11 November 2016 Low-cost chlorophyll meter (LCCM): portable measuring device for leaf chlorophyll
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Proceedings Volume 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016); 101500V (2016) https://doi.org/10.1117/12.2243607
Event: Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 2016, Bali, Indonesia
Abstract
Portable leaf chlorophyll meter, named low-cost chlorophyll meter (LCCM), has been created. This device was created to help farmer determining the health condition of plant based on the greenness level of leaf surface. According to previous studies, leaf greenness with a certain amount of chlorophyll level has a direct correlation with the amount of nitrogen in the leaf that indicates health of the plant and this fact needed to provide an estimate of further measures to keep the plants healthy. Device that enables to measure the leaf color change is soil plant analysis development (SPAD) meter 502 from Konica Minolta but it is relatively expensive. To answer the need of low-cost chlorophyll scanner device, this research conducted experiment using light reflectance as the base mechanism. Reflectance system from LCCM consists of near-infrared light emitting diode (LED) and red LED as light resources and photodiode. The output from both of light resources calculated using normalized difference vegetation index (NDVI) formula as the results fetched and displayed on the smartphone application using Bluetooth communication protocol. Finally, the scanner has been made as well as the Android application named NDVI Reader. The LCCM system which has been tested on 20 sample of cassava leaf with SPAD meter as a variable control showed coefficient of determination 0.9681 and root-mean-square error (RMSE) 0.014.
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Evan Hutomo E. P., Marcelinus Alfasisurya S. Adibawa, Kestrilia R. Prilianti, Heriyanto Heriyanto, Tatas H. P. Brotosudarmo, "Low-cost chlorophyll meter (LCCM): portable measuring device for leaf chlorophyll", Proc. SPIE 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 101500V (11 November 2016); doi: 10.1117/12.2243607; https://doi.org/10.1117/12.2243607
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