MULTIMEDIA '97最新文献_第3页

An open architecture for comic actor animation 一个用于喜剧演员动画的开放架构

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266376

Knut Manske, M. Mühlhäuser

{"title":"An open architecture for comic actor animation","authors":"Knut Manske, M. Mühlhäuser","doi":"10.1145/266180.266376","DOIUrl":"https://doi.org/10.1145/266180.266376","url":null,"abstract":"The multimedia rapture has held out hopes for advancements in\u0000user-centric computing. At the same time, however, there is a\u0000move towards autonomous software (cf. intelligent filters, mobile\u0000and distributed agents, etc.), leaving users with an uncomfortable\u0000lack of knowledge about and control over ?what these components\u0000are doing behind their backs?. Visualization of both autonomous\u0000agent action and user-agent interaction becomes a crucial issue if\u0000these conflicting trends are to be harmonized. We present a system\u0000service for comic actor animation, which can be used as a representation of agents of all kinds. A second use case is for rapid\u0000authoring of animations which augment multimedia presentations\u0000or off-the-shelf software. Our focus is on the reuse of the necessary artwork, using a modular and flexible building-block approach.\u0000As a preliminary step, this approach requires a set of elementary\u0000animation sequences to be created by a professional graphic artist,once per character. These sequences can be repeatedly combined\u0000in custom animated cartoons by easy-to-use commands at runtime.\u0000Our Comic Actor Editor Engine CAeditEngine uses a sophisticated approach for combining the elementary building blocks to\u0000form complete animations.\u0000Our Comic Actor Playing Engine CAplayEngine uses a digital\u0000chroma keying technique in combination with layering to display\u0000the animations on top of any graphical user interface and any\u0000interactive software.\u0000The system runs under MS Windows NT, a first version was used\u0000in a public interactive exhibit of multimedia and animation techniques and showed excellent performance.","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122681569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Combining supervised learning with color correlograms for content-based image retrieval 将监督学习与颜色相关图相结合用于基于内容的图像检索

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266383

Jing Huang, Ravi Kumar, Mandar Mitra

引用次数: 173

A framework for generating adaptable hypermedia documents 用于生成适应性强的超媒体文档的框架

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266348

L. Rutledge, J. V. Ossenbruggen, L. Hardman, D. Bulterman

引用次数: 26

Constraints for the web 网络的约束

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266361

A. Borning, Richard Kuang-Hsu Lin, K. Marriott

引用次数: 58

Receiver-driven bandwidth adaptation for light-weight sessions 接收器驱动的带宽适应轻量级会话

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266395

E. Amir, S. McCanne, R. Katz

{"title":"Receiver-driven bandwidth adaptation for light-weight sessions","authors":"E. Amir, S. McCanne, R. Katz","doi":"10.1145/266180.266395","DOIUrl":"https://doi.org/10.1145/266180.266395","url":null,"abstract":"Current Internet multicast conferencing tools treat all sources with equal importance in that they either statically allocate a fixed bandwidth to each source in a session, or they automatically adapt each source’s transmission rate independently of all other sources. But not all sources are of equal interest to all receivers. We believe that to effectively support human to human communication, this disparity in receiver interest should be reflected in the rate-adaptation process. To this end, we propose a protocol called “SCUBA” that enables media sources to intelligently account for receiver interest in their rate-adjustment algorithms. SCUBA is orthogonal to and complements existing rate-adaptation schemes and can interoperate with either senderor receiverdirected control systems. To scale the SCUBA protocol with multicast session size, we decouple the receiver-feedback process from the session size through sampling. This approach introduces a “tunable” tradeoff between convergence time and sampling accuracy that for large sessions is solely dependent on the control traffic bandwidth. In addition to its applicability in video conferencing, our control scheme can be combined with media transcoders to intelligently manage a bottleneck link at a well-known and fixed location in the network. We implemented SCUBA within our video conferencing tool vie and our media gateway rtpgw and feedback from their preliminary deployment indicates that the efficacy of the overall multimedia communication system has been greatly enhanced.","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115230338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 119

Move-to-rear list scheduling: a new scheduling algorithm for providing QoS guarantees 后移列表调度:一种提供QoS保证的新调度算法

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266336

J. Bruno, E. Gabber, Banu Özden, A. Silberschatz

{"title":"Move-to-rear list scheduling: a new scheduling algorithm for providing QoS guarantees","authors":"J. Bruno, E. Gabber, Banu Özden, A. Silberschatz","doi":"10.1145/266180.266336","DOIUrl":"https://doi.org/10.1145/266180.266336","url":null,"abstract":"In order to support multiple real time applications on a sin gle platform the operating system must provide Quality of Service QoS guarantees so that the system resources can be provisioned among applications to achieve desired levels of predictable performance The traditional QoS pa rameters include fairness delay and throughput In this paper we introduce a new QoS criterion called cumulative service The cumulative service criterion relates the total service obtained by a process under a scheduling policy to the ideal service that the process would have accumulated by executing on each resource at a reserved rate We say that a scheuling policy provides a cumulative service guar antee if the performance of the real system di ers from the ideal system by at most a constant amount A cumulative service guarantee is vital for applications e g a continous media le service that require multiple resources and de mand predictable aggregated throughput over all these re sources Existing scheduling algorithms that guarantee tra ditional QoS paramaters do not provide cumulative service guarantees We present a new scheduling algorithm called Move To Rear List Scheduling which provides a cumulative service guarantee as well as the traditional guarantees such as fairness proportional sharing and bounded delay The complexity of MTR LS is O ln n where n is the number","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129646942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

PanoramaExcerpts: extracting and packing panoramas for video browsing 全景摘录:提取和包装全景视频浏览

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266396

Y. Taniguchi, Akihito Akutsu, Yoshinobu Tonomura

{"title":"PanoramaExcerpts: extracting and packing panoramas for video browsing","authors":"Y. Taniguchi, Akihito Akutsu, Yoshinobu Tonomura","doi":"10.1145/266180.266396","DOIUrl":"https://doi.org/10.1145/266180.266396","url":null,"abstract":"Browsing is a fundamental function in multimedia systems. This paper presents PanoramaExcerpts a video browsing interface that shows a catalogue of two types of video icons: panoramic and keyframe icons. A panoramic icon is synthesized from a video segment taken with camera pan or tilt, and extracted using a camera operation estimation technique. A keyframe icon is extracted to supplement the panoramic icons; a shot-change detection algorithm is used. A panoramic icon represents the entire visible contents of a scene extended with camera pan or tilt, which is difficult to summarize using a single keyframe. For the automatic generation of PanoramaExcerpts, we propose an approach to integrate the following: (a) a shot-change detection method that detects instantaneous cuts as well as dissolves, with adaptive control over the sampling rate for efficient processing; (b) a method for locating segments that contain smooth camera pans or tilts, from which the panoramic icons can be synthesized; and (c) a layout method for packing icons in a space-efficient manner. We also describe the experimental results of the above three methods and the potential applications of PanoramaExcerpts.","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"145 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120971567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 131

Middleware for distributed multimedia (panel): need a new direction? 分布式多媒体中间件(面板):需要一个新的方向吗?

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266385

G. Parulkar, L. Rowe, D. Hutchison, J. Walpole, Raj Yavatkar

{"title":"Middleware for distributed multimedia (panel): need a new direction?","authors":"G. Parulkar, L. Rowe, D. Hutchison, J. Walpole, Raj Yavatkar","doi":"10.1145/266180.266385","DOIUrl":"https://doi.org/10.1145/266180.266385","url":null,"abstract":"This panel is motivated by three emerging trends: (1) multimedia applications represent an important class ‘of distributed and networking applications; (2) middleware has become a valuable software layer/system which allows users to develop large complex distributed applications without having to deal with details of underlying networking and operating system; and (3) object-oriented methodology has matured to the point that it has become a De-facto standard for software design and development. The last two trends also explain rapidly increasing commercial interest in OMG’s proposed middleware standard Common Object Request Broker Architecture (CORBA) and associated Object Request Broker (ORB) implementations. It is claimed that distributed object oriented middleware eliminates many tedious, error-prone and non-portable aspects of developing and maintaining distributed applications by automating common network programming tasks such as object location, object activation, parameter marshaling, fault recovery, and security. These three trends together motivate a need for an Object-Oriented middleware that can especially support distributed and networked multimedia applications. Several groups have already initiated efforts aimed at extending CORBA and associated ORBS to make them more suitable for multimedia applications. Others argue that multimedia applications have different requirements in that they require periodic processing and transmission of continuous streams of data, and that CORBA is the wrong middleware to extend for distributed multimedia applications.","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115768735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance enhancement of H.263 encoder based on zero coefficient prediction 基于零系数预测的H.263编码器性能增强

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266326

A. Yu, R. Lee, M. Flynn

引用次数: 25

3DSketch: modeling by digitizing with a smart 3D pen 3DSketch:用智能3D笔进行数字化建模

MULTIMEDIA '97 Pub Date : 1997-11-01 DOI: 10.1145/266180.266331

Song Han, G. Medioni

{"title":"3DSketch: modeling by digitizing with a smart 3D pen","authors":"Song Han, G. Medioni","doi":"10.1145/266180.266331","DOIUrl":"https://doi.org/10.1145/266180.266331","url":null,"abstract":"We describe a novel system “3DSketch” which demonstrates a two-handed 31) sketching paradigm for 3D modeling by casually digitizing an existing object. The conceptual model of the interface is based on the everyday experience in sketching with a pen on a piece of paper, but in our system, the user holds a 3D digitizing stylus as a 3D pen to sketch in 3D space. We call the pen a “smart pen”, since in the Prototyper module, the userjust sketches a few strokes on the object, and immediately sees a 3D prototype made of clay lumps; then, in the Retiner module, when the user adds more random strokes over the object, the prototype surface automatically adapts to follow the pen, and the surface features (edges and comers) dig21 with the user specified ones, as if the pen tip applied magnetic attractive force to the prototype: in the autoTracer module, the user sketches over smooth regions, and the system performs intelligent reasoning to infer smooth surfaces, and also extract discontinuity edges and comers from the user’s inaccurate and fragmented strokes. The internal surface representation is triangular splines (TriBezier, TriB, TYiNURElS), whose advantages in arbitrary triangulation and local subdivision make it flexible to model general surfaces.","PeriodicalId":250198,"journal":{"name":"MULTIMEDIA '97","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127748983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17