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storage and retrieval for image and video databases VI Conference

作者： Kobla, V Doermann, D Faloutsos, C Univ Maryland Lab Language & Media Proc College Pk MD 20742 USA

ISBN: (纸本)0819427527

A high-level representation of a video clip comprising information about its physical and semantic structure is necessary for providing appropriate processing, indexing and retrieval capabilities for video databases. We describe a novel technique which reduces a sequence of MPEG encoded video frames to a trail of points in a low dimensional space. In our earlier work,(1) we presented techniques applicable in 3-D, but in this paper, we describe techniques that can be extended to higher dimensions where improved performance is expected. In the low-dimensional space, we can cluster frames, analyze transitions between clusters and compute properties of the resulting trail. Portions of the trail can be classified as either stationary or transitional, leading to high-level descriptions of the video. Tracking the interaction of clusters over time, we lay the groundwork for the complete analysis and representation of the video's physical and semantic structure.

关键词： video representation compressed video analysis MPEG FastMap

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AUTOMATIC INDEXING FOR storage AND retrieval OF LINE DRAWINGS

AUTOMATIC INDEXING FOR STORAGE AND RETRIEVAL OF LINE DRAWING...

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Conference on storage and retrieval for image and video databases III

作者： LORENZ, O MONAGAN, G SWISS FED INST TECHNOL CH-8092 ZURICHSWITZERLAND

ISBN: (纸本)081941767X

The usefulness of a collection of scanned graphical documents can be measured by the facilities available for their retrieval. We present an approach for indexing a collection of line drawings automatically. The indexing is based on the textual and graphical content of the drawings. This approach has been developed to facilitate `retrieval by example' in heterogeneous collections of graphical documents. No a priori knowledge about the application domain is assumed. Starting with a raster image, candidate character patterns and graphical primitives (i.e., line segments and arcs) are extracted. Candidate character patterns are classified by an OCR method and grouped into word hypotheses. Graphical features of various types are computed from groupings of graphical primitives (e.g., sequences of adjacent lines, pairs of parallel lines). retrieval occurs with a weighted information retrieval system. Each document of the collection and each query are described with a set of indexing features with their corresponding weights. The weight of an indexing feature reflects the descriptive nature of the feature and is computed from the number of occurrences of the indexing feature in the document (feature frequency ff) and the number of documents containing the indexing feature (document frequency df).

关键词： LINE DRAWINGS INDEXING retrieval SYSTEM GRAPHICAL FEATURES QUERY BY image EXAMPLE

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Efficient image retrieval with multiple distance measures 5

Efficient image retrieval with multiple distance measures

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Conference on storage and retrieval for image and video databases V

作者： Berman, A Shapiro, L Univ. of Washington (United States)

ISBN: (纸本)0819424331

There is a growing need for the ability to query image databases based on image content rather than strict keyword search. Most current image database systems that perform query by content require a distance computation for each image in the database. Distance computations can be time consuming, limiting the usability of such systems. There is thus a need for indexing systems and algorithms that can eliminate candidate images without performing distance calculations. As user needs may change from session to session, there is also a need for run-time creation of distance measures. In this paper, we introduce FIDS, or ''Flexible image Database System.'' FIDS allows the user to query the database based on user-defined polynomial combinations of predefined distance measures. Using an indexing scheme and algorithms based on the triangle inequality, FIDS can return matches to the query image without directly comparing the query image to much of the database. FIDS is currently being tested on a database of eighteen hundred images.

关键词： query by content image database triangle inequality distance measure composition

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image retrieval system based on interactive reduction of feature space

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Proceedings of SPIE - The International Society for Optical Engineering 1999年 3656卷 593-602页

作者： Kobayashi, Aki Yoshida, Toshiyuki Sakai, Yoshinori Tokyo Inst of Technology Tokyo Japan

This paper proposes an image retrieval system which searches a database for images similar to a target imagined by a user. The system uses image features, rather than keywords, and retrieves images by reducing a multidimensional feature space generated by the image feature vectors. First, the system presents the user some sample images with a suitable feature vector value and requires the user's interaction to obtain information on which image is similar to the target he/she has in his/her mind. Then, the information is used to appropriately reduce the feature space. This process is continued until the target region is reduced to a suitable volume. Since this method requires neither real target image nor keywords in retrieving, it is quite simple and practical. Experimental results show the advantage and efficiency of the proposed system.

关键词： Feature extraction

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video segmentation using combined cues

Video segmentation using combined cues

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storage and retrieval for image and video databases VI Conference

作者： Toller, MS Lewis, PH Nixon, MS Univ Southampton Dept Elect & Comp Sci Multimedia Res Grp Southampton SO17 1BJ Hants England

ISBN: (纸本)0819427527

The use of video data in the multimedia environment is increasing rapidly, and so tools to handle large volumes of video data are required. One of the first steps towards creating more versatile video tools is to segment the video data, i.e. partition it into its component shots. This paper presents a novel combination of algorithms for video segmentation, utilising histogram comparison, motion vector information (focus of expansion), and edge information to detect transitions between shots. Our method can reliably detect transitions such as camera breaks, fades, dissolves and wipes, in video compressed to the MPEG-I standard.

关键词： video segmentation key frame extraction

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Content-based live video retrieval by telop character recognition: TV-on-demand

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Proceedings of SPIE - The International Society for Optical Engineering 1999年 3656卷 120-130页

作者： Takahata, Minoru Kuwano, Hidetaka Kurakake, Shoji Matsuda, Chikashi Nishimura, Kazutoshi NTT Human Interface Lab Tokyo Japan

We have developed a TV-on-demand system that provides playback of a television program after a period ranging from a few seconds to one week after broadcast, and have conducted usage trials in cooperation with a television station in Nagano Prefecture of Japan. This system has been achieved through the development of various technologies such as automatic updating of stored television programs and contents retrieval by telop characters. Users in the trials can begin playback of a television program immediately after its broadcast has begun. The purpose of the trials was to evaluate the system's usability in applications such as contents retrieval, selective viewing of commercials, and customer service at the television station. This paper presents applied technologies and some experimental results and also addresses a new direction of information retrieval system based on the evaluation of the usage trials.

关键词： video on demand

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image content retrieval from image databases using feature integration by Choquet integral

Image content retrieval from image databases using feature i...

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7th storage and retrieval for image and video databases Conference

作者： Popescu, M Gader, P Univ Missouri Med Informat Grp Columbia MO 65201 USA

ISBN: (纸本)0819431273

A novel similarity measure based on the Choquet integral was introduced for retrieving images from a image database that "mostly" fit the query image. We showed that in certain conditions the measure is a norm, a fact that can be used to reduce the searching time using the triangle inequality. To test the new measure, a content based image retrieval system was built. The system was benchmarked against the visual retrieval cartridge, Virage, built into Oracle 8 database system. The results suggested that the new measure is useful for image retrieval.

关键词： image database Choquet integral similarity measure OWA Oracle 8

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User interface framework for image searching

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Proceedings of SPIE - The International Society for Optical Engineering 1999年 3656卷 573-580页

作者： Brewer Jr., Orlie T. Boeing Co Seattle United States

This paper describes an API for image searching. The attempt was to isolate the functionality of the GUI from the functionality of the image search engine. The GUI would then make calls to the image search API and could be used with any image search engine implementing that API. Also, different methods of specifying the initial search image are discussed as well as different methods of displaying the results, including the use of 3D using VRML.

关键词： Graphical user interfaces

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MULTIRESOLUTION video INDEXING FOR SUBBAND CODED video databases 2

MULTIRESOLUTION VIDEO INDEXING FOR SUBBAND CODED VIDEO DATAB...

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Conference on storage and retrieval for image and video databases II

作者： LEE, JW DICKINSON, BW PRINCETON UNIV DEPT ELECT ENGNPRINCETONNJ 08544

ISBN: (纸本)0819414808

In this paper we present a multiresolution approach for video indexing and feature matching of subband coded video databases. Subband coding refers to a coding technique where the input images are quantized after being decomposed into several narrow spatial frequency bands by filtering and decimation. Five different approaches were tested for scene change detection which is applied only on the lowest subband for computational efficiency. Two kinds of scene changes, abrupt and smoothly accumulated scene changes, mark the beginning of new scene segments. An index for each scene segment is the histogram of two representative frames, which we take to be the first and the last frame of the scene for simplicity. Using the approach of query by example, the index matching algorithm takes a multi-resolution approach by hierarchically comparing histograms at different resolutions. The search algorithm for the match between example query and its target scene segment starts from the coarsest resolution, and moves to the next finer resolution until a single match is obtained or the finest resolution is reached. Experimental results are presented, and the proposed indexing technique appears to be promising for its computational efficiency and its inherent hierarchical search procedure.

关键词： video Distance measurement image segmentation databases Linear filtering Motion measurement Detection and tracking algorithms Electronic filtering video compression image filtering

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Navigating from images using generic links based on image content 5

Navigating from images using generic links based on image co...

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Conference on storage and retrieval for image and video databases V

作者： Lewis, PH Kuan, J Perry, ST Dobie, MR Davis, HC Hall, W Univ. of Southampton (United Kingdom)

ISBN: (纸本)0819424331

Although content based retrieval of images is increasingly common, the use of media content as a basis for navigation has received relatively little attention. In this paper we describe our recent development of facilities in the MAVIS/Microcosm architecture for generic link authoring and following from non-text media and in particular, the use of shape and texture for content based navigation from images. Applications from a product catalogue and an archaeological collection are presented, together with an outline of an image viewer providing rapid delineation of object shapes in images when authoring or following links.

关键词： content based retrieval content based navigation information retrieval

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