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Processing of partial video data for detection of wipes

Processing of partial video data for detection of wipes

引用

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

作者： Kim, Hyeokman Park, Sung-Jun Lee, Jinho Kim, Woonkyung M. Song, S.Moon-Ho Korea Telecom Seoul Korea Republic of

With the currently existing shot change detection algorithms, abrupt changes are detected fairly well. It is thus more challenging to detect gradual changes including fades, dissolves, and wipes as these are often missed or falsely detected. In this paper, we focus on the detection of wipes. the proposed algorithm begins by processing the visual rhythm, a portion of the DC image sequence. It is a single image, a sub-sampled version of a full video in which the sampling is performed in a pre-determined and in a systematic fashion. the visual rhythm contains distinctive patterns or visual features for many different types of video effects. the different video effects manifest themselves differently on the visual rhythm. In particular, wipes appear as curves that run from the top to the bottom of the visual rhythm. thus, using the visual rhythm, it becomes possible to automatically detect wipes simply by determining various lines and curves on the visual rhythm.

关键词： video signal processing

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Efficient color feature extraction in compressed video

Efficient color feature extraction in compressed video

引用

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

作者： Won, Chee Sun Park, Dong Kwon Na, In Yup Yoo, Seong-Joon Dongguk Univ Seoul Korea Republic of

In this paper, we propose a new image feature extraction method for MPEG compressed video. To minimize the MPEG decoding process, we use only DC values for Y, Cr, and Cb components for each macroblock. then, we can obtain a feature vector using the decoded DC values of Y, Cr, and Cb components for all macroblocks in an I frame. the feature vector consists of histograms for various colors, luminance, and edge types. In obtaining histograms for colors and luminance features, we consider the ratio of contributing pure colors and luminance to the chroma DC values for each macroblock. then, we update all contributing colors and/or luminance histograms accordingly. Otherwise, if the macro block is classified as an edge block, then we update the corresponding edge type histogram. To demonstrate the performance of the proposed feature extraction method, we apply it to a scene change detection problem.

关键词： Feature extraction

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Comparative study of strategies for illumination-invariant texture representations

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

引用

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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Multi-linearization data structure for image browsing

Multi-linearization data structure for image browsing

引用

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

作者： Craver, Scott Yeo, Boon-Lock Yeung, Minerva Princeton Univ Princeton NJ United States

image search has been actively studied in recent years. On the other hands, image browsing has received little attention. image browsing refers to the process of presenting some forms of overview or summary of the image relationships, thus facilitating a user to navigate across the data set and find images of interests. In this paper, we present a new data structure built on the multi-linearization of image attributes for efficient organization of the data set and fast visual browsing of the images. We describe new techniques for multi-linearization based on multiple space-filling curves and hierarchical clustering techniques. In addition to providing fast navigation, our proposed data structure allows computationally efficient insertion and deletion of images from the data set. We then present a novel image navigator and browser built on dual-linearization data structure and intuitive presentation of image relevance and relationships, demonstrate the image navigation process, and report results on 1000 and 22,000 image databases. We also discuss how our data structure can be extended to support fast image search.

关键词： image analysis

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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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image indexing using composite regional color channels features

Image indexing using composite regional color channels featu...

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

作者： Appas, Ahmed R. Darwish, Ahmed M. El-Desouki, Ayman I. Shaheen, Samir I. Electronic Research Inst Dokki Egypt

Color indexing is a technique by which images in the database could be retrieved on the bases of their color content. In this paper, we propose a new set of color features for representing color images, and show how they can be computed and used efficiently to retrieve images that possess certain similarity. these features are based on the first three moments of each color channel. Two differences distinguish this work from previous work reported in the literature. First, we compute the third moment of the color channel distribution around the second moment not around the first moment. the second moment is less sensitive to small luminance changes, than the first moment. Second we combine all three moment values in a single descriptor. this reduces the number of floating point values needed to index the image and hence speeds up the search. To give the user flexibility in terms of defining his center of attention during query time, the proposed approach divides the image into five geometrical regions and allows the user to give different weights for each region to designate its importance. the approach has been tested on databases of 205 images of airplanes and natural scenes. It proved to be insensitive to small rotations and small translations in the image and yielded a better hit rate than similar algorithms previously reported in the literature.

关键词： image analysis

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New Digital Broadcasting Services for Use with TV Sets Containing Digital storage Devices 99

New Digital Broadcasting Services for Use with TV Sets Conta...

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7th ACM International conference on Multimedia (Part 1), MULTIMEDIA 1999

作者： Hayasaka, Rina Matoba, Hiroshi Maeno, Kazutoshi Human Media Research Laboratories NEC 1-1 Miyazaki 4-chome Miyamae-ku Kanagawa Kawasaki216-8555 Japan Advanced Broadcast Systems Development Division NEC 10 Nisshin-cho 1-chôme Fuchu Tokyo183-8501 Japan

ISBN: (纸本)9781581132397

this paper describes two novel broadcasting services for providing high quality digital video transmissions using the MPEG-2 encoding standard. While image quality in conventional MPEG-2 broadcasting is limited by the available transmission capacity, we propose using TV sets with digital storing devices to create a much higher virtual bandwidth that allows for high quality transmissions. Furthermore, both services are backward compatible, that is ordinary TV sets without such storage devices will still be able to receive regular program, although at a lower quality. © 1999 ACM.

关键词： Signal encoding

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Digital image recording: An integral aspect of video endoscopy

Digital image recording: An integral aspect of video endosco...

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7th conference on Medicine Meets Virtual Reality, MMVR 1999

作者： Preminger, Glenn M. Delvecchio, Fernando C. Birnbach, Jeffrey M. Comprehensive Kidney Stone Center Department of Surgery Duke University Medical Center DUMC Box 3167 Durham NC 27710 United States PhysiTel Incorporated 1500 Marina Bay Drive #1560 Clear Lake Shores TX 77565 United States

ISBN: (纸本)9051994451

In today's medical environment, efficiency and accuracy are the keys to successful outcomes. this concept is especially applicable during video endoscopic imaging, where image clarity is of utmost importance for medical applications. One of the most exciting advances in video endoscopy is the development of digital image storage devices. We report on a fast and efficient way to grab and store images during endoscopic procedures. images can be stored on standard 3.5″ floppy disks using an innovative new digital image recorder. the images are stored as high resolution JPEG files (640×480×24) for excellent clarity and detail. Once loaded onto the computer or network, the images can be placed into electronic medical records, imported into internet web pages, incorporated into slide presentations, and most importantly, stored in well organized archives which take up a minimum of space and are easily accessed by multiple users. this digital image recorder provides a complete system for acquiring images on a standard format 3.5″ floppy disk - the world's most ubiquitous storage format.

关键词： Floppy disk storage

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Collection-based persistent archives

Collection-based persistent archives

引用

IEEE Symposium on Mass storage Systems

作者： A. Rajasekar R. Marciano R. Moore Supercomputer Center San Diego USA

the supercomputer center, digital library, and archival storage communities have common persistent archival storage requirements. Each of these communities is building software infrastructure to organize and store large collections of data. An emerging common requirement is the ability to maintain data collections for long periods of time. the challenge is to maintain the ability to discover, access, and display digital objects that are stored within the archive, while the technology used to manage the archive evolves. We propose an approach based upon the storage of the digital objects that comprise the collection, augmented with the meta-data attributes needed to dynamically re-create the data collection. this approach builds upon the technology needed to support extensible database schema, which in turn enables the creation of data-handling systems that support replicated data sets within federated archives.

关键词： Relational databases Supercomputers Object oriented databases Software libraries Displays Technology management Brain Neuroscience image databases Information management

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Overview of a TRW pilot program

Overview of a TRW pilot program

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IEEE Symposium on Mass storage Systems

作者： W.A. Olsen TRW Columbia MD USA

Recently TRW fielded a prototype system for a government customer. It provides a wide range of capabilities including data collection, hierarchical storage, automated distribution, data analysis, and product dissemination of imagery information. the system is capable of processing thousands of data sets and storing over 400 Gigabytes (GB) of data per day. Over 100 users are supported in a distributed system covering eleven geographical areas. the development effort spanned two years and involved the integration of over 200 COTS/GOTS products. the data that is collected, stored, and disseminated is composed of large image file data sets (from 700 MB to three GB per data file) and associated metadata. Initial customer requirements of a two-year retention window and access latency of less than ten seconds dictated three-tier storage architecture.

关键词： Hardware Computer architecture Software performance Laboratories Software systems databases Collaborative software Content management Government image storage

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