SegmentationPostprocessing

Postprocessing for segmentation

Idea

Repair:

• overlapping neighbours
• extruding children
• invalid (self-intersecting) polygon paths
• too small (by height/width/area) regions
• gaps in reading order

Improve:

• align multiple segmentations, then vote/merge
• train classifiers for deletion/merge/split etc

Architecture

• use shapely.geometry
• low-level functions shared by multiple repair/improve tasks
• high-level functions with parameters exposed to ocrd-tool.json