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Generating Semantic Descriptions From Drawings of Scenes With Shadows

Author(s)
Waltz, David L.
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Abstract
The research reported here concerns the principles used to automatically generate three-dimensional representations from line drawings of scenes. The computer programs involved look at scenes which consist of polyhedra and which may contain shadows and various kinds of coincidentally aligned scene features. Each generated description includes information about edge shape (convex, concave, occluding, shadow, etc.), about the type of illumination for each region (illuminated, projected shadow, or oriented away from the light source), and about the spacial orientation of regions. The methods used are based on the labeling schemes of Huffman and Clowes; this research provides a considerable extension to their work and also gives theoretical explanations to the heuristic scene analysis work of Guzman, Winston, and others.
Date issued
1972-11-01
URI
http://hdl.handle.net/1721.1/6911
Other identifiers
AITR-271
Series/Report no.
AITR-271

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  • AI Technical Reports (1964 - 2004)

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