Temperature-stabilized laser-based sensors for accurate plant discrimination
Computers and Electronics in Agriculture
Electron Science Research Institute
We propose the use of temperature-stabilized lasers to improve the accuracy of a spectral-reflectance-based plant discrimination sensor for use in selective herbicide spraying systems. The discrimination of Canola from Wild-radish is based on Normalized Difference Vegetation Index (NDVI) measurements at two different laser wavelengths. Indoor experimental results show that the relative discrimination accuracy for a temperature non-stabilized sensor drops to 12.5% when the laser temperature varies between 16 °C and 34 °C. Experimental results also show that by controlling the temperature of the laser diodes, canola crops can be discriminated from wild radish weeds with accuracy as high as 90%.
Askraba, S., Paap, A., Alameh, K., Rowe, J., & Miller, C. (2017). Temperature-stabilized laser-based sensors for accurate plant discrimination. Computers and Electronics in Agriculture, 140, 317-326. https://doi.org/10.1016/j.compag.2017.06.017