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  Neural Mapping and Parallel Optical Flow Computation for Autonomous Navigation

Bülthoff, H., Little, J., & Mallot, H. (1988). Neural Mapping and Parallel Optical Flow Computation for Autonomous Navigation. Poster presented at International Neural Network Society First Annual Meeting (INNS 1988), Boston, MA, USA.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-EF3F-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-4912-4
Genre: Poster

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Bülthoff, HH1, Author              
Little, J, Author
Mallot, HA, Author              
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1External Organizations, ou_persistent22              

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 Abstract: In this paper, the authors present information processing strategies, derived from neurobiology, which facilitate the evaluation of optical flow data considerably. In most previous approaches, the extraction of motion data from varying image intensities is complicated by the so-called aperture and correspondence problems. The correspondence problem arises if motion detection is based on image features that have to be identified in subsequent frames. If this problem is avoided by continuously registering image intensity changes not necessarily corresponding to features, the motion signal obtained becomes ambiguous due to the aperture problem. Recently a new algorithm for the computation of optical flow has been developed that produces dense motion data which are not subject to the aperture problem. Once the velocity vector field is established, optical flow analysis has to deal with the global space-variance of this field which carries much of the information. Local detectors for divergence (looming) and curl, that can be used in tasks such as obstacle avoidance, produce space-variant results even in the absence of obstacles. Also, motion detection itself could be restricted to just one direction per site for certain information processing tasks, were it not for the space-variance of that direction. For observer motion on a planar surface, these problems can be overcome by a retinotopic mapping, or transform, applied to image coordinates which inverts the perspective for points on this surface.

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 Dates: 1988-09
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1016/0893-6080(88)90504-7
BibTex Citekey: 777
 Degree: -

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Title: International Neural Network Society First Annual Meeting (INNS 1988)
Place of Event: Boston, MA, USA
Start-/End Date: 1988-09-06 - 1988-09-10

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Title: Neural networks
Source Genre: Journal
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Publ. Info: New York : Pergamon
Pages: - Volume / Issue: 1 (Supplement 1) Sequence Number: - Start / End Page: 482 Identifier: ISSN: 0893-6080
CoNE: https://pure.mpg.de/cone/journals/resource/954925558496