Now showing items 1-8 of 8

    • Activity Zones for Context-Aware Computing 

      Koile, Kimberle; Tollmar, Konrad; Demirdjian, David; Shrobe, Howard; Darrell, Trevor (2003-06-10)
      Location is a primary cue in many context-aware computing systems, and is often represented as a global coordinate, room number, or Euclidean distance various landmarks. A user?s concept of location, however, is often ...
    • Exploring Vision-Based Interfaces: How to Use Your Head in Dual Pointing Tasks 

      Darrell, Trevor; Checka, Neal; Oh, Alice; Morency, Louis-Philippe (2002-01-01)
      The utility of vision-based face tracking for dual pointing tasks is evaluated. We first describe a 3-D face tracking technique based on real-time parametric motion-stereo, which is non-invasive, robust, and self-initialized. ...
    • Fast Contour Matching Using Approximate Earth Mover's Distance 

      Grauman, Kristen; Darrell, Trevor (2003-12-05)
      Weighted graph matching is a good way to align a pair of shapes represented by a set of descriptive local features; the set of correspondences produced by the minimum cost of matching features from one shape to the features ...
    • Fast Pose Estimation with Parameter Sensitive Hashing 

      Shakhnarovich, Gregory; Viola, Paul; Darrell, Trevor (2003-04-18)
      Example-based methods are effective for parameter estimation problems when the underlying system is simple or the dimensionality of the input is low. For complex and high-dimensional problems such as pose estimation, ...
    • Inferring 3D Structure with a Statistical Image-Based Shape Model 

      Grauman, Kristen; Shakhnarovich, Gregory; Darrell, Trevor (2003-04-17)
      We present an image-based approach to infer 3D structure parameters using a probabilistic "shape+structure'' model. The 3D shape of a class of objects may be represented by sets of contours from silhouette views ...
    • Light Field Morphable Models 

      Christoudias, Chris Mario; Morency, Louis-Philippe; Darrell, Trevor (2003-04-18)
      Statistical shape and texture appearance models are powerful image representations, but previously had been restricted to 2D or simple 3D shapes. In this paper we present a novel 3D morphable model based on image-based ...
    • Range Segmentation Using Visibility Constraints 

      Taycher, Leonid; Darrell, Trevor (2001-09-01)
      Visibility constraints can aid the segmentation of foreground objects observed with multiple range images. In our approach, points are defined as foreground if they can be determined to occlude some {em empty space} in the ...
    • Virtual Visual Hulls: Example-Based 3D Shape Estimation from a Single Silhouette 

      Grauman, Kristen; Shakhnarovich, Gregory; Darrell, Trevor (2004-01-28)
      Recovering a volumetric model of a person, car, or other object of interest from a single snapshot would be useful for many computer graphics applications. 3D model estimation in general is hard, and currently requires ...