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Efficient Indexing and storage Algorithm for visual databases

Efficient Indexing and Storage Algorithm for Visual Database...

引用

International conference on Information Technology: New Generations (ITNG)

作者： Mark Smith Alireza Khotanzad Department of Electrical Engineering Southern Methodist University Dallas TX USA

A novel approach pertaining to the fast and efficient retrieval and storage of video sequences utilizing MPEG-1/2 motion vectors is presented in this paper. A clip first must be segmented into consistent video segments based on the basic editing effects - cuts, dissolves, and wipes. All group of pictures (GOPs) are then extracted from the clip and decomposed further into I-frames and P-frames (B-frames are disregarded). The initial frame of the sequence is manually segmented into objects, and the selected objects are automatically tracked through the entire sequence using MPEG-1/2 motion vectors. Features pertaining to the edge histogram are extracted from each tracked object (I/P frames only) and then maintained with the associated frame. An example image or video clip is then presented to the system and the 5 best matching images are retrieved. Results are shown for the standard video sequences such as foreman, tennis, etc.

关键词： Indexing visual databases image segmentation image coding video compression Spatial databases Transform coding Information retrieval video sequences image databases

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A generic annotation model for video databases 3rd

A generic annotation model for video databases

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3rd International conference on visual Information Systems, vISUAL 1999

作者： Rehatschek, Herwig Müller, Heimo Institute of Information Systems JOANNEUM RESEARCH Steyrergasse 17 GrazA-8010 Austria Word and Image studies Vrije Universiteit Amsterdam de Boelelaan 1105 Amsterdam1081 HV Netherlands

ISBN: (纸本)3540660798

The change from analogue broadcasting to digital MPEG-2 channels among the satellite programs resulted in new demands on video databases and archives. Digital archives offer on the one hand a reduction of storage costs, and enable on the other hand easy reuse of already existing material. However, searching for appropriate film material in large archives is still a tedious problem. This paper describes a generic annotation model for MPEG movies which enables the user to structure the film in as many hierarchical levels as needed and to annotate any physical or logical part of the film with generic definable attributes. The model was implemented in prototype system which additionally offers a query and ordering facility per web browser and Internet. © Springer-verlag Berlin Heidelberg 1999.

关键词： video recording

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ARHON: A multimedia database design for image documents 9

ARHON: A multimedia database design for image documents

引用

9th European Signal Processing conference, EUSIPCO 1998

作者： Chandrinos, K.v. Irmnerkarr, J. Trahanias, P.E. Institute of Computer Science FORTH. P.O. Box 1385 Heraklion Crete71 110. Greece

In this paper we present the design and initial implementation of a multimedia system for historical documents. The system, currently under development at FORTH, will be used bv the vikelea Municipal Library of archives at Ileraklion, Crete. The material consist s of historical documents that need to be digitized, indexed and continuously annotated by scholars so that the value of the archive will increase by its use. We present the design architecture and initial implementation of a client- server model for the creation, maintenance and use of such a digital archive. Also, we present a technique for marking-up different media to provide rapid entering of semantic information The user can interactively markup parts of the representation 011 the medium of choice (e.g. areas 011 a document image) and associate local information with text, images, sound-clips, video or subparts of them without altering the original. The output is XML files that can be parsed by viewers to navigate through the semantic information or used by search agents to refine the accuracy of retrieval in a query. For demonstration purposes we present LmageTagger, a prototype for document image tagging. Developing in .Java allows for net-centric administration and use of a number of heterogenous databases through standard Internet browsers.

关键词： Multimedia systems

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Fast polynomial regression transform for video database

引用

IEEE International conference on image Processing

作者： K.J. Han A.H. Tewfik Department of Electrical and Computer Engineering University of Minnesota MN USA

ISBN: (纸本)0818688211

Important issues in multimedia information systems are the development of efficient storage layout models and effective retrieval system to manage multimedia databases. In multimedia information systems, the capability for interaction with video media type is still extremely limited due to a huge amount of video databases. We present the Fast Polynomial Regression Transform (FPRT) based metadata scheme for manipulating the large video database in the paper. This new metadata scheme provides the simplification of the query mechanism and the improvement of communication in multimedia systems. The main advantage of the proposed approach is the reduction of the data storage space while preserving much video content information. Other advantages are computational simplicity for video information coding and accuracy for video indexing. visual tools for video representation and browsing are also presented.

关键词： Polynomials Multimedia databases Multimedia systems Information retrieval video compression Management information systems Streaming media Space technology Indexing image segmentation

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Experience of Animate Similarity Concepts in Multimedia Database

Experience of Animate Similarity Concepts in Multimedia Data...

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International conference on Data Engineering Workshops

作者： M. Albanese A. Chianese v. Moscato A. Picariello Dipartimento di Informatica e Sistemistica University of Naples Federico II Naples Italy

This paper describes and reports an experience related to several applications of the Animate vision Paradigm to query processing and indexing in multimedia databases. In particular we show as two main problems related to video and image databases may be usefully advantaged by an Animate image Similarity model, namely the video segmentation problem and the image retrieval task in a Query By Example environment.

关键词： Animation Multimedia databases image retrieval image databases image segmentation Indexing Information retrieval Biological system modeling image analysis Humans

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vORTEX: video retrieval and tracking from compressed multimedia databases-visual search engine

VORTEX: Video retrieval and tracking from compressed multime...

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Annual Hawaii International conference on System Sciences (HICSS)

作者： D. Schonfeld D. Lelescu EECS Department University of Illinois Urbana-Champaign Chicago IL USA

Multimedia data is generally stored in compressed form in order to efficiently utilize the available storage facilities. Access to archives is dependent on our ability to browse compressed multimedia information-retrieval and tracking from coded video databases. In this paper, a novel visual search engine for video retrieval and tracking from compressed multimedia databases is proposed. The goal of the project is the implementation of a visual browser that operates in a distributed environment where users initiate video searches and retrieve relevant video information simultaneously from multiple video archives. Being presented with a query in the form of template images of objects, the system operates on the compressed video to find the images or video sequences where those objects are present and their positions in the image. Upon user's request, the system will decompress and display only the video sequences of interest.

关键词： Multimedia databases video compression Information retrieval Search engines videoconference image coding Transform coding Electronic mail visual databases Displays

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Candela-storage, Analysis and retrieval of video Content in Distributed Systems: Real-Time video Surveillance and retrieval

Candela-Storage, Analysis and Retrieval of Video Content in ...

引用

IEEE International conference on Multimedia and Expo (ICME)

作者： E.G.T. Jaspers R.G.J. Wijnhoven A.H.R. Albers X. Desurmont M. Barais J. Hamaide B. Lienard Bosch Security Systems Netherlands Multitel Parc Initialis Mons Belgium Vrije Universiteit Brussel Brussels Belgium

Although many different types of technologies for information systems have evolved over the last decades (such as databases, video systems, the Internet and mobile telecommunication), the integration of these technologies is just in its infancy and has the potential to introduce "intelligent" systems. This paper describes the novelties of a video content analysis in a surveillance system, demonstrating the benefits for fast retrieval in huge video databases

关键词： Content based retrieval Real time systems video surveillance databases Algorithm design and analysis image analysis Data security Information security Information retrieval Computer vision

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Dimensionality reduction for similarity searching in dynamic databases

Dimensionality reduction for similarity searching in dynamic...

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Proceedings of the ACM SIGMOD International conference on Management of Data

作者： Kanth, K.v.Ravi Agrawal, Divyakant Singh, Ambuj Univ of California at Santa Barbara Santa Barbara United States

databases are increasingly being used to store multi-media objects such as maps, images, audio and video. storage and retrieval of these objects is accomplished using multi-dimensional index structures such as R*-trees and SS-trees. As dimensionality increases, query performance in these index structures degrades. This phenomenon, generally referred to as the dimensionality curse, can be circumvented by reducing the dimensionality of the data. Such a reduction is however accompanied by a loss of precision of query results. Current techniques such as QBIC use SvD transform-based dimensionality reduction to ensure high query precision. The drawback of this approach is that SvD is expensive to compute, and therefore not readily applicable to dynamic databases. In this paper, we propose novel techniques for performing SvD-based dimensionality reduction in dynamic databases. When the data distribution changes considerably so as to degrade query precision, we recompute the SvD transform and incorporate it in the existing index structure. For recomputing the SvD-transform, we propose a novel technique that uses aggregate data from the existing index rather than the entire data. This technique reduces the SvD-computation time without compromising query precision. We then explore efficient ways to incorporate the recomputed SvD-transform in the existing index structure without degrading subsequent query response times. These techniques reduce the computation time by a factor of 20 in experiments on color and texture image vectors. The error due to approximate computation of SvD is less than 10%.

关键词： Distributed database systems

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Fast video segmentation using encoding cost data

Fast video segmentation using encoding cost data

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Proceedings of the 1999 7th conference of the storage and retrieval for image and video databases vII

作者： De Queiroz, Ricardo L. Bozdagi, Gozde Sencar, Taha Xerox Corp Webster NY United States

This paper presents a simple and effective pre-processing method developed for the segmentation of MPEG compressed video sequences. The proposed method for scene-cut detection only involves computing the number of bits spent for each frame (encoding cost data), thus avoiding decoding the bitstream. The information is separated into I-, P-, B-frames, thus forming 3 vectors which are independently processed by a new peak detection algorithm based on overcomplete filter banks and on joint thresholding using a confidence number. Each processed vector yields a set of candidate frame numbers, i.e. 'hints' of positions where scene-cuts may have occurred. The 'hints' for all frame types are recombined into one frame sequence and clustered into scene cuts. The algorithm was not designed to distintuish among types of cuts but rather to indicate its position and duration. Experimental results show that the proposed algorithm is effective in detecting abrupt scene changes as well as gradual transitions. For precision demanding applications, the algorithm can be used with a low confidence factor just to select the frames that are worth being investigated by a more complex algorithm. The algorithm is not particularly tailored to MPEG and can be applied to most video compression techniques.

关键词： image segmentation

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On the content predictability of cooperative image caching in ad hoc networks 06

On the content predictability of cooperative image caching i...

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7th International conference on Mobile Data Management, 2006. MDM 2006

作者： Bo, Yang Hurson, Ali R. Yu, Jiao Department of Computer Science and Engineering Pennsylvania State University University Park PA 16802-6106 United States

ISBN: (纸本)0769525261

Emerging applications of mobile data management, such as content-based image retrieval in ad hoc networks, require the awareness of content distribution to enact and optimize the communication and search tasks. Caching is a widely used approach in mobile environments to improve system performance and keep track of replications. Within the scope of mobile and ubiquitous computing infrastructure, traditional caching techniques are not effective for large-size data such as images due to the limitations of bandwidth, storage, and power. The functionality of caching techniques relies on exact match, making them unsuitable for imprecise and similarity-based queries. In addition, the description of cached contents is defined based on the query context instead of data content, which fails to exploit the semantic locality of cached data and makes the traditional caching techniques inefficient in utilizing cache storage. In this paper, we present a semantic-aware caching scheme (SAIC) for image databases in ad hoc networks. The proposed scheme is designed based on several novel ideas: 1) multi-level partitioning of semantic space, 2) constraint-based representation of image semantics, 3) non-flooding query resolution, and 4) adaptive cache consistency maintenance. Our combination of theoretical analysis and simulation show the efficiency of the proposed scheme, and evaluate its performance in comparison against two ad hoc caching schemes as advanced in the literature. © 2006 IEEE.

关键词： Telecommunication networks

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