Journal article

SÝKORA Daniel, KAVAN Ladislav, ČADÍK Martin, JAMRIŠKA Ondřej, JACOBSON Alec, WHITED Brian, SIMMONS Maryann and SORKINE-HORNUNG Olga. Ink-and-Ray: Bas-Relief Meshes for Adding Global Illumination Effects to Hand-Drawn Characters. ACM Transactions on Graphics (TOG). New York City: Association for Computing Machinery, 2014, vol. 2014, no. 2, pp. 1-16. ISSN 0730-0301. Available from:
Publication language:english
Original title:Ink-and-Ray: Bas-Relief Meshes for Adding Global Illumination Effects to Hand-Drawn Characters
Title (cs):Ink-and-Ray: basreliéfové sítě pro přidání globálního osvětlení do ručně kreslených postav
Journal:ACM Transactions on Graphics (TOG), Vol. 2014, No. 2, New York City, US
cartoons, global illumination, non-photorelasitic rendering, 2D-to-3D conversion, bas-relief
We present a new approach for generating global illumination renderings of hand-drawn characters using only a small set of simple annotations. Our system exploits the concept of bas-relief sculptures, making it possible to generate 3D proxies suitable for rendering without requiring side-views or extensive user input. We formulate an optimization process that automatically constructs approximate geometry sufficient to evoke the impression of a consistent 3D shape. The resulting renders provide the richer stylization capabilities of 3D global illumination while still retaining the 2D hand-drawn look-and-feel. We demonstrate our approach on a varied set of hand-drawn images and animations, showing that even in comparison to ground-truth renderings of full 3D objects, our bas-relief approximation is able to produce convincing global illumination effects, including self-shadowing, glossy reflections, and diffuse color bleeding.
   author = {Daniel S{\'{y}}kora and Ladislav Kavan and Martin
	{\v{C}}ad{\'{i}}k and Ond{\v{r}}ej Jamri{\v{s}}ka and Alec
	Jacobson and Brian Whited and Maryann Simmons and Olga
   title = {Ink-and-Ray: Bas-Relief Meshes for Adding Global
	Illumination Effects to Hand-Drawn Characters},
   pages = {1--16},
   journal = {ACM Transactions on Graphics (TOG)},
   volume = {2014},
   number = {2},
   year = {2014},
   ISSN = {0730-0301},
   doi = {10.1145/2591011},
   language = {english},
   url = {}

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