Applying Aggregation and Pre-Aggregation Functions in the Classification of Grape Berries

Douro region, in Portugal, is worldwide famous for its Port wine, having a huge economic importance in the region. Among the enological parameters that define the grape maturity, the sugar level is considered one of the most relevant ones. Then, in this study we intend to classify their sugar level based on reflectance measurements obtained by hyperspectral images from grapes collected in this region. Recently, to cope with classification problems, we have applied some generalizations of the Choquet integral in the fuzzy reasoning method of a fuzzy rule-based classification system. These generalizations produced different aggregation and/or pre-aggregation functions, presenting good results. For this reason, in this study, we have compared the performance of different generalizations among themselves and versus classical classifiers found in the specialized literature.