Research Papers

Investigation of atmospheric insect wing-beat frequencies and iridescence features using a multispectral kHz remote detection system

[+] Author Affiliations
Alem Gebru

Stellenbosch University, Laser Research Institute, Department of Physics, Private Bag X1, Matieland 7602, Stellenbosch, South Africa

Erich Rohwer

Stellenbosch University, Laser Research Institute, Department of Physics, Private Bag X1, Matieland 7602, Stellenbosch, South Africa

Pieter Neethling

Stellenbosch University, Laser Research Institute, Department of Physics, Private Bag X1, Matieland 7602, Stellenbosch, South Africa

Mikkel Brydegaard

Stellenbosch University, Laser Research Institute, Department of Physics, Private Bag X1, Matieland 7602, Stellenbosch, South Africa

Lund University, Center for Animal Movement, Department of Biology, Sölvegatan 37, 223 62 Lund, Sweden

Lund Laser Centre, Department of Physics, Sölvegatan 14, 223 62 Lund, Sweden

Hyspex, Norsk Elektro Optikk, Solheimsveien 62A, 1473 Lørenskog, Norway

J. Appl. Remote Sens. 8(1), 083503 (Dec 18, 2014). doi:10.1117/1.JRS.8.083503
History: Received September 19, 2014; Accepted November 21, 2014
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Abstract.  Quantitative investigation of insect activity in their natural habitat is a challenging task for entomologists. It is difficult to address questions such as flight direction, predation strength, and overall activities using the current techniques such as traps and sweep nets. A multispectral kHz remote detection system using sunlight as an illumination source is presented. We explore the possibilities of remote optical classification of insects based on their wing-beat frequencies and iridescence features. It is shown that the wing-beat frequency of the fast insect events can be resolved by implementing high-sampling frequency. The iridescence features generated from the change of color in two channels (visible and near-infrared) during wing-beat cycle are presented. We show that the shape of the wing-beat trajectory is different for different insects. The flight direction of an atmospheric insect is also determined using a silicon quadrant detector.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Alem Gebru ; Erich Rohwer ; Pieter Neethling and Mikkel Brydegaard
"Investigation of atmospheric insect wing-beat frequencies and iridescence features using a multispectral kHz remote detection system", J. Appl. Remote Sens. 8(1), 083503 (Dec 18, 2014). ; http://dx.doi.org/10.1117/1.JRS.8.083503


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