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REAL-TIME OBJECT EXTRACTION SYSTEM WITH SEQUENTIAL GROWING 2

REAL-TIME OBJECT EXTRACTION SYSTEM WITH SEQUENTIAL GROWING

引用

conference on storage and retrieval for image and video databases ii

作者： NISHIMURA, R ODA, M NONAKA, S IMAIDE, T HITACHI LTD IMAGE & MEDIA SYST LABTOTSUKA KUYOKOHAMA 244JAPAN

ISBN: (纸本)0819414808

This paper describes a novel system for real-time object extraction from a moving video image. The object extraction method employed in this system has two features. The first one is multi-channel thresholding in a color space for extracting a target with several colors as a single object. The color space is normalized by luminance to make the process robust against light intensity fluctuations. The other feature is a key algorithm, called sequential growing, which exploits interfield correlation of a video image and realizes field-rate operation. In this algorithm, a binary image representing a target object is generated by growing an initially given mask image horizontally and vertically until whole object is extracted. We have also fabricated a 0.8 micrometers CMOS chip to incorporate the system into a compact video camera, which has successfully extracted objects in a number of general scenes.

关键词： video Cameras Detection and tracking algorithms Imaging systems Binary data image processing Signal processing Digital signal processing Feature extraction Seaborgium

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SCALABLE video DATA PLACEMENT ON PARALLEL DISK ARRAYS 2

SCALABLE VIDEO DATA PLACEMENT ON PARALLEL DISK ARRAYS

引用

conference on storage and retrieval for image and video databases ii

作者： CHANG, E ZAKHOR, A UNIV CALIF BERKELEY BERKELEYCA 94720

ISBN: (纸本)0819414808

We present three strategies for placement of video data on parallel disk arrays. Using a low- level disk model and video data from a scalable subband coding technique, we derive constraints with which to compare the three strategies. One strategy, constant frame grouping, is shown to be superior. Two methods for interleaving multiple videos under the constant frame grouping strategy are presented: nonperiodic and periodic. Periodic interleaving is shown to have the advantages of a lower access time and limited scan and pause functions. The constant frame grouping strategy is tested on an actual array of 8 disks and shown to have performance that is close to the theoretical prediction. The scalable nature of the compressed data is used to relieve the disk system overload for an overly high request rate.

关键词： video Neodymium video compression Data modeling Scalable video coding Data storage Performance modeling Switching Scattering Televisions

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COMPARISON OF SUBBAND FEATURES FOR AUTOMATIC-INDEXING OF SCIENTIFIC image databases 2

COMPARISON OF SUBBAND FEATURES FOR AUTOMATIC-INDEXING OF SCI...

引用

conference on storage and retrieval for image and video databases ii

作者： PEREZLOPEZ, K SOOD, A GEORGE MASON UNIV CTR IMAGE ANALFAIRFAXVA 22030

ISBN: (纸本)0819414808

Indexing of scientific image databases is a difficult task, due to their extraordinary sizes and to the complex nature of the visual information contained in them. This data volume and complexity require an automatic indexing scheme that will categorize this visual content; without it, the data will be essentially useless to scientists and medical doctors. A method for automatic indexing of scientific image databases is presented which involves a wavelet package decomposition of images in the frequency domain, resulting in a quad-tree of subbands. These subbands are regarded as realizations of random fields, and statistical measures are computed on them. One class of newly derived measures determines whether the subbands contain any significant organization of pixels beyond what chance would imply. If this is found to be true for a subband, its node is retained on an index tree, and other identifying measurements may be added. The structure of the resulting pruned subband tree constitutes the first level of index; the node statistics form a second indexing level. Results of a pilot study are reported; they suggest that further investigation of this approach is warranted.

关键词： databases Electronic filtering Visualization Wavelets image filtering image processing Information visualization Earth observing sensors Satellite imaging Satellites

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DESIGN ISSUES FOR A DIGITAL X-RAY ARCHIVE ACCESSED OVER INTERNET 2

DESIGN ISSUES FOR A DIGITAL X-RAY ARCHIVE ACCESSED OVER INTE...

引用

conference on storage and retrieval for image and video databases ii

作者： THOMA, GR LONG, LR BERMAN, LE NATL LIB MED LISTER HILL NATL CTR BIOMED COMMUNBETHESDAMD 20894

ISBN: (纸本)0819414808

The design of an electronic archive of digitized images of thousands of xrays collected as part of nationwide health surveys has raised several issues related to user interface design, image presentation and image compression. The project involves developing an image archive implemented with an optical disk jukebox, and user workstations that allow Internet access to the images. This paper describes: the physical layout design of the workstation screens; desirable image processing functions contributing to better viewing and minimizing artifacts; interface design factors contributing to ease-of-use and speed of task completion; and work toward the selection of a suitable image compression technique.

关键词： image processing Internet Sun Human-machine interfaces image compression image segmentation Control systems Spine databases Visualization

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storage HIERARCHY FOR video-ON-DEMAND SYSTEMS 2

STORAGE HIERARCHY FOR VIDEO-ON-DEMAND SYSTEMS

引用

conference on storage and retrieval for image and video databases ii

作者： SUZUKI, H NISHIMURA, K UEMORI, A SAKAMOTO, H NIPPON TELEGRAPH & TEL PUBL CORP HUMAN INTERFACE LABSMUSASHINOTOKYO 180JAPAN

ISBN: (纸本)0819414808

In this paper, we evaluate the performance of our trial hierarchical storage server by using simulation. Our system is composed of magnetic disk drives and an optical mass storage system (MSS). This is based on three key techniques: (1) multiple readout control using the time slot synchronous method, (2) quick access control of the MSS by using magnetic disk drives, (3) a storage hierarchy method for video programs that has three configurations. To verify the effectiveness of our storage hierarchy, we construct a queuing network simulation model of the system based on experimentally measured values, and analyze the average waiting time for each of the three configurations of video programs. Selecting the appropriate video program configuration shortens the average waiting time to half of previous times, with a quick access of less than 1 second, and with 8 simultaneous readouts. storage costs are reduced to about half that of magnetic disk drives only.

关键词： video Magnetism Optical discs Compact discs Local area networks Optical storage Telecommunications Control systems Data storage Interfaces

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BOUNDS FOR THE DISCRIMINATION POWER OF COLOR INDEXING TECHNIQUES 2

BOUNDS FOR THE DISCRIMINATION POWER OF COLOR INDEXING TECHNI...

引用

conference on storage and retrieval for image and video databases ii

作者： STRICKER, MA SWISS FED INST TECHNOL COMMUN TECHNOL LABCH-8092 ZURICHSWITZERLAND

ISBN: (纸本)0819414808

Most color indexing techniques proposed in the literature are similar: images are represented by color histograms, and a metric on the color histogram space is used to determine the similarity of images. In this paper we determine the limits of these color indexing techniques. We propose two functions to measure the discrimination power of indexing techniques: the capacity (how many distinguishable histograms can be stored) and the maximal match number (the maximal number of retrieved images). We derive bounds for these functions. These bounds have two practical aspects. First, they help a user to decide whether color histograms effectively index database images from a given domain. Second, they facilitate the choice of a good threshold for the distance below which histograms are considered similar. Our arguments are based on an analysis of the metrical properties of the histogram space and results from coding theory. The results show that over a large range of reasonable parameters the capacity is very large. Thus, the set of parameters for which color indexing works well can be described as the set of parameters for which the maximal match number is below an application-dependent maximum.

关键词： databases image retrieval Coding theory Binary data Distance measurement Data modeling Algorithm development Vector spaces Computer science

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EVALUATION OF AN APPLICATION-INDEPENDENT image-INFORMATION SYSTEM 2

EVALUATION OF AN APPLICATION-INDEPENDENT IMAGE-INFORMATION S...

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conference on storage and retrieval for image and video databases ii

作者： OAKLEY, J DAVIS, D SHANN, R XYDEAS, C UNIV MANCHESTER MULTI MEDIA RES GRPMANCHESTER M13 9PLLANCSENGLAND

ISBN: (纸本)0819414808

The Manchester Content Addressable image Database (CAID) is a generic tool which has been designed for image informatics and computer vision problems. The system stores pre- computed feature tokens, which are obtained by conventional processing of the input images, into a database which is accessed by a specialized query language (MVQL). MVQL extends the usual notion of a query language to include creation and refinement of groupings based on the stored attributes of the pre-computed features, and these groupings can be continued in a nested fashion. The aim of this paper is to report on two recent application studies. The first study concerns the automatic registration of volume MR data sets. This is achieved entirely within the CAID environment (i.e., as a database query) using only a short MVQL specification. The method used is based on curve token correspondence and an exhaustive search of transformation space. Some results on the estimated accuracy of the result will be included. The second application is concerned with the classification of microfossil images into morphological groups. Preliminary work on detecting microfossil structures was reported in Shann et al. Here we address the problem of classifying detected structures into six broad morphological groups. This is achieved using MVQL to define `structure' measures from the distribution of curve tokens in a circular region around each microfossil. The results are surprisingly good considering the very limited feature evidence used. Both application studies confirm the general applicability of the CAID structure and its query language.

关键词： Sensors databases Head image registration Magnetic resonance imaging image classification image segmentation Sensor performance image processing image retrieval

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Two-stage strategy for indexing and presenting video 2

Two-stage strategy for indexing and presenting video

引用

storage and retrieval for image and video databases ii 1994

作者： Cherfaoui, Mourad Bertin, Christian TMM/CCETT 4 rue du Clos courtel Cesson-sevigne35512 France

Owing to the advent of multimedia, simultaneous access 'to text, image, sound, graphics and video has now became been made possible. However, video on computers is a very recent capability. It is achieved thanks to the progress made in hardware components, digitization equipments, storage media (CD ROM) and, above all, image compression techniques (JPEG 1 for still pictures and MPEG 2for motion pictures). The representational power of video makes it the favourite medium for many multimedia applications. The various media are not used in the same way. A structured text (with a table of contents), a still, graphics or sound (with representative graph) may be seen as a whole, allowing them to be handled (for editing purposes for example). Furthermore, these media support information-based navigation (hypertext 3 is a good example of this capability). On the other hand, video is basically a sequential medium. Operations such as fast-forward, rewind and pause allow only limited interactivity when consulting video. This lack of interactivity is due to the fact that video information, unlike structured text, is delivered "flat", with no indications. In order to have the same capacities as in a structured text, it is necessary to have an interpretation level above the raw video information. In the case of structured text, the interpretation level corresponds to paragraph and chapter titles and to the table of contents. Furthermore, text has a basic semantic entity : the word which is used with the search function and the index to create a multiplicity of navigational possibilities through the information. The goal of our work is aimed to offer ways of accessing videos which are similar to those of structured texts. This will make it possible to: .quickly become acquainted with the video content, .quickly access the part of the video of particular interest and .haveentry points in the video. Our methodology is comprised of two stages. In the first stage, we seek to extract t

关键词： video image segmentation Cameras Zoom lenses Visualization image processing video processing video compression image compression Information visualization

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Digital image Processing and Visual Communications Technologies in the Earth and Atmospheric Sciences ii

Digital Image Processing and Visual Communications Technolog...

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Digital image Processing and Visual Communications Technologies in the Earth and Atmospheric Sciences ii

ISBN: (纸本)0819410209

This conference proceedings contains 23 papers. The topics discussed are earth imagery, remote sensing, geographical information systems, multispectral imagery, map databases, image databases, image storage and retrieval, visualization, environmental monitoring, forest monitoring, ocean monitoring, image processing, image analysis, neural network applications, feature extraction, computer vision, vision algorithms, and learning algorithms.

关键词： Remote sensing

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storage and retrieval Systems and Applications

Storage and Retrieval Systems and Applications

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storage and retrieval Systems and Applications

ISBN: (纸本)0819402958

The conference proceedings incorporates 29 papers that are subdivided into six sessions. These deal with optical media technologies;recording system technologies;mass storage systems and applications;and small-systems applications and peripherals. Topics considered include: computer graphics, databases, the publishing industry, image storage, optical disks, medical imaging, medical records, image processing, law enforcement, criminal identification, digital memory, image storage and retrieval, video recording, telescopes, recording heads, and magnetooptical recording.

关键词： Data storage, Optical

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