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GVU Technical Report Series

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Author: Abowd, Gregory D. × Author: Rehg, James M. ×

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Sound Source Localization in Domestic Environment

2004 , Bian, Xuehai , Rehg, James M. , Abowd, Gregory D.

Sound source localization strategies can be traced back to radar and sonar localization systems. In the report, we will review the main challenges of sound source, especially talker, localization problem and current major strategies. We proposed a practical peak-weighted PHAT TDOA method to find reliable source location in the Awarehome, which is a residential lab in Georgia Tech. Finally, we suggest the application scenarios in domestic environment and provide future direction of our work.

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Virtual Rear Projection: An Empirical Study of Shadow Elimination for Large Upright Displays

2003 , Summet, Jay W. , Abowd, Gregory D. , Corso, Gregory M. , Rehg, James M.

Rear projection of large-scale upright displays is often preferred over front projection because of the elimination of shadows that occlude the projected image. However, rear projection is not always a feasible option for space and cost reasons. Recent research suggests that many of the desirable features of rear projection, in particular shadow elimination, can be reproduced using new front projection techniques. We report on an empirical study to determine how two of these new projection techniques compare with traditional rear projection and front projection, with the hope of motivating the continued advance of improved virtual rear projection techniques.

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Using Sound Source Localization to Monitor and Infer Activities in the Home

2004 , Bian, Xuehai , Abowd, Gregory D. , Rehg, James M.

Recent research in ubiquitous computing has focused both on how to infer human activity from a variety of signals sensed in the environment as well as how to use that information to support interactions. In this paper, we examine the feasibility and usefulness of sound source localization (SSL) in a home environment, which is an implicit location system to support monitoring of a remote space as well as to infer key activities, such as face-to-face conversations. We present a microphone array system that covers a significant portion of the public space in a realistic home setting and discuss monitoring and automated inferring applications that are made possible with this technology in a domestic setting.

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Interactive Walls: Addressing the Challenges of Large-scale Interactive Surfaces

2002 , Summet, Jay W. , Somani, Ramswaroop , Abowd, Gregory D. , Rehg, James M.

We present a prototype large-scale interactive electronic whiteboard wall. Various input, output and vision technologies are used to create a surface that can capture digital ink as well as support pen-based interaction with displayed information on subregions of the wall. A simple automated capture application is demonstrated on our prototype surface and research challenges for developing more complex applications with this interactive technology are discussed.

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Virtual Rear Projection: A Comparison Study of Projection Technologies for Large Interactive Displays

2003 , Summet, Jay W. , Abowd, Gregory D. , Corso, Gregory M. , Rehg, James M.

Rear projection of large-scale upright displays is often preferred over front projection because of the elimination of shadows that occlude the projected image. However, rear projection is not always a feasible option for space and cost reasons. Recent research suggests that many of the desirable features of rear projection, in particular shadow elimination, can be reproduced using new front projection techniques. We report on an empirical study to determine how two of these new projection techniques compare with traditional rear projection and front projection, with the hope of motivating the continued advance of improved virtual rear projection techniques.

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