“…Confocal-E dataset is a classic 3D pollen dataset that includes 5360 pollen grains from 27 different categories of pollen images collected by confocal laser scanning microscopy in Germany [13]. e pollen images, including Secale, Poaceae, and Fagus, are divided into three groups by sensitization, namely, highly allergenic, moderate allergenic, and lowly allergenic [26][27][28][29][30][31]. e dataset is augmented by taking different transformations, especially rotation transform, in order to validate the geometric invariance of the proposed method, which aims at increasing the volume of labeled training sets by applying transformations while preserving their class labels.…”