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  Curvature discontinuities are cues for rapid shape analysis

Kristjansson, A., & Tse, P. (2001). Curvature discontinuities are cues for rapid shape analysis. Perception and Psychophysics, 63(3), 390-403. doi:10.3758/BF03194407.

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Kristjansson, A, Author
Tse, PU1, 2, Author              
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1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Using the visual search method, we show that stimuli that contain curvature discontinuities (i.e., points where the second derivative along an image contour is not defined) are easily found among stimuli containing only smooth changes in curvature. Curved stimuli that lack curvature discontinuities, however, are difficult to find among distractors that have them. These results suggest that the visual system detects and analyzes abrupt changes in curvature in the image quickly to extract vital information about the 3-D structure of the visual environment.

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 Dates: 2001-04
 Publication Status: Published in print
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 Identifiers: DOI: 10.3758/BF03194407
BibTex Citekey: 44
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Title: Perception and Psychophysics
Source Genre: Journal
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Publ. Info: Austin, Tex., etc. : Psychonomic Society, etc.
Pages: - Volume / Issue: 63 (3) Sequence Number: - Start / End Page: 390 - 403 Identifier: ISSN: 0031-5117
CoNE: https://pure.mpg.de/cone/journals/resource/954925432372