Fig. 10
From: Development of an accurate low cost NDVI imaging system for assessing plant health
Relationship between an NDVI calculated using NDVIRaspPi and NDVIMicasense, as measured by spectrometry. A An NDVI calculated using NDVIRaspPi shows a larger range of values before saturation, whereas NDVIMicasense quickly saturates at 0.8. Thus, NDVIRaspPi demonstrates a higher sensitivity to chlorophyll content, and does not saturate easily at high chlorophyll contents. The R2 is 0.31, therefore the relationship between the two indices is poor. Overall, the Raspberry Pi system shows promise as a robust NDVI imaging system, with higher sensitivity to plant health than common commercial NDVI imaging systems. B NDVIMicasense2 shows the same effect, however saturation (indicated by values above 0.8) has occurred for all measurements