pequeno gaurd no weed detector contra overflow

AgroBase/AgroBase/bin/x64/Debug/Python/Scripts/workers/weed_worker/weed_detector.py

@@ -650,9 +650,12 @@ class WeedDetector:
             cfg=cfg,
         )
 
-        # Integral image para somar retângulos rápido.
+        # Integral image em inteiro com sinal.
+        # Evita overflow nos cálculos A - B - C + D.
         ii = np.pad(
-            mask_target.astype(np.uint8).cumsum(axis=0).cumsum(axis=1),
+            mask_target.astype(np.int64, copy=False)
+            .cumsum(axis=0, dtype=np.int64)
+            .cumsum(axis=1, dtype=np.int64),
             ((1, 0), (1, 0)),
             mode="constant",
             constant_values=0,