Pen and Ink Pictures from Gray-Scale Photographs
Germán Arroyo, Domingo Martín.
EUROGRAPHICS 2003, Interactive Demos & Posters,
2003. [BibTeX]
Silhouette detection in volumetric models based on a non-photorealistic illumination system
Germán Arroyo, Francisco Velasco, Domingo Martín.
Computers & Graphics, Vol. 29, No. 2, pp. 209--216, April,
2005. [BibTeX]