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Passive Aircraft Altitude Estimation using Computer Vision
Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
2000 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

This thesis presents a number of methods to estimate 3D structures with a single translating camera. The camera is assumed to be calibrated and to have a known translation and rotation.

Applications for aircraft altitude estimation and ground structure estimation ahead of the aircraft are discussed. The idea is to mount a camera on the aircraft and use the motion estimates obtained in the inertia navigation system. One reason for this arrangement is to make the aircraft more passive, in comparison to conventional radar based altitude estimation.

Two groups of methods are considered, optical flow based and region tracking based. Both groups have advantages and drawbacks.

Two methods to estimate the optical flow are presented. The accuracy of the estimated ground structure is increased by varying the temporal distance between the frames used in the optical flow estimation algorithms.

Four region tracking algorithms are presented. Two of them use canonical correlation and the other two are based on sum of squared difference and complex correlation respectively.

The depth estimates are then temporally filtered using weighted least squares or a Kalman filter.

A simple estimation of the computational complexity and memory requirements for the algorithms is presented to aid estimation of the hardware requirements.

Tests on real flight sequences are performed, showing that the aircraft altitude can be estimated with a good accuracy.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press , 2000. , 83 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 847
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-53415ISBN: 91-7219-827-3 (print)OAI: oai:DiVA.org:liu-53415DiVA: diva2:288278
Presentation
(English)
Supervisors
Available from: 2010-01-20 Created: 2010-01-20 Last updated: 2010-03-07Bibliographically approved

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Passive Aircraft Altitude Estimation using Computer Vision(3019 kB)710 downloads
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Moe, Anders

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf