Patch-siamese decision layer (reference-based print QC, synthetic prototype)

Trained on johko/print-sheet-qc-pairs. Input: two 96x96 RGB patches (reference patch, camera patch, same frame). Output: single logit; defect if sigmoid(logit) > 0.5.

Validation (unseen sheets, 1080 patches): accuracy 0.8157, AUROC 0.8794.

Synthetic-data prototype - expect a domain gap on real camera images.