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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems II"

共 179 条记录，以下是11-20 订阅

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Spatially Organized Visualization of Image Query Results

Spatially Organized Visualization of Image Query Results

引用

conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems V

作者： Ciocca, Gianluigi Cusano, Claudio Santini, Simone Schettini, Raimondo Univ Milano Bicocca Viale Sarca 336 I-20126 Milan Italy

ISBN: (纸本)9780819484185

In this work we present a system which visualizes the results obtained from image search engines in such a way that users can conveniently browse the retrieved images. The way in which search results are presented allows the user to grasp the composition of the set of images "at a glance". To do so, images are grouped and positioned according to their distribution in a prosemantic feature space which encodes information about their content at an abstraction level that can be placed between visual and semantic information. The compactness of the feature space allows a fast analysis of the image distribution so that all the computation can be performed in real time.

关键词： Image retrieval content-based image analysis image browsing

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Enriching text with images and colored light

Enriching text with images and colored light

引用

conference on multimedia content access - algorithms and systems ii

作者： Sekulovski, Dragan Geleijnse, Gijs Kater, Bram Korst, Jan Pauws, Steffen Clout, Ramon Philips Res Europe NL-5656 AE Eindhoven Netherlands

ISBN: (纸本)9780819469922

We present an unsupervised method to enrich textual applications with relevant images and colors. The images are collected by querying large image repositories and subsequently the colors are computed using image processing. A prototype system based on this method is presented where the method is applied to song lyrics. In combination with a lyrics synchronization algorithm the system produces a rich multimedia experience. In order to identify terms within the text that may be associated with images and colors, we select noun phrases using a part of speech tagger. Large image repositories are queried with these terms. Per term representative colors are extracted using the collected images. Hereto, we either use a histogram-based or a mean shift-based algorithm. The representative color extraction uses-the non-uniform distribution of the colors found in the large repositories. The images that are ranked best by the search engine are displayed on a screen, while the extracted representative colors are rendered on controllable lighting devices in the living room. We evaluate our method by comparing the computed colors to standard color representations of a set of English color terms. A second evaluation focuses on the distance in color between a queried term in English and its translation in a foreign language. Based on results from three sets of terms, a measure of suitability of a term for color extraction based on KL Divergence is proposed. Finally, we compare the performance of the algorithm using either the automatically indexed repository of Google Images and the manually annotated ***. Based on the results of these experiments, we conclude that using the presented method we can compute the relevant color for a term using a large image repository and image processing.

关键词： Genetic algorithms Image segmentation Quantization Light sources and illumination Detection and tracking algorithms Image processing Image retrieval Distance measurement multimedia Prototyping

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Adaptive filtering for delivering multimedia services in W-CDMA cellular networks using genetic algorithms

Adaptive filtering for delivering multimedia services in W-C...

引用

International conference on Wireless Networks, Communications and Mobile Computing

作者： De Angelis, F Habib, I CUNY City Coll New York NY 10031 USA

ISBN: (纸本)0780393058

This paper presents tin adaptive filtering algorithm for the delivery of multimedia content with different qualify of service (QoS) requirements in time-varying wideband code-division multiple access (W-CDMA) cellular networks. The algorithm objective is to guarantee levels of quality for two different user defined profiles (Premium, or Economy), while attempting to maximize the allocation of the radio channel bandwidth and maintaining the QoS requirements of downloaded traffic flows (audio, video, and data). Our proposed solution is based upon utilizing Genetic algorithms (GAs) to solve a multi-objective function that selects, during a control period, the bit rates and formats for the media codecs of downloaded traffic flows and assigns the air interface channel rate and power to each user, subject to different constraints. To show the performance of the algorithm, W-CDMA systems with and without filtering capabilities are compared.

关键词： adaptive filters bandwidth allocation broadband networks cellular radio code division multiple access filtering theory genetic algorithms multimedia communication quality of service QoS adaptive filtering algorithm code-division multiple access genetic a adaptive filters Code division multiple access Quality of service Genetic Algorithm (GA) multimedia services WCDMA filtering theory Broadband networks bandwidth allocation multimedia content Traffic flow audio video

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Towards a multimedia remote viewer for mobile thin clients

Towards a multimedia remote viewer for mobile thin clients

引用

conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems V

作者： Joveski, B. Simoens, P. Gardenghi, L. Marshall, J. Mitrea, M. Vankeirsbilck, B. Preteux, F. Dhoed, B. TELECOM SudParis Inst TELECOM ARTEMIS Dept Evry France IBBT Ghent Belgium Univ Ghent Ghent Belgium Prologue Software Gennevilliers France MINES ParisTech Paris France

ISBN: (纸本)9780819484185

Be there a traditional mobile user wanting to connect to a remote multimedia server. In order to allow them to enjoy the same user experience remotely (play, interact, edit, store and share capabilities) as in a traditional fixed LAN environment, several dead-locks are to be dealt with: (1) a heavy and heterogeneous content should be sent through a bandwidth constrained network;(2) the displayed content should be of good quality;(3) user interaction should be processed in real-time and (4) the complexity of the practical solution should not exceed the features of the mobile client in terms of CPU, memory and battery. The present paper takes this challenge and presents a fully operational MPEG-4 BiFS solution.

关键词： remote viewer multimedia mobile thin clients BiFS

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Comparative study of autostereoscopic displays for mobile devices

Comparative study of autostereoscopic displays for mobile de...

引用

conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems V

作者： Boev, Atanas Gotchev, Atanas Tampere Univ Technol Dept Signal Proc FI-33101 Tampere Finland

ISBN: (纸本)9780819484185

We perform comparative analysis of the visual quality of multiple 3D displays - seven portable ones, and a large 3D television set. We discuss two groups of parameters that influence the perceived quality of mobile 3D displays. The first group is related with the optical parameters of the displays, such as crosstalk or size of sweet spots. The second group includes content related parameters, such as objective and subjective comfort disparity range, suitable for a given display. We identify eight important parameters to be measured, and for each parameter we present the measurement methodology, and give comparative results for each display. Finally, we discuss the possibility of each display to visualize downscaled stereoscopic HD content with sufficient visual quality.

关键词： portable 3D displays parallax barrier lenticular sheet light guide HDDP crosstalk accommodation-convergence rivalry comfort disparity range subjective quality downscaled stereoscopic content

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Event-centric media management

Event-centric media management

引用

conference on multimedia content access - algorithms and systems ii

作者： Scherp, Ansgar Agaram, Srikanih Jain, Ramesh OFFIS Inst Informat Technol D-26121 Oldenburg Germany Univ Calif Irvine Irvine CA 92697 USA

ISBN: (纸本)9780819469922

The management,of the vast amount of media assets captured at every day events such as meetings, birthday parties, vacation, and conferences has become an increasingly challenging problem. Today, most media management applications are media-centric. This means, they put the captured media assets into the center of the management. However, in recent years it has been proposed that events are a much better abstraction of human experience and thus provide a more appropriate means for managing media assets. Consequently, approaches that include events into their media management solution have been explored. However, they typically consider events only as some more metadata that can be extracted from the media assets. In addition, today's applications and approaches concentrate on particular problems such as event detection, tagging, sharing, classification, or clustering and are often focused on a single media type. In this paper, we argue for the benefits of an event-centric media management (EMMa) approach that-looks at the problem of media management holistically. Based on a generic event model, we specify a media event model for-the EMMa approach. The single -phases and processes of the EMMa approach are defined in a general process chain for-an event-centric media management, the EMMa cycle. This cycle follows the event concept throughout all phases and processes of the chain and-puts the concept of events in the center of the media management. Based on the media event model and EMMa cycle, we design a component-based architecture for the EMMa approach and conduct an implementation of the approach.

关键词： events event-centric media management event classification event clustering multimedia authoring

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Swimmer Detection and Pose Estimation for Continuous Stroke Rate Determination

Swimmer Detection and Pose Estimation for Continuous Stroke ...

引用

conference on multimedia on Mobile Devices and multimedia content access - algorithms and systems VI

作者： Zecha, Dan Greif, Thomas Lienhart, Rainer Univ Augsburg Multimedia Comp Lab Augsburg Germany

ISBN: (纸本)9780819489517

In this work we propose a novel approach to automatically detect a swimmer and estimate his/her pose continuously in order to derive an estimate of his/her stroke rate given that we observe the swimmer from the side. We divide a swimming cycle of each stroke into several intervals. Each interval represents a pose of the stroke. We use specifically trained object detectors to detect each pose of a stroke within a video and count the number of occurrences per time unit of the most distinctive poses (so-called key poses) of a stroke to continuously infer the stroke rate. We extensively evaluate the overall performance and the influence of the selected poses for all swimming styles on a data set consisting of a variety of swimmers.

关键词： Object detection pose estimation stroke rate estimation swimming channel

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Recognizing persons in images by learning from videos

Recognizing persons in images by learning from videos

引用

conference on multimedia content access - algorithms and systems

作者： Hoerster, Eva Lux, Jochen Lienhart, Rainer Univ Augsburg Multimedia Comp Lab D-8900 Augsburg Germany

ISBN: (纸本)9780819466198

In this paper, we propose an approach for automatically, recognizing persons in images based on their general outer appearance. Therefore we build a statistical model for each person. Large amounts of training data are collected and labeled automatically by using a visual sensor array capturing image sequences containing the person to be learnt. Foreground-background segementation is performed to seperate the person from background, thus enabeling to learn the persons appearance independent of the background. Color and gradient features are extracted representing the segmented person. Person recognition of incoming photos is carried out using (k)-Nearest Neighbor(s) classification and the normalized histogram intersection match value is used as distance measure. Reported experimental results show that the presented approach performs well.

关键词： object recognition object identification person recognition person identification

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Storage format for personalized broadcasting content consumption

Storage format for personalized broadcasting content consump...

引用

conference on multimedia content access - algorithms and systems

作者： Jin, Sung Ho Jang, Jea-Seok Min, Hyun-Seok Ro, Yong Man Kim, Hui Yong Informat & Commun Univ Image & Video Syst Lab 119 Munjiro Taejon 305732 South Korea Elect & Telecommun Res Inst Broadcasting Media Res Grp Daejeon South Korea

ISBN: (纸本)9780819466198

In this paper, we propose a storage format which binds digital broadcasts with related data such as TV-Anytime metadata, additional multimedia resources, and personal viewing history. The goal of the proposed format is to make it possible to offer personalized content consumption after recording broadcasting contents to storage devices, e.g., HD-DVD and Blu-ray Disc. TO achieve that, we adopt MPEG-4 file format as a container and apply a binary format for scenes (BIFS) for representing and rendering personal viewing history. In addition, TV-Anytime metadata is used to describe broadcasts and to refer to the additional multimedia resources, e.g, images, audio clips, and short video clips. To demonstrate the usefulness of the proposed format, we introduce an application scenario and test it on that scenario.

关键词： storage format broadcasting content TV-anytime metadata MPEG-4 file format BIFS

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multimedia summaries of broadcast news

Multimedia summaries of broadcast news

引用

conference on Intelligent Information systems (iiS 97)

作者： Maybury, MT Merlino, AE Mitre Corp Adv Informat Syst Ctr Bedford MA 01730 USA

ISBN: (纸本)0818682183

Increasing amounts of text, audio, and video content has fueled efforts to provide direct, content based access to these materials. Summaries are often necessary to enable timely relevancy assessments, information extraction, or information analysis from source material. Whereas text summarization research is receiving increasing attention, comparatively few investigators have examined video summarization. This paper reports on the extension of a broadcast news access system to provide multimedia summaries. We briefly overview our system for video analysis, focusing on our novel integration of image, speech and language processing techniques to support automated video summarization. We outline algorithms for proper name and keyphrase extraction, story segmentation, and key frame extraction which together underpin our current ability to automatically summarize video. We describe the systems ability to generate multimedia video summaries tailored to a user query. We discuss evaluation metrics for measuring the (quality) value of these summary artifacts.

关键词： content-based video access video summarization broadcast news

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