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Understanding Line Drawings of Scenes with Shadows (1975)
| Venue: | The Psychology of Computer Vision |
| Citations: | 436 - 0 self |
BibTeX
@INPROCEEDINGS{Waltz75understandingline,
author = {David Waltz},
title = {Understanding Line Drawings of Scenes with Shadows},
booktitle = {The Psychology of Computer Vision},
year = {1975},
pages = {pages},
publisher = {McGraw-Hill}
}
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Abstract
this paper, how can we recognize the identity of Figs. 2.1 and 2.2? Do we use' learning and knowledge to interpret what we see, or do we somehow automatically see the world as stable and independent bf lighting? What portions of scenes can we understand from local features alone, and what configurations require the use of 1obal hypotheses? 19 In this essay I describe a working collection of computer programs which reconstruct three-dimensional descriptions from line drawings which are obtained from scenes composed of plane-faced objects under various lighting conditions. The system identifies shadow lines and regions, groups regions which belong to the same object, and notices such relations as contact or lack of contact between the objects, support and in-front-of/behind relations between the objects as well as information about the spatial orientation of various regions, all using the description it has generated
