Probing insect backscatter cross-section and melanization using kHz optical remote detection system

Alem K. Gebru; Mikkel Brydegaard; Erich Rohwer; Pieter Neethling

doi:10.1117/12.2236010

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19 September 2016 Probing insect backscatter cross-section and melanization using kHz optical remote detection system

Alem K. Gebru, Mikkel Brydegaard, Erich Rohwer, Pieter Neethling

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Proceedings Volume 9975, Remote Sensing and Modeling of Ecosystems for Sustainability XIII; 997504 (2016) https://doi.org/10.1117/12.2236010
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

kHz optical remote sensing system is implemented to determine melanization and backscatter cross-section in the near infrared (NIR) and shortwave infrared (SWIR) in situ. It is shown that backscatter cross-section in the SWIR is insensitive to melanization and absolute melanization can be derived from the ratio of backscatter cross-section in two bands (SWIR/NIR). We have shown that insects reflect more strongly in the SWIR as compared to NIR and Visible (VIS) in accordance with previous findings. This is illustrated using three different insects (Snow white moth (spilosoma genus), Fox moth (Macrothylacia) and Leather beetle (Odontotaenius genus)) and it is shown that the reflectance of the Leather beetle in the VIS and NIR is more affected by melanization as compared with snow white moth.

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Alem K. Gebru, Mikkel Brydegaard, Erich Rohwer, and Pieter Neethling "Probing insect backscatter cross-section and melanization using kHz optical remote detection system", Proc. SPIE 9975, Remote Sensing and Modeling of Ecosystems for Sustainability XIII, 997504 (19 September 2016); https://doi.org/10.1117/12.2236010

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