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Fig. 3 | Plant Methods

Fig. 3

From: The impact of variable illumination on vegetation indices and evaluation of illumination correction methods on chlorophyll content estimation using UAV imagery

Fig. 3

Empirical line method illumination correction curve based on reference panels. The left-hand figure is for a sunny day (14th, August) and the right-hand figure is for an overcast day (18th, August). The X-axis represents the image raw DNs of panels captured under each scenario, and the y-axis is the reflectance of reference panels

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