Influence of solar irradiance on hyperspectral imaging-based plant recognition for autonomous weed control

► Variation in sunlight intensity affects plant optical properties in 384-810 nm. ► Classification accuracy ranges from 88.2% to 95.1% with varying solar irradiance. ► Low solar irradiance model is more stable to changes in sunlight conditions. ► Global calibration achieves optimum accuracy of 90% for robust plant recognition.