Visual tracking of small animals in cluttered natural environments using a freely moving camera

Risse, Benjamin and Mangan, Michael and Del Pero, Luca and Webb, Barbara (2017) Visual tracking of small animals in cluttered natural environments using a freely moving camera. In: The IEEE International Conference on Computer Vision (ICCV), 22 - 29 October 2017, Venice.

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Item Type:Conference or Workshop contribution (Paper)
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Abstract

Image-based tracking of animals in their natural habitats can provide rich behavioural data, but is very challenging due to complex and dynamic background and target appearances. We present an effective method to recover the positions of terrestrial animals in cluttered environments from video sequences filmed using a freely moving monocular camera. The method uses residual motion cues to detect the targets and is thus robust to different lighting conditions and requires no a-priori appearance model of the animal or environment. The detection is globally optimised based on an inference problem formulation using factor graphs. This handles ambiguities such as occlusions and intersections and provides automatic initialisation. Furthermore, this formulation allows a seamless integration of occasional user input for the most difficult situations, so that the effect of a few manual position estimates are smoothly distributed over long sequences. Testing our system against a benchmark dataset featuring small targets in natural scenes, we obtain 96 accuracy for fully automated tracking. We also demonstrate reliable tracking in a new data set that includes different targets (insects, vertebrates or artificial objects) in a variety of environments (desert, jungle, meadows, urban) using different imaging devices (day / night vision cameras, smart phones) and modalities (stationary, hand-held, drone operated). We will publish our algorithm and our wildlife animal tracking ground truth database as open source resources.

Keywords:tracking, computer vision
Subjects:G Mathematical and Computer Sciences > G740 Computer Vision
C Biological Sciences > C180 Ecology
C Biological Sciences > C120 Behavioural Biology
C Biological Sciences > C300 Zoology
C Biological Sciences > C850 Cognitive Psychology
Divisions:College of Science > School of Computer Science
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ID Code:29352
Deposited On:07 Nov 2017 10:11

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