# Image-to-dimension scale
# Scope: Planar image scale from a reference on the same plane; no perspective correction.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

referenceLength = 100 mm
referencePixels = 500
measuredPixels = 200

scale := referenceLength/referencePixels [mm]
length := measuredPixels*scale [mm]

check measured length budget: length <= 50 mm

scenario alternative: referenceLength = 80 mm