Shortwave infrared hyperspectral imaging for detecting sour skin (Burkholderiacepacia)-infected onions

► An SWIR hyperspectral imaging system was explored to detect sour skin in onions. ► Healthy & infected onions showed distinct spectral characteristics in 950-1650 nm. ► Log-ratio images of onions were generated using images at 1070 & 1400 nm. ► SVM using image features (max, contrast, & homogeneity) achieved 87.14% accuracy. ► The study shows the potential of using spectral imaging to detect onion sour skin.