Shadows for Cel Animation

Lena Petrović, Brian Fujito, Lance Williams, Adam Finkelstein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a semi-automatic method for creating shadow mattes in cel animation. In conventional cel animation, shadows are drawn by hand, in order to provide visual cues about the spatial relationships and forms of characters in the scene. Our system creates shadow mattes based on hand-drawn characters, given high-level guidance from the user about depths of various objects. The method employs a scheme for “inflating” a 3D figure based on hand-drawn art. It provides simple tools for adjusting object depths, coupled with an intuitive interface by which the user specifies object shapes and relative positions in a scene. Our system obviates the tedium of drawing shadow mattes by hand, and provides control over complex shadows falling over interesting shapes.

Original languageEnglish (US)
Title of host publicationSIGGRAPH 2000 - Proceedings of the 27th Annual Conference on Computer Graphics and Interactive Techniques
PublisherAssociation for Computing Machinery, Inc
Pages511-516
Number of pages6
ISBN (Electronic)1581132085, 9781581132083
DOIs
StatePublished - Jul 1 2000
Event27th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 2000 - New Orleans, United States
Duration: Jul 23 2000Jul 28 2000

Publication series

NameSIGGRAPH 2000 - Proceedings of the 27th Annual Conference on Computer Graphics and Interactive Techniques

Conference

Conference27th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 2000
Country/TerritoryUnited States
CityNew Orleans
Period7/23/007/28/00

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design
  • Computer Vision and Pattern Recognition
  • Human-Computer Interaction

Keywords

  • cel animation
  • inflation
  • NPR
  • Shadows
  • sketching

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