The hardening pericarp information in the spectra seemed to have an influence on the classification accuracy. Table 1 shows accuracy of 89.1% for the averaged spectra set against 89.9% for the amended averaged spectra set and 91.2% for the individual spectra set in comparison to 92.0% for amended individual spectra set. In this case, the translucent flesh may cause a greater change in the intensity than the hardening pericarp. The Fisher's linear discriminant functions were studied in order to search for the most informative wavelengths. The coefficients with the highest values were found in the range 673–762 nm, which corresponded to the chlorophyll peak and the first water peak in the absorbance spectra. The chemical bands associated with this wavelength range are not understood and require further investigation.