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2012 17th ACM International Conference on Intelligent User Interfaces, IUI'12

作者： Schwartz, Tim Kahl, Gerrit Nurmi, Petteri Pulkkinen, Teemu Dim, Eyal Applin, Sally Cluster of Excellence - Multimodal Computing and Interaction Campus E1-1 66123 Saarbruecken Germany German Research Center for Artificial Intelligence Campus D3-2 66123 Saarbruecken Germany Helsinki Institute for Information Technology HIIT University of Helsinki P.O. Box 68 FI-00014 Helsinki Finland MIS Department University of Haifa Mount Carmel Haifa Israel Centre for Social Anthropology and Computing University of Kent Canterbury United Kingdom

ISBN: (纸本)9781450310482

The workshop explores the interactions between location awareness and Dual/Mixed Reality in smart environments and the impact on culture and society. The main scope of this workshop is: How can the Dual Reality paradigm be used to improve applications in smart environments and which new possibilities are opened up by these paradigms? This includes positioning methods and location-based services using the DR paradigm, such as navigation services and group interaction services (location-based social signal processing). The workshop is also open to discuss sensor and actuator technologies that may help to realize the synchronization of the virtual and real world. The main scope of this workshop is: How can the Dual Reality paradigm be used to improve location-based and sociallyaware services and other applications in smart environments? Copyright © 2012 ACM.

关键词： Location based services

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2012年 7424 LNCS卷 V-VI页

作者： Geva, Shlomo Kamps, Jaap Schenkel, Ralf Faculty of Science and Technology GPO Box 2434 Brisbane QLD 4001 Australia University of Amsterdam Archives and Information Studies/Humanities Turfdraagsterpad 9 1012 XT Amsterdam Netherlands Saarland University Cluster of Excellence Multimodal Computing and Interaction 66123 Saarbrücken Germany

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Report on the Autumn School "Information Retrieval" 2010

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Datenbank-Spektrum 2011年第1期11卷 73-77页

作者： Metzger, Steffen Hose, Katja Broschart, Andreas Max-Planck-Institut für Informatik Saarbrücken Germany Cluster of Excellence for Multimodal Computing and Interaction Saarbrücken Germany

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"Geremin": 2D microgestures for drivers based on electric field sensing 11

"Geremin": 2D microgestures for drivers based on electric fi...

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2011 15th ACM International Conference on Intelligent User Interfaces, IUI'11

作者： Endres, Christoph Schwartz, Tim Müller, Christian German Research Center for Artificial Intelligence Saarbrücken Germany Cluster of Excellence Multimodal Computing and Interaction Saarland University Germany

ISBN: (纸本)9781450304191

We introduce the "Geremin" approach on in-car 2D microgesture recognition, which belongs to the category of electric field sensing techniques detecting the presence of a human hand near a conductive object (not affected by light and dynamic backgrounds, fast response times). The core component is essentially a modified "Theremin", an early electronic musical instrument named after the Russian inventor Professor Léon Theremin. Gesture recognition is done using a Dynamic Time Warp DTW algorithm. With respect to the application domain, we follow the direction of "se-lective mapping to theme or function" suggested in the literature. For gesture location, we propose the immediate proximity of the steering wheel, which has the advantage of providing gesture-based interaction without requiring the driver to take off hand(s). The major motivating factor for the proposed approach is reducing installation costs. Although, we use a single-antenna setup for this study, our results indicate that the gain in recognition accuracy justifies the use of two or more. © 2011 ACM.

关键词： Gesture recognition

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Freehand HDR imaging of moving scenes with simultaneous resolution enhancement

Freehand HDR imaging of moving scenes with simultaneous reso...

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32nd Annual Conference on European Association for Computer Graphics, EUROGRAPHICS 2011

作者： Zimmer, Henning Bruhn, Andrés Weickert, Joachim Mathematical Image Analysis Group Faculty of Mathematics and Computer Science Saarland University Saarbrücken Germany Vision and Image Processing Group Cluster of Excellence Multimodal Computing and Interaction Saarland University Saarbrücken Germany

Despite their high popularity, common high dynamic range (HDR) methods are still limited in their practical applicability: They assume that the input images are perfectly aligned, which is often violated in practise. Our paper does not only free the user from this unrealistic limitation, but even turns the missing alignment into an advantage: By exploiting the multiple exposures, we can create a super-resolution image. The alignment step is performed by a modern energy-based optic flow approach that takes into account the varying exposure conditions. Moreover, it produces dense displacement fields with subpixel precision. As a consequence, our approach can handle arbitrary complex motion patterns, caused by severe camera shake and moving objects. Additionally, it benefits from several advantages over existing strategies: (i) It is robust under outliers (noise, occlusions, saturation problems) and allows for sharp discontinuities in the displacement field, (ii) The alignment step neither requires camera calibration nor knowledge of the exposure times. (Hi) It can be efficiently implemented on CPU and GPU architectures. After the alignment is performed, we use the obtained subpixel accurate displacement fields as input for an energy-based, joint super-resolution and HDR (SR-HDR) approach. It introduces robust data terms and anisotropic smoothness terms in the SR-HDR literature. Our experiments with challenging real world data demonstrate that these novelties are pivotal for the favourable performance of our approach. © 2010 The Author(s).

关键词： Pixels

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Experiences with planning for natural language generation

Experiences with planning for natural language generation

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作者： Koller, Alexander Petrick, Ronald P. A. Cluster of Excellence Multimodal Computing and Interaction Saarland University Postfach 151150 66041 Saarbrücken Germany School of Informatics University of Edinburgh 10 Crichton Street Edinburgh EH8 9AB United Kingdom

Natural language generation (NLG) is a major subfield of computational linguistics with a long tradition as an application area of automated planning systems. While current mainstream approaches have largely ignored the planning approach to NLG, several recent publications have sparked a renewed interest in this area. In this article, we investigate the extent to which these new NLG approaches profit from the advances in planner expressiveness and efficiency. Our findings are mixed. While modern planners can readily handle the search problems that arise in our NLG experiments, their overall runtime is often dominated by the grounding step they perform as preprocessing. Furthermore, small changes in the structure of a domain can significantly shift the balance between search and preprocessing. Overall, our experiments show that the off-the-shelf planners we tested are unusably slow for nontrivial NLG problem instances. As a result, we offer our domains and experiences as challenges for the planning community. © 2011 Wiley Periodicals, Inc.

关键词： Planning

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IUI 2011 workshop on location awareness for mixed and dual reality (LAMDa) 11

IUI 2011 workshop on location awareness for mixed and dual r...

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2011 15th ACM International Conference on Intelligent User Interfaces, IUI'11

作者： Kahl, Gerrit Schwartz, Tim Nurmi, Petteri Brandherm, Boris Dim, Eyal Forsblom, Andreas German Research Center for Artificial Intelligence Campus D3 66123 Saarbruecken Germany Cluster of Excellence - Multimodal Computing and Interaction Campus E1-1 66123 Saarbruecken Germany Helsinki Institute for Information Technology HIIT University of Helsinki P.O. Box 68 FI-00014 Finland German Research Center for Artificial Intelligence Campus D3-2 66123 Saarbruecken Germany MIS Department University of Haifa Mount Carmel Haifa Israel

ISBN: (纸本)9781450304191

The LAMDa workshop aims atdiscussing the impact of Dual Reality (DR) and Mixed Reality (MR) on location awareness and other applications in smart environments. Virtual environments - which are an essential part of dual and mixed realities - can be used to create new applications and to enhance already existing applications in the real world. On the other hand, existing sensors in the real world can be used to enhance the virtual world as well. The combination of both worlds can be well illustrated by location-based services, such as location-based advertising.

关键词： Location based services

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Local danger warnings for drivers: The effect of modality and level of assistance on driver reaction 10

Local danger warnings for drivers: The effect of modality an...

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14th ACM International Conference on Intelligent User Interfaces, IUI 2010

作者： Cao, Yujia Mahr, Angela Castronovo, Sandro Theune, Mariët Stahl, Christoph Müller, Christian A. Human Media Interaction University of Twente P.O. Box 217 7500 AE Enschede Netherlands German Research Center for Artificial Intelligence Building D32 Campus Saarbrucken Germany Cluster of Excellence-Multimodal Computing and Interaction Saarland University Germany

ISBN: (纸本)9781605585154

Local danger warning is an important function of Advanced Driver Assistance Systems (ADAS) to improve the safety of driving. The user interface (the warning presentation) is particularly crucial to a successful danger avoidance. We present a user study investigating various warning presentations using a scenario of emergent road obstacles. Two presentation factors were selected: modality and level of assistance. The modality factor had 4 variants: speech warning, visual and speech warning, visual warning with blinking cue, and visual warning with sound cue. The level of assistance varied between with or without action suggestions (AS). In accordance with the ISO usability model, a total of 6 measurements were derived to assess the effectiveness and efficiency of the warnings and the drivers' satisfaction. Results indicate that the combination of speech and visual modality leads to the best performance as well as the highest satisfaction. In contrast, purely auditory and purely visual modalities were both insufficient for presenting high-priority warnings. AS generally improved the usability of the warnings especially when they were accompanied by supporting information so that drivers could validate the suggestions. Copyright 2010 ACM.

关键词： Advanced driver assistance systems

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Making chroma features more robust to timbre changes

Making chroma features more robust to timbre changes

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Meinard Muller Sebastian Ewert Sebastian Kreuzer Cluster of Excellence on Multimodal Computing and Interaction (MMCI) University of Saarland Saarbruecken Germany Rheinische Friedrich-Wilhelms-Universitat Bonn Bonn Nordrhein-Westfalen DE Informatik III Universität Bonn Bonn Germany

Chroma-based audio features are a well-established tool for analyzing and comparing music data. By identifying spectral components that differ by a musical octave, chroma features show a high degree of invariance to variations in timbre. In this paper, we describe a novel procedure for making chroma features even more robust to changes in timbre and instrumentation while keeping their discriminative power. Our idea is based on the generally accepted observation that the lower mel-frequency cepstral coefficients (MFCCs) are closely related to timbre. Now, instead of keeping the lower coefficients, we discard them and only keep the upper coefficients. Furthermore, using a pitch scale instead of a mel scale allows us to project the remaining coefficients onto the twelve chroma bins. Our systematic experiments show that the resulting chroma features have indeed gained a significant boost towards timbre invariance.

关键词： Robustness Timbre Instruments Music information retrieval Cepstrum Cepstral analysis Mel frequency cepstral coefficient Content based retrieval Harmonic analysis Decorrelation

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Focused Retrieval of Content and Structure 1

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丛书名： Lecture Notes in Computer Science

1000年

作者： Shlomo Geva Jaap Kamps Ralf Schenkel

ISBN: (数字)9783642357343

ISBN: (纸本)9783642357336

This book constitutes the thoroughly refereed post-workshop proceedings of the 10th International Workshop of the Initiative for the Evaluation of XML Retrieval, INEX 2011, held in Saarbrücken, Germany, in December 2011. The 33 revised full papers presented were carefully reviewed and selected for presentation at the workshop from 36 submissions. The papers are organized in 5 research tracks on book and social search, Xdata centric, question answering, relevance feedback, and snippet retrieval.

关键词： Data Mining and Knowledge Discovery Information Storage and Retrieval Database Management Information Systems Applications (incl. Internet) Data Storage Representation Data Structures

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