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School of Interactive Computing Technical Report Series

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Type: Text × Author: Essa, Irfan ×

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    Localization and 3D Reconstruction of Urban Scenes Using GPS
    (Georgia Institute of Technology, 2008) Kim, Kihwan ; Summet, Jay ; Starner, Thad ; Ashbrook, Daniel ; Kapade, Mrunal ; Essa, Irfan
    Using off-the-shelf Global Positioning System (GPS) units, we reconstruct buildings in 3D by exploiting the reduction in signal to noise ratio (SNR) that occurs when the buildings obstruct the line-of-sight between the moving units and the orbiting satellites. We measure the size and height of skyscrapers as well as automatically constructing a density map representing the location of multiple buildings in an urban landscape. If deployed on a large scale, via a cellular service provider’s GPS-enabled mobile phones or GPS-tracked delivery vehicles, the system could provide an inexpensive means of continuously creating and updating 3D maps of urban environments.
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    Remixing Authorship: Reconfiguring the Author in Online Video Remix Culture
    (Georgia Institute of Technology, 2007) Diakopoulos, Nicholas ; Luther, Kurt ; Medynskiy, Yevgeniy (Eugene) ; Essa, Irfan
    In an abstract sense, authorship entails the constrained selection or generation of media and the organization and layout of that media in a larger structure. But authorship is more than just selection and organization; it is a complex construct incorporating concepts of originality, authority, intertextuality, and attribution. In this paper we explore these concepts as they relate to authorship and ask how they are changing in light of modes of collaborative authorship in remix culture. A detailed qualitative study of an online video remixing site is presented to help understand how the constraints of that environment are impacting authorial constructs. We discuss users’ self-conceptions as authors, and how values related to authorship are reflected to users through the interface and design of the site’s remixing and community tools. Finally, we present some implications of this work for the design of online communities for collaborative media creation and remixing.