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Journal of Applied Remote Sensing

Investigation of atmospheric insect wing-beat frequencies and iridescence features using a multispectral kHz remote detection system
Author(s): Alem K. Gebru; Erich G. Rohwer; Pieter Neethling; Mikkel S. Brydegaard
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Paper 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.

Paper Details

Date Published: 18 December 2014
PDF: 14 pages
J. Appl. Rem. Sens. 8(1) 083503 doi: 10.1117/1.JRS.8.083503
Published in: Journal of Applied Remote Sensing Volume 8, Issue 1
Show Author Affiliations
Alem K. Gebru, Stellenbosch Univ. (South Africa)
Erich G. Rohwer, Stellenbosch Univ. (South Africa)
Pieter Neethling, Stellenbosch Univ. (South Africa)
Mikkel S. Brydegaard, Stellenbosch Univ. (South Africa)
Lund Univ. (Sweden)
Lund Laser Ctr. (Sweden)

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