BibTex Entry:

  author  = { Winnem{\"o}ller, Holger and Kyprianidis, Jan Eric and Olsen, Sven C.},
  title   = { XDoG: An eXtended difference-of-Gaussians compendium including
              advanced image stylization },
  journal = { Computers \& Graphics },
  volume  = { 36 },
  number  = { 6 },
  pages   = { 740--753 },
  year    = { 2012 },
  doi     = { 10.1016/j.cag.2012.03.004 },
  abstract = {Recent extensions to the standard difference-of-Gaussians (DoG) edge detection operator have rendered it less 
	susceptible to noise and increased its aesthetic appeal. Despite these advances, the technical subtleties and 
	stylistic potential of the DoG operator are often overlooked. This paper offers a detailed review of the DoG 
	operator and its extensions, highlighting useful relationships to other image processing techniques. It also 
	presents many new results spanning a variety of styles, including pencil-shading, pastel, hatching, and 
	woodcut. Additionally, we demonstrate a range of subtle artistic effects, such as ghosting, speed-lines, 
	negative edges, indication, and abstraction, all of which are obtained using an extended DoG formulation, or 
	slight modifications thereof. In all cases, the visual quality achieved by the extended DoG operator is 
	comparable to or better than those of systems dedicated to a single style.},