Instance Awareness of Multi-class Semantic Segmentation Loss Functions

ArXi:2604.24276v1 Announce Type: new Instance-sensitive losses for semantic segmentation such as blob loss and CC loss were designed to address instance imbalance, ensuring small lesions generate the same gradient as large ones, but operate only on single-class segmentation. In multi-class settings, class imbalance poses an additional problem: rare classes with few instances receive a disproportionately small share of the