merge: lazy NCC

pm2d/line_matcher.py

@@ -591,6 +591,7 @@ class LineShapeMatcher:
         subpixel: bool = True,
         verify_ncc: bool = True,
         verify_threshold: float = 0.4,
+        ncc_skip_above: float = 0.85,
         coarse_angle_factor: int = 2,
         coarse_stride: int = 1,
         scale_penalty: float = 0.0,
@@ -902,7 +903,11 @@ class LineShapeMatcher:
                     search_radius=self._effective_angle_step() / 2.0,
                     original_score=score,
                 )
-            if verify_ncc:
+            # NCC verify lazy (Halcon-style): skip se shape-score gia molto
+            # alto (probabilita falso positivo trascurabile). NCC e l'op
+            # piu costosa per match (warp + corr), quindi vale la pena
+            # saltarlo quando il gradiente shape e gia conclusivo.
+            if verify_ncc and float(score_f) < ncc_skip_above:
                 ncc = self._verify_ncc(gray0, cx_f, cy_f, ang_f, var.scale)
                 if ncc < verify_threshold:
                     continue