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FlyLimbTracker: An Active Contour Based Approach for Leg Segment Tracking in Unmarked, Freely Behaving Drosophila

V. Uhlmann, P. Ramdya, R. Delgado-Gonzalo, R. Benton, M. Unser

PLoS ONE, vol. 12, no. 4, pp. 1-21, April 28, 2017.


Understanding the biological underpinnings of movement and action requires the development of tools for quantitative measurements of animal behavior. Drosophila melanogaster provides an ideal model for developing such tools: the fly has unparalleled genetic accessibility and depends on a relatively compact nervous system to generate sophisticated limbed behaviors including walking, reaching, grooming, courtship, and boxing. Here we describe a method that uses active contours to semi-automatically track body and leg segments from video image sequences of unmarked, freely behaving D. melanogaster. We show that this approach yields a more than 6-fold reduction in user intervention when compared with fully manual annotation and can be used to annotate videos with low spatial or temporal resolution for a variety of locomotor and grooming behaviors. FlyLimbTracker, the software implementation of this method, is open-source and our approach is generalizable. This opens up the possibility of tracking leg movements in other species by modifications of underlying active contour models.

@ARTICLE(http://bigwww.epfl.ch/publications/uhlmann1701.html,
AUTHOR="Uhlmann, V. and Ramdya, P. and Delgado-Gonzalo, R. and Benton,
	R. and Unser, M.",
TITLE="{FlyLimbTracker}: {A}n Active Contour Based Approach for Leg
	Segment Tracking in Unmarked, Freely Behaving
	{\textit{{D}rosophila}}",
JOURNAL="{PLoS ONE}",
YEAR="2017",
volume="12",
number="4",
pages="1--21",
month="April 28,",
note="")

© 2017 Uhlmann et al.. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from Uhlmann et al.. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
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