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== Reference ==
Elodie Fourquet: Learning about Shadows from Artists. In: Pauline Jepp, Oliver Deussen (Eds.): Eurographics Workshop on Computational Aesthetics, 2010. 107-114

== DOI ==
http://dx.doi.org/10.2312/COMPAESTH/COMPAESTH10/107-114

== Abstract ==
Renaissance artists discovered methods for imaging realistic depth on a two dimensional surface by re-inventing linear perspective. In solving the problem of depth depiction, they observed how shadows project and volumes flatten in nature. They investigated how controlled illumination projects volumes onto walls, exploring the phenomena long before physical optics, such as the camera, existed. This paper specifically examines artists' constructions for depicting shadows, a 3D double projection problem that artists solved completely within two dimensions. The larger goal is to develop new computational methods for creating 3D perceptions without having to leave the 2D canvas. Those methods have potential application in constructing user interfaces, in 2D image compositing and in simultaneous 2D/3D composition. This paper develops geometric constructions for casting shadows onto planar surfaces, adapted from artists' methods. Their algebraization for integration into imaging software is demonstrated, and their optically accuracy is shown. Finally, resulting images are included, along with a discussion of limitations.

== Extended Abstract ==

== Bibtex ==

== Used References ==
Ronen Barzel, Lighting controls for computer cinematography, Journal of Graphics Tools, v.2 n.1, p.1-20, 1997 http://dx.doi.org/10.1080/10867651.1997.10487467

J. Blinn, Me and My (Fake) Shadow, IEEE Computer Graphics and Applications, v.8 n.1, p.82-86, January 1988 http://dl.acm.org/citation.cfm?id=44111&CFID=588525319&CFTOKEN=29804931

CAVANAGH P., LECLERC Y. G.: Shape from shadows. Journal of Experimental Psychology: Human Perception and Performance. 15, 1 (February 1989), 3-27.

COLE R. V.: Perspective: The Practice & Theory of Perspective as Applied to Pictures, with a Section Dealing with Its Application to Architecture. Seeley, Service & Co, 1921.

COXETER H. S. M.: Projective Geometry. Springer-Verlag, New York, 1974.

Christopher DeCoro , Forrester Cole , Adam Finkelstein , Szymon Rusinkiewicz, Stylized shadows, Proceedings of the 5th international symposium on Non-photorealistic animation and rendering, August 04-05, 2007, San Diego, California http://doi.acm.org/10.1145/1274871.1274884

Elodie Fourquet , William Cowan , Stephen Mann, On the empirical limits of billboard rotation, Proceedings of the 4th symposium on Applied perception in graphics and visualization, July 25-27, 2007, Tubingen, Germany http://doi.acm.org/10.1145/1272582.1272591

Elodie Fourquet, Composition in perspectives, Proceedings of the Fourth Eurographics conference on Computational Aesthetics in Graphics, Visualization and Imaging, June 18-20, 2008, Lisbon, Portugal http://dx.doi.org/10.2312/COMPAESTH/COMPAESTH08/009-016

HUSLEY K.: Adobe Illustrator & Photoshop Tutorials & Lessons. http://www.khulsey.com/demo_1howto.html, accessed on April 2010, 2010.

Richard Hartley , Andrew Zisserman, Multiple View Geometry in Computer Vision, Cambridge University Press, New York, NY, 2003 http://dl.acm.org/citation.cfm?id=861369&CFID=588525319&CFTOKEN=29804931

William B. Kerr , Fabio Pellacini, Toward evaluating lighting design interface paradigms for novice users, ACM Transactions on Graphics (TOG), v.28 n.3, August 2009 http://doi.acm.org/10.1145/1531326.1531332

LOVELL P. G., GILCHRIST I. D., TOLHURST D. J., TROSCIANKO T.: Search for gross illumination discrepancies in images of natural objects. Journal of Vision 9, 1 (1 2009), 1-14.

Pierre Poulin , Alain Fournier, Lights from highlights and shadows, Proceedings of the 1992 symposium on Interactive 3D graphics, p.31-38, June 1992, Cambridge, Massachusetts, USA http://doi.acm.org/10.1145/147156.147160

Lena Petrović , Brian Fujito , Lance Williams , Adam Finkelstein, Shadows for cel animation, Proceedings of the 27th annual conference on Computer graphics and interactive techniques, p.511-516, July 2000 http://doi.acm.org/10.1145/344779.345073

Fabio Pellacini , Parag Tole , Donald P. Greenberg, A user interface for interactive cinematic shadow design, Proceedings of the 29th annual conference on Computer graphics and interactive techniques, July 23-26, 2002, San Antonio, Texas http://doi.acm.org/10.1145/566570.566617

Amit Shesh , Antonio Criminisi , Carsten Rother , Gavin Smyth, 3D-aware image editing for out of bounds photography, Proceedings of Graphics Interface 2009, May 25-27, 2009, Kelowna, British Columbia, Canada http://dl.acm.org/citation.cfm?id=1555898&CFID=588525319&CFTOKEN=29804931

STILLWELL J.: The Four Pillars of Geometry. Springer, 2005.

WILLIAMS L.: Shading in two dimensions. In GI '91: Proceedings of Graphics Interface 1991 (1991), pp. 143-151.

== Links ==
=== Full Text ===
http://www.cgl.uwaterloo.ca/~ecdfourq/shadow/FourquetCAE2010.pdf

[[intern file]]

=== Sonstige Links ===
http://dl.acm.org/citation.cfm?id=2381312.2381332&coll=DL&dl=GUIDE&CFID=588525319&CFTOKEN=29804931

@@ Zeile 13: / Zeile 13: @@
 == Bibtex ==
 == Used References ==
- 	Ronen Barzel, Lighting controls for computer cinematography, Journal of Graphics Tools, v.2 n.1, p.1-20, 1997  http://dx.doi.org/10.1080/10867651.1997.10487467
+Ronen Barzel, Lighting controls for computer cinematography, Journal of Graphics Tools, v.2 n.1, p.1-20, 1997  http://dx.doi.org/10.1080/10867651.1997.10487467
 J. Blinn, Me and My (Fake) Shadow, IEEE Computer Graphics and Applications, v.8 n.1, p.82-86, January 1988 http://dl.acm.org/citation.cfm?id=44111&CFID=588525319&CFTOKEN=29804931

Learning about Shadows from Artists - Versionsgeschichte

Gubachelier am 8. November 2015 um 16:58 Uhr

Gbachelier: Die Seite wurde neu angelegt: „ == Reference == Elodie Fourquet: Learning about Shadows from Artists. In: Pauline Jepp, Oliver Deussen (Eds.): Eurographics Workshop on Computational Aesthet…“