Anton Backhaus Thorsten Luettel Mirko Mählisch Knowledge Distillation for Semantic Segmentation: A Label Space Unification Approach. 12488-12493 2025 IROS https://doi.org/10.1109/IROS60139.2025.11246619 conf/iros/2025 db/conf/iros/iros2025.html#BackhausLM25 streams/conf/iros