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  1. Proceedings of the 2nd international symposium on Non-photorealistic animation and rendering (NPAR '02)
  2. An invitation to discuss computer depiction
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An invitation to discuss computer depiction

Content Provider ACM Digital Library
Author Durand, Frédo
Abstract This paper draws from art history and perception to place computer depiction in the broader context of picture production. It highlights the often underestimated complexity of the interactions between features in the picture and features of the represented scene. Depiction is not always a unidirectional projection from a 3D scene to a 2D picture, but involves much feedback and influence from the picture space to the object space. Depiction can be seen as a pre-existing 3D reality projected onto 2D, but also as a 2D pictorial representation that is superficially compatible with an hypothetic 3D scene. We show that depiction is essentially an optimization problem, producing the best picture given goals and constraints.We introduce a classification of basic depiction techniques based on four kinds of issue. The spatial system deals with the mapping of spatial properties between 3D and 2D (including, but not restricted to, perspective projection). The primitive system deals with the dimensionality and mappings between picture primitives and scene primitives. Attributes deal with the assignment of visual properties such as colors, texture, or thickness. Finally, marks are the physical implementations of the picture (e.g. brush strokes, mosaic cells). A distinction is introduced between interaction and picture-generation methods, and techniques are then organized depending on the dimensionality of the inputs and outputs.
Starting Page 111
Ending Page 124
Page Count 14
File Format PDF
ISBN 1581134940
DOI 10.1145/508530.508550
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2002-06-03
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Computer depiction Visual arts Interaction Non-photorealistic rendering Perception
Content Type Text
Resource Type Article
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