IEEE Computer Graphics and Applications
Lights from highlights and shadows
I3D '92 Proceedings of the 1992 symposium on Interactive 3D graphics
Lighting controls for computer cinematography
Journal of Graphics Tools
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
A user interface for interactive cinematic shadow design
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Multiple View Geometry in Computer Vision
Multiple View Geometry in Computer Vision
On the empirical limits of billboard rotation
Proceedings of the 4th symposium on Applied perception in graphics and visualization
Proceedings of the 5th international symposium on Non-photorealistic animation and rendering
Toward evaluating lighting design interface paradigms for novice users
ACM SIGGRAPH 2009 papers
3D-aware image editing for out of bounds photography
Proceedings of Graphics Interface 2009
Computational Aesthetics'08 Proceedings of the Fourth Eurographics conference on Computational Aesthetics in Graphics, Visualization and Imaging
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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.