v3 weights (yolo11s, 204k merged plate dataset, val mAP50=0.944)

miner.py

@@ -161,7 +161,10 @@ class Miner:
         # conf=0.16, score_threshold=0.01 with our v3 ONNX: HIGH recall
         # 57% -> 66% (+3 plates) at the cost of +2 singletons. Net positive
         # given 0.6 weight on map50 vs 0.4 on false_positive in composite.
-        self.conf_threshold = 0.16
+        # 2026-04-30: lowered to 0.12 after bench sweep on 33-task archive +
+        # 30-frame starter showed +1.6pp HIGH recall (0.8607→0.8770) for only
+        # +2 phantoms (+0.061/frame), 1:1 hit-to-phantom ratio.
+        self.conf_threshold = 0.12
         # Soft-NMS hyperparameters (Gaussian variant).
         # Tightened 0.5 → 0.3: sharper decay collapses near-duplicates from SAHI
         # tile-seam overlaps faster, dropping more below the 0.01 score floor.