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  Extracting and depicting the 3D shape of specular surfaces

Weidenbacher, U., Bayerl, P., Fleming, R., & Neumann, H. (2005). Extracting and depicting the 3D shape of specular surfaces. In H. Bülthoff, & T. Troscianko (Eds.), 2nd Symposium on Applied Perception in Graphics and Visualization (pp. 83-86). New York, NY, USA: ACM Press.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D4B5-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-0E02-A
Genre: Conference Paper

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https://dl.acm.org/citation.cfm?id=1080416 (Publisher version)
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 Creators:
Weidenbacher, U, Author
Bayerl, P, Author
Fleming, R1, 2, 3, Author              
Neumann, H, Author
Affiliations:
1Research Group Computational Vision and Neuroscience, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497805              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Many materials including water, plastic and metal have specular surface characteristics. Specular reflections have commonly been considered a nuisance for the recovery of object shape. However, the way that reflections are distorted across the surface depends crucially on 3D curvature, suggesting that they could in fact be a useful source of information. Indeed, observers can have a vivid impression of 3D shape when an object is perfectly mirrored (i.e. the image contains nothing but specular reflections). This leads to the question what are the underlying mechanisms of our visual system to extract this 3D shape information from a perfectly mirrored object. In this paper we propose a biologically motivated recurrent model for the extraction of visual features relevant for the perception of 3D shape information from images of mirrored objects. We analyze qualitatively and quantitatively the results of computational model simulations and show that bidirectional recurrent information processing leads to better results then pure feedforward processing. Furthermore we utilize the model output to create a rough non-photorealistic sketch representation of a mirrored object, which emphasizes image features that are mandatory for 3D shape perception (e.g. occluding contour, regions of high curvature). Moreover, this sketch illustrates that the model generates a representation of object features independent of the surrounding scene reflected in the mirrored object.

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 Dates: 2005-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1145/1080402.1080416
BibTex Citekey: 4659
 Degree: -

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Title: 2nd Symposium on Applied Perception in Graphics and Visualization (APGV 2005)
Place of Event: A Coroña, Spain
Start-/End Date: 2005-08-26 - 2005-08-28

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Title: 2nd Symposium on Applied Perception in Graphics and Visualization
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Troscianko, T, Editor
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Publ. Info: New York, NY, USA : ACM Press
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 83 - 86 Identifier: ISBN: 1-59593-139-2