*2.3. Data Annotation*

There are mainly two labeling methods for famous and excellent tea. One is to label the front view of famous and excellent tea squarely, as shown in Figure 5, and the other is to label famous and excellent tea images with the front view, side view and top view, respectively, as shown in Figure 6. Both methods can only be picked when the front view images are detected in the picking process. In addition, multi-angle labeling will increase the difficulty of control in mechanical picking and reduce the detection rate, which is unnecessary in the picking process of famous and excellent tea. Therefore, we chose the first labeling method, which only labeled the front view images. We annotated the dataset using the software of labeling. Specifically, the tender bud in the image was selected with a square frame and the label of tea was added. The format of the annotation file was selected in PascalVOC format, and the corresponding xml file was generated after saving. The software will save the image size, label name, target location and other information, as shown in Figure 5.

**Figure 5.** Front view of labeling.

**Figure 6.** Multi-view of labeling. (**a**) Red reflects the annotation of side view, cyan reflects the annotation of front view. (**b**) Yellow reflects the annotation of top view.
