Fig. 6

Performance evaluation curves of YOLOv8 model for bounding box and mask predictions. This figure presents the detailed performance metrics of the trained YOLOv8 model. Panels (A–D) show the results for bounding box predictions: (A) F1 score curve, (B) precision curve, (C) precision-recall curve, and (D) recall curve. Panels (E–H) depict the corresponding metrics for instance mask predictions: (E) F1 score curve, (F) precision curve, (G) precision-recall curve, and (H) recall curve. These curves illustrate the model’s detection and segmentation performance across varying confidence thresholds, helping to assess its overall effectiveness and reliability in identifying and segmenting stomata.