Hung-Window Channel Balance Top/Bottom Shoe & Spring Stamp Optical Identifier

Deterministic Ruler/ID-1 scale normalization + 2D silhouette Fourier descriptor shoe classification + CLAHE stamped-digit OCR engine (.jpg, .heic, .png, .pdf) built for Caldwell, Andersen, Pella, SWISCO — zero-upload ephemeral Wasm RAM execution.

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