Browsing by Author "Wolfe, Christopher"

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    A low-cost infrastructure for tabletop games
    (ACM, 2008) Wolfe, Christopher; Smith, J. David; Graham, T.C. Nicholas
    Tabletop games provide an intimate gaming experience where groups of friends can interact in a shared space using shared physical props. Digital tabletop games show great promise in bringing this experience to video game players. However the cost of developing tabletop games is high due to the need for expensive hardware and complex software. In this paper, we introduce EquisFTIR, a low-cost hardware and software infrastructure for digital tabletop gaming. We illustrate the infrastructure through Asterocks, a novel tabletop game.
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    Seeing through the Fog: An Algorithm for Fast and Accurate Touch Detection in Optical Tabletop Surfaces
    (ACM, 2010) Wolfe, Christopher; Graham, T.C.Nicholas; Pape, Joseph A.
    Fast and accurate touch detection is critical to the usability of multi-touch tabletops. In optical tabletops, such as those using the popular FTIR and DI technologies, this requires efficient and effective noise reduction to enhance touches in the camera's input. Common approaches to noise reduction do not scale to larger tables, leaving designers with a choice between accuracy problems and expensive hardware. In this paper, we present a novel noise reduction algorithm that provides better touch recognition than current alternatives, particularly in noisy environments, without imposing higher computational cost. We empirically compare our algorithm to other noise reduction approaches using data collected from tabletops at research labs in Canada and Europe.