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检索条件"任意字段=Conference on Storage and Retrieval for Image and Video Databases III"

共 344 条记录，以下是231-240 订阅

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On the disk layout of near video on demand system 5

On the disk layout of near video on demand system

引用

conference on storage and retrieval for image and video databases V

作者： Lee, MH Chen, MC Ho, JM Ko, MT Institute of Information Science Academia Sinica Taipei Taiwan Department of Management Information System Shih Chien College Taipei Taiwan

ISBN: (纸本)0819424331

This paper discusses a novel data placement scheme which optimizes the storage utilization of a NVOD system. The scheme is most distinctive in the following two aspects: 1. It considers Me file blocks placement of programs featured different number NVOD channels. 2. The file blocks grouping scheme optimizes the storage utilization of a NVOD system.

关键词： near video on demand NVOD VOD disk layout

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Detection of camera operations in compressed video sequences 5

Detection of camera operations in compressed video sequences

引用

conference on storage and retrieval for image and video databases V

作者： Idris, F Panchanathan, S Univ. of Ottawa (Canada)

ISBN: (纸本)0819424331

Visual (image and video) database systems require efficient indexing to enable fast access to the images in a database. In addition, the large memory capacity and channel bandwidth requirements for the storage and transmission of visual data necessitate the use of compression techniques. Vector quantization (VQ) is an efficient technique for low bit rate image and video compression. In addition, the low complexity of the decoder makes VQ attractive for low power systems and applications which require fast decoding. The detection of camera operations provides a mechanism to segment a long video shot into short clips defined by homogeneous camera operations which can then be used for indexing. In this paper, we present a technique for the detection of camera operations in video sequences compressed using VQ. The proposed technique is executed in the compressed domain. This entails significant savings in computational and storage costs resulting in faster execution.

关键词： camera operations video segmentation video indexing vector quantization

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Recognition and visual feature matching of text region in video for conceptual indexing 5

Recognition and visual feature matching of text region in vi...

引用

conference on storage and retrieval for image and video databases V

作者： Kurakake, S Kuwano, H Odaka, K NTT Human Interface Labs. (Japan)

ISBN: (纸本)0819424331

An indexing method for content-based image retrieval by using textual information in video is proposed. Indices extracted from textual information make it possible to retrieve video data by a conceptual query, such as a topic or a person's name, and organize fiat video data into structured video data based on its conceptual content. To this end, we developed a text extraction and recognition algorithm and a visual feature matching algorithm for indexing and organizing video data at a conceptual level The text extraction and recognition algorithm identifies frames in the video which contain text, extracts the text regions from the frame, finds text lines, and recognizes characters in the text lines. The visual feature matching algorithm measures the similarity of frames containing text to find frames with similar appearance text, which can be considered topic change frames. Experiments using real video data showed that our algorithm can index textual information reliably and that it has good potential as a tool for making content-based conceptual-level queries to video databases.

关键词： content-based retrieval textual information in video telop character indexing layout analysis character recognition conceptual structure

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VisualGREP: A systematic method to compare and retrieve video sequences

VisualGREP: A systematic method to compare and retrieve vide...

引用

storage and retrieval for image and video databases VI conference

作者： Lienhart, R Effelsberg, W Jain, R Univ Mannheim D-68131 Mannheim Germany

ISBN: (纸本)0819427527

In this paper we consider the problem of similarity between video sequences. Three basic questions are raised and (partially) answered. Firstly, at what temporal duration can video sequences be compared? The frame, shot, scene and video levels are identified. Secondly, given some image or video feature, what are the requirements on its distance measure and how can it be "easily" transformed into the visual similarity desired by the inquirer? Thirdly how can video sequences be compared at different levels? A general approach based on either a set or sequence representation with variable degrees of aggregation is proposed and applied recursively over the different levels of temporal resolution. It allows the inquirer to fully control the importance of temporal ordering and duration. Promising experimental results are presented.

关键词： video retrieval video similarity video indexing video content analysis video representations

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A FFT based technique for image signature generation 5

A FFT based technique for image signature generation

引用

conference on storage and retrieval for image and video databases V

作者： Celentano, A DiLecce, V Università Ca' Foscari di Venezia Dipartimento di Matematica Applicata e Informatica Ca' Dolfin Dorsoduro 3825/e Venezia 30100 Italy Politecnico di Bari Dipartimento di Elettrotecnica e Elettronica Via Orabona 4 Bari 70125 Italy

ISBN: (纸本)0819424331

In this paper we address image retrieval by similarity in multimedia databases. We discuss the generation and use of signatures computed from image content. The proposed technique is not based on image annotation, therefore it does not require human assistance. Signatures abstract the directionality of image objects. They are computed from the image Fourier transform, and the influence of computation parameters on signature effectiveness is discussed. retrieval is based on spectrum comparison between a reference image, assumed as the query, and the images in a collection. We introduce a metric for comparing the spectra and ranking the result, and approach the issue of partial query specification. Sample results on a small test collection are given.

关键词： fast Fourier transform image feature extraction image signature content-based retrieval

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An image and video search engine for the World-Wide Web 5

An image and video search engine for the World-Wide Web

引用

conference on storage and retrieval for image and video databases V

作者： Smith, JR Chang, SF Department of Electrical Engineering Center for Image Technology for New Media Columbia University New York 10027 NY United States

ISBN: (纸本)0819424331

We describe a visual information system prototype for searching for images and videos on the World-Wide Web. New visual information in the form of images, graphics, animations and videos is being published on the Web at an incredible rate. However, cataloging this visual data is beyond the capabilities of current text-based Web search engines. In this paper, we describe a complete system by which visual information on the Web is (1) collected by automated agents, (2) processed in both text and visual feature domains, (3) catalogued and (4) indexed for fast search and retrieval. We introduce an image and video search engine which utilizes both text-based navigation and content-based technology for searching visually through the catalogued images and videos. Finally, we provide an initial evaluation based upon the cataloging of over one half million images and videos collected from the Web.

关键词： content-based visual query image and video storage and retrieval World-Wide Web

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A robust approach to video segmentation using compressed data 5

A robust approach to video segmentation using compressed dat...

引用

conference on storage and retrieval for image and video databases V

作者： Wei, Q Zhang, HJ Zhong, YZ Tsinghua University Department of Computer Science and Technology Beijing 100084 China HP Labs 1501 Page Mill Road Palo Alto 94304 CA United States

ISBN: (纸本)0819424331

Partitioning video sequences into individual shots is one of the fundamental processes in video content parsing and content-based video retrieval. Up to now, a variety of algorithms and systems have been developed to perform this task. However, most of these algorithms exhibit their weakness when applied to detect gradual transitions such as dissolves, wipe, fade-in and fade-out In this paper, we presented an integrated scheme to the detection of abrupt camera breaks and gradual scene changes using DCT coefficients and motion data encoded in the MPEG compression stream. The core of the proposed approach is a tree-like classifier. Three algorithms are organized in the classifier to deal with the complicated situation in real-world video sequences separately.

关键词： video segmentation video database content-based retrieval video compression multimedia

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image retrieval using the directional detail histogram

Image retrieval using the directional detail histogram

引用

storage and retrieval for image and video databases VI conference

作者： Androutsos, D Plataniotis, KN Venetsanopoulos, AN Univ Toronto Dept Elect & Comp Engn Digital Signal & Image Proc Lab Toronto ON M5S 3G4 Canada

ISBN: (纸本)0819427527

We present a technique for indexing the directional detail and smoothness present in an image. By directional detail we imply strong directional activity in the horizontal, vertical and diagonal direction present in areas of detail and texture. By smoothness we refer to the smooth or low frequency areas of the image which do not contain prominent edge or texture activity. We map the directional information into 3-d vectors, which are then used to build N-d histograms. These histograms can then be used as database indices which can be queried using histogram techniques.

关键词： image retrieval directional detail indexing wavelets histograms

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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...

引用

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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Developing high-level representations of video clips using video trails

Developing high-level representations of video clips using v...

引用

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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