Extraction¶

Status: Current lab input stage; region-first vectorization remains stopped

Authority: Accepted decision DL-010 and current Detection input contracts

Last reviewed: 2026-08-14

Question¶

What does Extraction receive, do, produce, and refuse to claim?

Short answer¶

Extraction captures page evidence from a source drawing. It prepares Detection inputs. It keeps page coordinates. It does not claim finished engineering meaning.

Receives¶

A source drawing page or prepared raster capture
Capture settings and extractor identity
Optional human click or review-region selection for cleanup experiments

Does¶

Retains ink and paper evidence for later stages
Builds reviewable input regions without inventing a new coordinate system
Keeps method, settings, and provenance with the capture
Preserves the protected whole-sheet vectorizer as a separately identified baseline

Produces¶

Detection inputs with page coordinates
Cached page rasters and masks where the lab stores them
Accounting regions such as working area and side or corner partitions when those experiments run

Does not claim¶

That a retained region is a typed information island
That a working-area rectangle is semantic truth
That region-first local vectorization is accepted
That Extraction accuracy equals validated product accuracy

Next stage receives¶

Detection receives Extraction inputs, caches, and review state. Detection may reuse those caches without regenerating every full-page layer.

Important retained history¶

Whole-sheet processing remains a baseline. Raw information-island accounting remains a retained doctrine. Human-scale region usefulness failed the frozen gate, so region-first assembly stayed stopped. See Whole Sheet to Information Islands.

Open Questions¶

Which Extraction captures become the default Detection input set for every new sheet?

Sources¶

Accepted decision: DL-010 (2026-07-31 and later updates)
Current contract: table-dimension-detection-architecture.md (2026-08-12)
Approaches history pages in this surface