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Fig. 9 | Plant Methods

Fig. 9

From: Development of an accurate low cost NDVI imaging system for assessing plant health

Fig. 9

Greenhouse measurements of French bean (Phaseolus vulgaris), collected under ambient lighting conditions with nine plants per image. (Black) NDVI measured with the Raspberry Pi, compared to spectrometry NDVI calculated with wavelengths at 620 nm for red and 750 nm for NIR (R2 = 0.62, y = 0.86x + 0.03). A (Red) NDVI measured by the Micasense RedEdge (NDVIMicasense1), compared to spectrometry NDVI calculated with wavelengths at 668 nm for red and 717 nm for NIR (R2 = 0.41, y = 0.77x + 0.11). B (Red) NDVI measured by the Micasense RedEdge ( NDVIMicasense2), compared to spectrometry NDVI calculated with wavelengths at 668 nm for red and 840 nm for NIR (R2 = 0.30, y = 0.47x + 0.44)

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