@inproceedings{Secord:2002:WVS,
    author      = "Adrian Secord",
    title       = "Weighted {V}oronoi stippling",
    booktitle   = "Proceedings of the second international symposium on
                   Non-photorealistic animation and rendering",
    year        = 2002,
    pages       = "37--43",
    publisher   = "ACM Press",
    isbn        = "1-58113-494-0",
    location    = "Annecy, France",
    doi         = "http://doi.acm.org/10.1145/508530.508537",
    abstract = {
    The traditional artistic technique of \emph"stippling" places small dots
    of ink onto paper such that their density give the impression of tone.
    The artist tightly controls the relative placement of the stipples on the
    paper to produce even tones and avoid artifacts, leading to long creation
    times for the drawings.

    We present two non-interactive techniques for generating stipple drawings
    from grayscale images using weighted centroidal Voronoi diagrams.  An
    iterative technique acts on input images directly to produce high-quality
    stipple drawings and a real-time approach uses precomputed dot
    distributions to stipple images quickly.  
    }
}