AutoCAD Lines to Text OCR
Intelligent text extraction and replacement in AutoCAD drawings
Problem
Engineering companies frequently need to update text across large sets of legacy AutoCAD drawings — tag numbers, revision marks, company names after acquisitions — and doing it manually across hundreds of DWGs costs days of draughting time.
Approach
A Python pipeline uses OpenCV to locate text regions in DWG/PDF exports, Tesseract OCR to read the text, then maps detected strings to replacements using a rules file. AutoLISP scripts push the changes back into the live AutoCAD drawing objects with full undo support.
Result
Batch text replacement across drawing sets that previously took days now completes in minutes. The pipeline handles multiple drawing scales, text styles, and layer configurations automatically.
Tech Stack
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