Remote Estimation of the Chlorophyll Concentration of Living Trees Using Laser-induced Fluorescence Imaging Lidar |
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Authors: | Yasunori Saito Koh-jiro Kurihara Hiroaki Takahashi Fumitoshi Kobayashi Takuya Kawahara Akio Nomura Satomi Takeda |
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Affiliation: | (1) Department of Environmental Science, Osaka Women’s University, 21 Daisen-cho, Sakai 590-0035, Japan;(2) Department of Information Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan |
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Abstract: | Monthly variation in chlorophyll concentration of living ginko tree leaves 65 m away from a system was remotely estimated by a laser-induced fluorescence imaging lidar. The combination of a pulsed laser and a short-time gated CCD using an image intensifier made it possible to monitor the weak fluorescence signal from the ginko tree leaves as an image. By applying the experimental idea that a ratio of intensity of the chlorophyll fluorescence at 740 nm to that at 685 nm showed a linear correlation to the chlorophyll concentration, the fluorescence image of the ginko tree obtained by the lidar was converted to the chlorophyll concentration distribution image. |
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Keywords: | chlorophyll tree laser-induced fluorescence lidar image CCD |
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