Abrasive Blast-Cleaned Steel Surface Cleanliness (ISO 8501-1 Sa 2½ / SSPC-SP10) Grader

Deterministic White-patch normalized CIELAB reflectance segmentation of grey steel vs dark mill-scale/ferric-oxide shadows per cm² (ISO 8501-1 / SSPC VIS 1) engine (.jpg, .heic, .dng, .pdf) built for Jotun Marine, Hempel, International Paint, Graco EcoQuip — zero-upload ephemeral Wasm RAM execution.

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