A protocol and calibration method for accurate multi-camera field videography

Author:

Theriault Diane H.1,Fuller Nathan W.1,Jackson Brandon E.2,Bluhm Evan2,Evangelista Dennis2,Wu Zheng1,Betke Margrit1,Hedrick Tyson L.2

Affiliation:

1. Boston University, United States;

2. University of North Carolina at Chapel Hill, United States

Abstract

Abstract Stereo videography is a powerful technique for quantifying the kinematics and behavior of animals, but it can be challenging to use in an outdoor field setting. We here present a workflow and associated software for performing calibration of cameras placed in a field setting and estimating the accuracy of the resulting stereoscopic reconstructions. We demonstrate the workflow through example stereoscopic reconstructions of bat and bird flight. We provide software tools for planning experiments and processing the resulting calibrations that other researchers may use to calibrate their own cameras. Our field protocol can be deployed in a single afternoon, requiring only short video clips of light, portable calibration objects.

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

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3. Bouguet J.-Y. (1999). Visual Methods for Three-Dimensional Modeling. PhD thesis, California Institute of Technology, Pasadena, CA, USA.

4. The STARFLAG handbook on collective animal behaviour: 1. Empirical methods;Cavagna;Anim. Behav.,2008

5. Courtship dives of Anna's hummingbird offer insights into flight performance limits;Clark;Proc. Biol. Sci.,2009

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