Structural Timber Grain-Slope & Knot-Area-Ratio (EN 14081 Visual Strength) Grader

Deterministic 2D Gabor structure-tensor principal eigenvector field for grain angle + elliptical knot projection KAR per EN 14081 / ASTM D245 engine (.jpg, .heic, .png, .pdf) built for EN 14081, Stora Enso, Festool, Rothoblaas — zero-upload ephemeral Wasm RAM execution.

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