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Segment unknown objects using top-down learning and bottom-up segmentations with UDOS

Segment unknown objects using top-down learning and bottom-up segmentations with UDOS


Open-world Instance Segmentation: Top-down Learning with Bottom-up Supervision

arXiv paper abstract https://arxiv.org/abs/2303.05503



Many top-down architectures for instance segmentation achieve significant success when trained and tested on pre-defined closed-world taxonomy.


However, when deployed in the open world, they exhibit notable bias towards seen classes and suffer from significant performance drop.


... propose ... approach for open world instance segmentation called bottom-Up and top-Down Open-world Segmentation (UDOS) that combines classical bottom-up segmentation algorithms within a top-down learning framework.


UDOS first predicts parts of objects using a top-down network trained with weak supervision from bottom-up segmentations. The bottom-up segmentations are class-agnostic and do not overfit to specific taxonomies.


The part-masks are then fed into affinity-based grouping and refinement modules to predict robust instance-level segmentations. UDOS enjoys both the speed and efficiency from the top-down architectures and the generalization ability to unseen categories from bottom-up supervision.


... UDOS ... achieving significant improvements over state-of-the-art across the board ...



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