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Media-independent knowledge representation via UMART: unified mental annotation and retrieval tool

Media-independent knowledge representation via UMART: unifie...

引用

storage and retrieval for still image and video databases iv

作者： Smith, Roger W. Kieronska, Dorota H. Venkatesh, Svetha Curtin Univ. Perth WA Aust

ISBN: (纸本)0819420441

Multimedia information is now routinely available in the forms of text, pictures, animation and sound. Although text objects are relatively easy to deal with (in terms of information search and retrieval), other information bearing objects (such as sound, images, animation) are more difficult to index. Our research is aimed at developing better ways of representing multimedia objects by using a conceptual representation based on Schank's conceptual dependencies. Moreover, the representation allows for users' individual interpretations to be embedded in the system. This will alleviate the problems associated with traditional semantic networks by allowing for coexistence of multiple views of the same information. The viability of the approach is tested, and the preliminary results reported.

关键词： Knowledge representation

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Using the triangle inequality to reduce the number of comparisons required for similarity-based retrieval

Using the triangle inequality to reduce the number of compar...

引用

storage and retrieval for still image and video databases iv

作者： Barros, Julio E. French, James C. Martin, Worthy N. Kelly, Patrick M. Cannon, T.Michael Univ. of Virginia and Los Alamos Natl. Lab. Los Alamos NM USA

ISBN: (纸本)0819420441

Dissimilarity measures, the basis of similarity-based retrieval, can be viewed as a distance and a similarity-based search as a nearest neighbor search. Though there has been extensive research on data structures and search methods to support nearest-neighbor searching, these indexing and dimension-reduction methods are generally not applicable to non-coordinate data and non-Euclidean distance measures. In this paper we reexamine and extend previous work of other researchers on best match searching based on the triangle inequality. These methods can be used to organize both non-coordinate data and non-Euclidean metric similarity measures. The effectiveness of the indexes depends on the actual dimensionality of the feature set, data, and similarity metric used. We show that these methods provide significant performance improvements and may be of practical value in real-world databases.

关键词： Information retrieval systems

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Interactive classification and indexing of still and motion pictures in videoRoadMap

Interactive classification and indexing of still and motion ...

引用

conference on Multimedia storage and Archiving Systems III

作者： Park, YC Golshani, F Panchanathan, S Candan, KS Arizona State Univ Dept Comp Sci & Engn Tempe AZ 85287 USA

ISBN: (纸本)0819429880

The large scale proliferation of multimedia data necessitates the use of sophisticated techniques for accessing the information based on the content. videoRoadMap is a new content-based video indexing system for retrieving video clips and images from multimedia databases. The system indexes the audio-visual information using spatio-temporal features and information modeling methods. The proposed system employs adaptive similarity measurements based on the contents of media objects, resulting in more accurate retrievals. Principal component analysis and second order statistical analysis are employed to determine the appropriate combination of weight values in similarity search. In addition, videoRoadMap includes a powerful multi-faceted querying mechanism which allows queries to be formulated and presented in a variety of modes, including query by example (image and/or video), query by sketch, and query by object motion trajectory.

关键词： content-based multimedia object retrieval subjectivity modeling audio-visual information analysis

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Visual computing meets data modeling: defining objects in multicamera video databases

Visual computing meets data modeling: defining objects in mu...

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storage and retrieval for still image and video databases iv

作者： Kelly, Patrick H. Gupta, Amarnath Jain, Ramesh C. Univ. of California/San Diego La Jolla CA USA

ISBN: (纸本)0819420441

To the end-user of a video database, content consists of objects and events occurring in the video. A video database system must be designed to extract, represent and organize this information in a fashion that supports querying, manipulation and data visualization by a user. As a data modeling exercise, objects and events are defined in terms of semantic attributes such that an end-user's queries are expressible through the modeling language. On the other hand, as a feature extraction exercise, objects are defined as solutions to equations, often in terms of low-level visual primitives like voxels or contours. These two formalisms constitute entirely different languages. However, integration of these two approaches can provide a powerful mechanism for description and manipulation of complex visual data. This paper explores issues involved with this integration. We introduce the notion of a visual data modeling language (VDML), which supports data definition and data manipulation operations over complex visual data characteristic of video database systems. We discuss this data- modeling effort in the context of our multiple perspective interactive video system which generates three-dimensional data sets using input from multiple video cameras.

关键词： Database systems

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Direct feature extraction from compressed images

Direct feature extraction from compressed images

引用

storage and retrieval for still image and video databases iv

作者： Shen, Bo Sethi, Ishwar K. Wayne State Univ. Detroit MI USA

ISBN: (纸本)0819420441

This paper examines the issue of direct extraction of low level features from compressed images. Specifically, we consider the detection of areas of interest and edges in images compressed using the discrete cosine transform (DCT). For interest areas, we show how a measure based on certain DCT coefficients of a block can provide an indication of underlying activity. For edges, we show using an ideal edge model how the relative values of different DCT coefficients of a block can be used to estimate the strength and orientation of an edge. Our experimental results indicate that coarse edge information from compressed images can be extracted up to 20 times faster than conventional edge detectors.

关键词： image processing

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Multimedia information retrieval by analysing content and learning from examples

Multimedia information retrieval by analysing content and le...

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

作者： Ganapathy, S.Kicha Lei, Zhibin Safranek, Robert J. Bell Lab Murray Hill NJ United States

Multimedia Information Systems are experiencing a tremendous growth as a direct consequence of the popularity and pervasive use of world wide web. As a consequence, it is becoming increasingly important to provide efficient and flexible solutions for accessing and retrieving multimedia data. images and video are emerging as significant data types in multimedia systems. And yet, most commercial systems are still text and key-word based and do not fully exploit the image content of these systems. We believe that there is an opportunity to build a novel interactive multimedia system for some specific applications in electronic commerce. In this paper we present an overview of our approach, the rationale behind it and the problems that are inherent in building such a system. We address some of the technical issues in representing and analysing image primitive features. These are the building blocks of any such systems. They can be generalized into a much broader range of applications as well.

关键词： Multimedia systems

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Comparative study of strategies for illumination-invariant texture representations

Comparative study of strategies for illumination-invariant t...

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

作者： Levienaise-Obadia, B. Kittler, J. Christmas, W. Univ of Surrey Guildford United Kingdom

Illumination invariance is of paramount importance to annotate video sequences stored in large videodatabases consistently. Yet, popular texture analysis methods such as multichannel filtering techniques do not yield illumination-invariant texture representations. In this paper, we assess the effectiveness of three illumination normalisation schemes for texture representations derived from Gabor filter outputs. The schemes aim at overcoming intensity scaling effects due to changes in ilumination conditions. A theoretical analysis and experimental results enable us to select one scheme as the most promising one. In this scheme, a normalising factor is derived at each pixel by combining the energy responses of different filters at that pixel. The scheme overcomes illumination variations well, while still preserving discriminatory textural information. Further statistical analysis may shed light on other interesting properties or limitations of the scheme.

关键词： image analysis

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Multimedia databases

Multimedia databases

引用

International conference on Information Visualisation (iv)

作者： O. Kalipsiz Computer Science Department Yildiz Technical University Istanbul Turkey

A multimedia database is a controlled collection of multimedia data items such as text, images, graphic objects, video and audio. A multimedia database management system (DBMS) provides support for the creation, storage, access, querying and control of a multimedia database. The requirements of a multimedia DBMS are: multimedia data modeling; multimedia object storage; multimedia indexing, retrieval and browsing; and multimedia query support. This paper discusses a general framework for multimedia database systems and describes the requirements and architecture for these systems.

关键词： Multimedia databases Multimedia systems Database systems Graphics Animation video compression image databases Indexing Information retrieval videoconference

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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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Augmented Album: situation-dependent system for a personal digital video/image collection

Augmented Album: situation-dependent system for a personal d...

引用

IEEE International conference on Multimedia and Expo (ICME)

作者： K.P. Hewagamage M. Hirakawa Information Systems Laboratory Hiroshima University Japan

Augmented Album is an application developed to demonstrate how user situations can be used to provide an easy-to-use and easy-to-remember interface for the management and retrieval of digital pictures that consist of both digital video clips and still images. In this system, contextual information such as the location, time, and user events, are captured when a picture is taken. It represents the meaning of the picture as well as its content information to some extent, and thus benefits us to retrieve image/video clips. At the same time, the contextual information could be used to achieve a more realistic organization of those pictures on a computer system.

关键词： Information retrieval image retrieval Content based retrieval Computer displays Computer interfaces image storage Prototypes Multimedia databases Management information systems Engineering management

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