Analysis of bat wing beat frequency using Fourier transform

Atanbori, John, Cowling, Peter, Murray, John , Colston, Belinda, Eady, Paul, Hughes, Dave, Nixon, Ian and Dickinson, Patrick (2013) Analysis of bat wing beat frequency using Fourier transform. Lecture Notes in Computer Science, 8048 L (PART 2). pp. 370-377. ISSN 0302-9743

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Computer vision techniques have been used extensively to automatically monitor human activities; however, applications for analysing animal behaviour are sparse. The analysis of bat behaviour in particular has attracted only one or two studies. Most existing work uses either expensive thermal imaging equipment, or bespoke sensors which are not accessible to field researchers, ecologists, and scientists studying behaviour. The work we present here uses spectral analysis techniques to quantify wingbeat frequency, using a single imaging device in low-light. We propose two modified techniques based on bounded box metrics, and similarity matrices, for measuring periodic and cyclical motion as a 1D time domain signal. These are transformed to the frequency domain using Short Time Fourier Transform (STFT). Finally we evaluate these techniques against the baseline algorithm proposed by Cutler and Davis 5, using expert-annotated ground-truth data. © 2013 Springer-Verlag.

Additional Information:15th International Conference, CAIP 2013, York, UK, August 27-29, 2013, Proceedings, Part II Conference Code:99445
Keywords:Fourier transforms, Bats
Subjects:G Mathematical and Computer Sciences > G400 Computer Science
D Veterinary Sciences, Agriculture and related subjects > D300 Animal Science
Divisions:College of Science > School of Computer Science
College of Science > School of Life Sciences
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ID Code:12031
Deposited On:04 Oct 2013 09:01

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