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@InProceedings{IEEEVR07-tds, 
  author =      {Joseph L. Gabbard and J. Edward {Swan~II} and Deborah Hix and 
                 Si-Jung Kim and Greg Fitch}, 
  title =       {Active Text Drawing Styles for Outdoor Augmented Reality: A User-Based 
                 Study and Design Implications}, 
  booktitle =   {Technical Papers, Proceedings of IEEE Virtual Reality 2007}, 
  year =        2007, 
  location =    {Charlotte, North Carolina, USA}, 
  date =        {March 10--14}, 
  month =       {March}, 
  pages =       {35--42}, 
  abstract =    { 
A challenge in presenting augmenting information in outdoor augmented reality 
(AR) settings lies in the broad range of un-controllable environmental 
conditions that may be present, specifically large-scale fluctuations in natural 
lighting and wide variations in likely backgrounds or objects in the scene.  In 
this paper, we present a active AR testbed that samples the user's field of 
view, and collects outdoor illuminance values at the participant's position. 
The main contribution presented herein is a user-based study (conducted using 
the testbed) that examined the effects on user performance of four outdoor 
background textures, four text colors, three text drawing styles, and two text 
drawing style algorithms for a text identification task using an optical, 
see-through AR system.  We report significant effects for all these variables, 
and discuss design guidelines and ideas for future work. 
}, 
}