1. You need to look into the OCR-specific literature of DL (e.g. udop) or segmentation-based (e.g. segment-anything) 2. BigTech and SmallTech train their fancy

1. You need to look into the OCR-specific literature of DL (e.g. udop) or segmentation-based (e.g. segment-anything) 2. BigTech and SmallTech train their fancy bounding box / detection models on large datasets that have been built using classical detectors and a ton of manual curation