@InProceedings{Secord:2002:FPDI,
    author      = "Adrian Secord and Wolfgang Heidrich and Lisa Streit",
    title       = "Fast primitive distribution for illustration",
    booktitle   = "Rendering Techniques 2002",
    note        = "Proc.\ 13th Eurographics Rendering Workshop, Pisa, Italy,
                   June~26--28, 2002",
    year        = "2002",
    editor      = "Paul Debevec and Simon Gibson",
    series      = "Eurographics",
    publisher   = "Springer-Verlag Wien New York",
    pages       = "215--226",
    abstract    = {
    In this paper we present a high-quality, image-space approach to
    illustration that preserves continuous tone by probabilistically
    distributing primitives while maintaining interactive rates.  Our method
    allows for frame-to-frame coherence by matching movements of primitives
    with changes in the input image.  It can be used to create a variety of
    drawing styles by varying the primitive type or direction.  We show that
    our approach is able to both preserve tone and (depending on the drawing
    style) high-frequency detail. Finally, while our algorithm requires only
    an image as input, additional 3D information enables the creation of a
    larger variety of drawing styles.  
    } 
}