.

关键词： FERET database Demographic features content management Prediction model

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Feature representation and compression for content-based retrieval

Feature representation and compression for content-based ret...

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Conference on Visual Communications and Image Processing 2001

作者： Xie, H Ortega, A Univ So Calif Dept Elect Engn Syst Integrated Media Syst Ctr Los Angeles CA 90089 USA

ISBN: (纸本)0819439886

In semantic content-based image/video browsing and navigation systems, efficient mechanisms to represent and manage a large collection of digital images/videos are needed. Traditional keyword-based indexing describes the content of multimedia data through annotations such as text or keywords extracted manually by the user from a controlled vocabulary This textual indexing technique lacks the flexibility of satisfying various kinds of queries requested by database users and also requires huge amount of work for updating the information. Current content-based retrieval systems often extract a set of features such as color, texture, shape motion, speed, and position from the raw multimedia data automatically and store them as content descriptors. This content-based metadata differs from text-based metadata in that it supports wider varieties of queries and can be extracted automatically, thus providing a promising approach for efficient database access and management. When the raw data volume grows very large, explicitly extracting the content-information and storing it as metadata along with the images will improve querying performance since metadata requires much less storage than the raw image data and thus will be easier to manipulate. In this paper we maintain that storing metadata together with images will enable effective information management and efficient remote query. We also show, using a texture classification example, that this side information can be compressed while guaranteeing that the desired query accuracy is satisfied. We argue that the compact representation of the image contents not only reduces significantly the storage and transmission rate requirement, but also facilitates certain types of queries. algorithms are developed for optimized compression of this texture feature metadata given that tile goal is to maximize tile classification performance for a given rate budget.

关键词： metadata content-based retrieval texture classification compression bit allocation

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HIT-DML: A novel Digital Music Library

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6th International Conference on Asian Digital Libraries

作者： Wang, CK Li, JZ Shi, SF Harbin Inst Technol Dept Comp Sci & Engn Harbin Heilongjiang Peoples R China

ISBN: (纸本)3540206086

The design and implementation of Harbin Institute of Technology-Digital Music Library (HIT-DML) is presented in this paper. HIT-DML adopts a novel framework which is inherently based on database systems. In this framework, musical data is structurally stored in the database, some algorithms of musical computation are implemented as algebraic mirco-operations in the database management system, and thus database technologies and multimedia technologies are combined seamlessly. A musical feature-matching algorithm and the appropriate dynamic index are also applied in HIT-DML. HIT-DML can retrieve musical information based on content, especially against different kinds of musical instruments.

关键词： Digital Music Library content-based music information retrieval

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multimedia enriched ontologies for video digital libraries

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INTERNATIONAL JOURNAL OF PARALLEL EMERGENT AND DISTRIBUTED systems 2007年第6期22卷 407-416页

作者： Bertini, Marco Del Bimbo, Alberto Torniai, Carlo Univ Firenze Florence Italy

The development of appropriate tools and solutions to support effective access to video content is one of the main challenges for video digital libraries. Different techniques for manual and automatic annotation and retrieval have been proposed in recent years. It is a common practice to use linguistic ontologies for video annotation and retrieval: video elements are classified by establishing relationships between video contents and linguistic terms that identify domain concepts at different abstraction levels. However, although linguistic terms are appropriate to distinguish event and object categories, they are inadequate when they must describe specific or complex patterns of events or video entities. Instead, in these cases, pattern specifications can be better expressed using visual prototypes, either images or video clips, that capture the essence of the event or entity. High level concepts, expressed trough linguistic terms, and patterns specification, represented by visual prototypes, can be both organized into new extended ontologies where images or video clips are added to the ontologies as specification of linguistic terms. This paper presents algorithms and techniques that employ enriched ontologies for video annotation and retrieval, and discusses a solution for their implementation for the soccer video domain. An unsupervised clustering method is proposed in order to create multimedia enriched ontologies by defining visual prototypes that represent specific patterns of highlights and adding them as visual concepts to the ontology. An algorithm that uses multimedia enriched ontologies to perform automatic soccer video annotation is proposed and results for typical highlights are presented. Annotation is performed associating occurrences of events, or entities, to higher level concepts by checking their similarity to visual concepts that are hierarchically linked to higher level semantics, using a dynamic programming approach. Usage of reasoning on the

关键词： Video Algorithm Annotation Ontology

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Extending TINA with secure on-line accounting services

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Journal of Network and systems Management 2003年第4期11卷 379-397页

作者： Westphall, Carlos Becker Sekkaki, Abderrahim Alvarez, Luis Marco Cáceres Watanabe, Wagner Tatsuya P.-Grad. Prog. in Computer Science Technological Center Federal University of Santa Catarina Caixa Postal 476 88040-970 Florianopolis SC Brazil Department of Mathematics Faculty of Science - Ain Chock Hassan II University Casablanca Morocco

Concepts and principles of TINA (Telecommunications Information Networking Architecture) are introduced with the objective of correcting problems of the current centralized service control and service data model in an IN (Intelligent Network). It is becoming increasingly clear that the future sophisticated telecommunication services, e.g., multimedia, and multi-party conferencing, breaking away from the traditional telephony call model will need the solutions for rapid and efficient introduction, deployment, operations, and management. In this paper, we discuss accounting features and requirements, as well as security services in the TINA management context. We will introduce and present an implementation of a model for a security management, based on secure objects, cryptography and certificate distribution. In order to provide secure services, secure objects that have security functionality, such as authentication and access control, have been defined. Secure objects in our model are CORBA objects. The security domain is also called SBS (Security Base Server), provides security services and has an SMIB (Security Management Information Base) that contains security policies, cryptographic algorithms, and other relevant information. A prototype has been implemented and some experimental results are presented.

关键词： Online systems

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Efficient content-based indexing of large image databases

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ACM TRANSACTIONS ON INFORMATION systems 2000年第2期18卷 171-210页

作者： El-Kwae, EA Kabuka, MR Univ N Carolina Dept Comp Sci Charlotte NC 28223 USA Univ Miami Dept Elect & Comp Engn Coral Gables FL 33146 USA

Large image databases have emerged in various applications in recent years. A prime requisite of these databases is the means by which their contents can be indexed and retrieved. A multilevel signature file called the Two Signature Multi-Level Signature File (2SMLSF) is introduced as an efficient access structure for large image databases. The 2SMLSF encodes image information into binary signatures and creates a tree structure that can be efficiently searched to satisfy a user's query. Two types of signatures are generated. Type I signatures are used at all tree levels except the leaf level and are based only on the domain objects included in the image. Type ii signatures, on the other hand, are stored at the leaf level and are based on the included domain objects and their spatial relationships. The 2SMLSF was compared analytically to existing signature file techniques. The 2SMLSF significantly reduces the storage requirements;the index structure can answer more queries;and the 2SMLSF performance significantly improves over current techniques. Both storage reduction and performance improvement increase with the number of objects per image and the number of images in the database. For an example large image databases, a storage reduction of 78% may be achieved while the performance improvement may reach 98%.

关键词： content analysis and indexing document managing image databases index generation multimedia databases

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On the management of aggregation networks with rapidly moving traffic demands

On the management of aggregation networks with rapidly movin...

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9th IFIP/IEEE International Symposium on Integrated Network Management (IM 2005)

作者： Van Quickenborne, F De Greve, F State Univ Ghent Dept Informat Technol INTEC B-9000 Ghent Belgium

ISBN: (纸本)0780390873

In this paper, the focus is on the management aspects for delivery of multimedia services to fast moving users (e.g., users in trains, cars or airplanes). The considered network architecture consists of two parts: an aggregation network part and an access network part. We designed a management system for the aggregation network. The main functionalities of this management system are: (i) pre-configuration of the QoS (Quality of Service) tunnels, based on the results of the network capacity planning process, (ii) activation of the QoS tunnels when required and (iii) tunnel reconfiguration when the activated tunnels are unsufficient to carry the instantaneous demand or in case of other failures. The main difference with existing management systems is that it is designed to deal with the rapidly moving nature of the traffic conditions and the generation of triggers for tunnel activations or reconfigurations. The management system focuses on multimedia service delivery to trains through high speed Ethernet aggregation networks. An extended GVRP (GARP (Generic Attribute Registration Protocol) VLAN Registration Protocol) and a new GARP protocol (G2RP) were designed and implemented as protocols for the automatic tunnel pre-configuration and activation, respectively. The management system makes use of optimization algorithms for network dimensioning and tunnel path determination. These algorithms will be described in detail and their evaluation results will be compared for a basic train scenario. Finally, measurement results on the performance of the designed protocols for tunnel pre-configuration and activation, are presented in detail.

关键词： multimedia traffic dimensioning optimization tunnel management GVRP G2RP

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Aligning Textual & Visual Data: Towards Scalable multimedia Retrieval

Aligning Textual & Visual Data: Towards Scalable Multimedia ...

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作者： Pramod Sankar Kompalli International Institute of Information Technology Hyderabad

学位级别：博士

The search and retrieval of relevant images and videos from large repositories of mul- timedia, is acknowledged as one of the hard challenges of computer science. With exist- ing pattern recognition solutions, one cannot obtain detailed, semantic description for a given multimedia document. Several limitations exist in feature extraction, classification schemes, along with the incompatibility of representations across domains. The situation will most likely remain so, for several years to come. Towards addressing this challenge, we observe that several multimedia collections con- tain similar parallel information that are: i) semantic in nature, ii) weakly aligned with the multimedia and iii) available freely. For example, the content of a news broadcast is also available in the form of newspaper articles. If a correspondence could be obtained between the videos and such parallel information, one could access one medium using the other, which opens up immense possibilities for information extraction and retrieval. However, it is challenging to find the mapping between the two sources of data due to the unknown semantic hierarchy within each medium and the difficulty to match information across the different modalities. In this thesis, we propose novel algorithms that address these challenges. Different < multimedia, P arallel Information > pairs, require different alignment techniques, depending on the granularity at which entities could be matched across them. We choose four pairs of multimedia, along with parallel information obtained in the text domain, such that the data is both challenging and available on a large scale. Specifically, our multimedia consists of movies, broadcast sports videos and document images, with the parallel text coming from scripts, commentaries and language resources. As we proceed from one pair to the next, we discover an increasing complexity of the problem, due to a relaxation of the temporal binding between the parallel information

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A distortion-minimizing rate controller for wireless multimedia sensor networks

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COMPUTER COMMUNICATIONS 2010年第12期33卷 1380-1390页

作者： Pudlewski, Scott Melodia, Tommaso SUNY Buffalo Dept Elect Engn Wireless Networks & Embedded Syst Lab Buffalo NY 14260 USA

The availability of inexpensive CMOS cameras and microphones that can ubiquitously capture multimedia content from the environment is fostering the development of wireless multimedia sensor networks (WMSNs), i.e., distributed systems of wirelessly networked devices that can retrieve video and audio streams, still images, and scalar sensor data. A new cross-layer rate control scheme for WMSNs is introduced in this paper with a twofold objective: (i) maximize the video quality of each individual video stream;(ii) maintain fairness in the domain of video quality between different video streams. The rate control scheme is based on analytical and empirical models of video distortion and consists of a new cross-layer control algorithm that jointly regulates the end-to-end data rate, the video quality, and the strength of the channel coding at the physical layer. The end-to-end data rate is regulated to avoid congestion while maintaining fairness in the domain of video quality rather than data rate. Once the end-to-end data rate has been determined, the sender adjusts the video encoder rate and the channel encoder rate based on the overall rate and the current channel quality, with the objective of minimizing the distortion of the received video. Simulations show that the proposed algorithm considerably improves the received video quality with respect to state-of-the art rate control algorithms, without sacrificing on fairness. (C) 2010 Elsevier B.V. All rights reserved.

关键词： multimedia sensor networks Cross-layer design Rate control

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