From a paper pattern to a verifiable DXF
Photograph, calibrate, verify and save a contour in millimetres. Working materials and version history stay within the business.
Who it is for
Furniture and textile manufacturers with paper pattern archives.
What it enables
Patterns gain editable digital contours and version history. Validation separates drafts from export-ready files, while local storage keeps photos off external services. Real cutting tolerances still require calibration and physical validation.
Move paper and cardboard patterns into a digital production workflow while retaining measurable quality control and keeping working photos off external services.
- Perspective, optics and lighting affect measurement; physical accuracy cannot be certified by UI and synthetic tests alone.
- Source photos, contours and version history must remain on the local machine.
- Invalid or unfinished geometry must never enter a production DXF.
- Four-point projective calibration with independent check points and resolution validation.
- Semi-automatic draft contours, manual editing and checks for weak edges, self-intersections and cutouts.
- A versioned local archive, backups and DXF/SVG export without overwriting prior files.
04 System scope
What was designed and built
Desktop and tablet workspace
Contour and calibration QA engine
DXF/SVG output and versioned local archive
05 Verified scale
47 automated checks: 36 JavaScript and 11 Python
Test DXF: AC1015, millimetres, one closed 120 × 80 mm polyline
Validated at 1440 × 900 desktop and two tablet layouts
Production workflow, workspace UX, homography geometry, quality gates, local archive, safe exports and regression validation.