In the provided code for calculating the F1 metric for Task 2, there is a potential issue with the matching of cell instances. The matching is directly based on the IoU (Intersection over Union) of binary masks. However, in the Ground Truth (GT), some cells are adherent and their binary masks cannot be separated. This can lead to failed matches and, consequently, an incorrect calculation of the F1 score. Thank you for your attention to this matter.

Created by ?? ? cjjj
The KPIs challenge in general is a semantic segmentation task. We agree that such a situation might happen. After checking, this situation occurs in a small number of cases. Based on our evaluation, that would not affect the ranking of the methods.

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