This Dataset consists of more than 4000 images of olive leafs of four different cultivars (Cobrançosa, Madural, Negrinha e Verdeal). The collection was carried out in olive groves where other studies have already been conducted and in partnership with certified technical personnel in the area to guarantee that only samples of the desired cultivars were collected. This collection process was planned to follow all the seasons of the year and consequently the growth and recession of the leaves, as well as other factors that have an impact on their development, such as water or nutrient stress, thus guaranteeing a correct identification regardless of the stage and the conditions in which the tree is found. After stipulating the duration of the collections, the collection method was also defined, being as random as possible, collecting leaves of the year, as well as older leaves, from the inside and outside of the canopy in an average of 20-25 leaves per tree of the selected cultivars. Being all the leafs collected in Suçães (41.49ºN, 7.26ºW), with an average altitude of 350 meters, belonging to the district of Bragança and the municipality of Mirandela.
