Topology-Preserving Data Augmentation for Ring-Type Polygon Annotations
A new lightweight augmentation strategy repairs missing adjacency relations in polygon annotations for segmentation tasks, specifically addressing ring-type polygons with interior voids common in architectural floorplan analysis. The method preserves vertex order and achieves near-perfect Cyclic Adjacency Preservation across geometric transformations, improving annotation consistency.
Key facts
- Geometric data augmentation is widely used in segmentation workflows.
- Polygon annotations can become invalid after transformation in structured domains like architectural floorplan analysis.
- A region may contain an interior void encoded as part of a single ordered polygon chain.
- Cropping or clipping can remove bridge vertices, causing a semantic region to split into disconnected components.
- The proposed strategy repairs missing adjacency relations in index space while preserving original vertex order.
- The method adds minimal overhead and integrates into existing preprocessing workflows.
- Experiments show near-perfect Cyclic Adjacency Preservation (CAP) across common geometric transformations.
- The approach improves annotation consistency in polygon-based segmentation.
Entities
Institutions
- arXiv