pandid-valve-symbol-instance

To extract valve symbols from P&ID drawings, this tool isolates valve glyphs from nearby text and lines on prepared tiles. It generates one clean crop per valve symbol instance, ensuring text-only observations are filtered out and never produce rows.

The output format for isolated valve symbol crops uses a strict row-per-instance schema. Each row includes page-global coordinates, crop paths, symbol_class, and confidence values, ensuring traceability and ready integration with downstream valve_stub schemas.

Preparing tile-based P&ID drawings for valve symbol instance extraction requires dividing the documents into prepared tiles beforehand. The extractor then processes each tile individually to identify plausible valve glyphs and crop away adjacent text or lines.

Yes, valve symbol extraction strictly filters out text-only observations from P&ID tiles. Rows are only emitted after an isolated symbol crop has been successfully classified as a valve class, ensuring text never produces rows in the output.

Yes, you can use the extracted valve symbol data for quality assurance. The output ensures every row meets evidence requirements by capturing center coordinates, bounding boxes, symbol_class, and confidence scores, which supports downstream review and validation.