Measuring time-to-contact using active camera control

W. Brent Seales

doi:10.1007/3-540-60268-2_407

Measuring time-to-contact using active camera control

W. Brent Seales

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

In this paper we use a simple, active-camera model to estimate the time-to-contact (TTC) of a moving object. We estimate TTC by enforcing a "uniform scale" constraint on the moving object. By actively adjusting the focal length of the pinhole model, the projected object maintains a fixed image scale regardless of its motion. These adjustments on the ideal pinhole focal length are translated into changes of the actual zoom and focus settings of a real camera system. We obtain improvements over a fixed-camera approach because the scale adjustment (zoom) improves image divergence measurements. We show experimental results indicating that our active method can reduce errors over a larger distance range than fixed-camera methods of estimating time-to-contact.

Original language	English
Title of host publication	Computer Analysis of Images and Patterns - 6th International Conference, CAIP 1995, Proceedings
Editors	Vaclav Hlavac, Radim Sara
Pages	944-949
Number of pages	6
DOIs	https://doi.org/10.1007/3-540-60268-2_407
State	Published - 1995
Event	6th International Conference on Computer Analysis of Images and Patterns, CAIP 1995 - Prague, Czech Republic Duration: Sep 6 1995 → Sep 8 1995

Publication series

Name	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume	970
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	6th International Conference on Computer Analysis of Images and Patterns, CAIP 1995
Country/Territory	Czech Republic
City	Prague
Period	9/6/95 → 9/8/95

Bibliographical note

Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 1995.

ASJC Scopus subject areas

Theoretical Computer Science
General Computer Science

Access to Document

10.1007/3-540-60268-2_407

Cite this

Seales, W. B. (1995). Measuring time-to-contact using active camera control. In V. Hlavac, & R. Sara (Eds.), Computer Analysis of Images and Patterns - 6th International Conference, CAIP 1995, Proceedings (pp. 944-949). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 970). https://doi.org/10.1007/3-540-60268-2_407

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author = "Seales, {W. Brent}",

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Seales, WB 1995, Measuring time-to-contact using active camera control. in V Hlavac & R Sara (eds), Computer Analysis of Images and Patterns - 6th International Conference, CAIP 1995, Proceedings. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 970, pp. 944-949, 6th International Conference on Computer Analysis of Images and Patterns, CAIP 1995, Prague, Czech Republic, 9/6/95. https://doi.org/10.1007/3-540-60268-2_407

Measuring time-to-contact using active camera control. / Seales, W. Brent.
Computer Analysis of Images and Patterns - 6th International Conference, CAIP 1995, Proceedings. ed. / Vaclav Hlavac; Radim Sara. 1995. p. 944-949 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 970).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Seales WB. Measuring time-to-contact using active camera control. In Hlavac V, Sara R, editors, Computer Analysis of Images and Patterns - 6th International Conference, CAIP 1995, Proceedings. 1995. p. 944-949. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)). doi: 10.1007/3-540-60268-2_407

Measuring time-to-contact using active camera control

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