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      • Scholarly Publications
      • Faculty of Economics, Administrative And Social Sciences
      • Department of Psychology
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      Rapid inference of object rigidity and reflectance using optic flow

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      Author
      Zang, D.
      Doerschner, Katja
      Schrater P.R.
      Date
      2009
      Source Title
      Computer Analysis of Images and Patterns
      Print ISSN
      0302-9743
      Publisher
      Springer, Berlin, Heidelberg
      Volume
      5702
      Pages
      881 - 888
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      167
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      Abstract
      Rigidity and reflectance are key object properties, important in their own rights, and they are key properties that stratify motion reconstruction algorithms. However, the inference of rigidity and reflectance are both difficult without additional information about the object's shape, the environment, or lighting. For humans, relative motions of object and observer provides rich information about object shape, rigidity, and reflectivity. We show that it is possible to detect rigid object motion for both specular and diffuse reflective surfaces using only optic flow, and that flow can distinguish specular and diffuse motion for rigid objects. Unlike nonrigid objects, optic flow fields for rigid moving surfaces are constrained by a global transformation, which can be detected using an optic flow matching procedure across time. In addition, using a Procrustes analysis of structure from motion reconstructed 3D points, we show how to classify specular from diffuse surfaces. © 2009 Springer Berlin Heidelberg.
      Keywords
      Optic flow
      Reflectance classification
      Rigidity detection
      Specular motion
      Across time
      Diffuse surfaces
      Global transformation
      Key object
      Motion reconstruction
      Moving surfaces
      Non-rigid objects
      Object shape
      Optic flow
      Procrustes analysis
      Reflectance classification
      Reflective surfaces
      Relative motion
      Rigid objects
      Specular motion
      Structure from motion
      Image analysis
      Reflection
      Rigidity
      Three dimensional
      Permalink
      http://hdl.handle.net/11693/26732
      Published Version (Please cite this version)
      http://dx.doi.org/10.1007/978-3-642-03767-2_107
      https://doi.org/10.1007/978-3-642-03767-2
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      • Department of Psychology 170
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