Remove spaces, ".", and "-" from ALPR

modules/ANSLPR/ANSLPR.h

@@ -47,6 +47,14 @@ namespace ANSCENTER
             std::string lockedText;
             int lockCount = 0;
             int framesSinceLastSeen = 0;
+            // Frames since the last full OCR was used to verify the lock.  When
+            // skip-when-locked is active in ANSALPR_OCR::RunInference, this
+            // counter increments on every frame whose OCR was skipped; once it
+            // reaches the re-verify period, the next frame falls through to a
+            // real OCR run (resetting the counter) so a stale or wrong lock
+            // can self-correct via majority-vote re-lock.  Zero when not in
+            // use (e.g. raw OCR pass-through, pipeline mode).
+            int framesSinceVerify = 0;
         };
         // cameraId → (trackId → tracked plate)
         std::unordered_map<std::string, std::unordered_map<int, TrackedPlateById>> trackedPlatesById;
@@ -61,6 +69,26 @@ namespace ANSCENTER
 		[[nodiscard]] std::string checkPlate(const std::string& cameraId, const std::string& detectedPlate, const cv::Rect& plateBox);
 		// Hybrid API: trackId as primary identity, Levenshtein fallback for lost tracks
 		[[nodiscard]] std::string checkPlateByTrackId(const std::string& cameraId, const std::string& detectedPlate, int trackId);
+
+		// Skip-when-locked query: returns the locked plate text for (cameraId, trackId)
+		// if the caller may safely SKIP running OCR this frame, or an empty string if
+		// the caller must run OCR and feed the result back through checkPlateByTrackId.
+		//
+		// Behaviour:
+		//   * Track not found, or found but not locked yet  → returns "".
+		//   * Locked, and < `reverifyEvery` frames since the last full OCR for this
+		//     track   → returns the locked text and increments the per-track
+		//     re-verify counter.  Caller skips the recognizer entirely.
+		//   * Locked, and ≥ `reverifyEvery` frames since the last full OCR  →
+		//     returns "" and resets the counter, so the caller runs OCR this frame
+		//     and the regular voting/re-lock logic in checkPlateByTrackId can
+		//     self-correct a wrong lock or notice a vehicle swap on the same trackId.
+		//
+		// Side-effect: also resets framesSinceLastSeen so the periodic prune pass
+		// in checkPlateByTrackId does not retire a track just because we skipped
+		// OCR on it.  Without this the locked plate would silently disappear from
+		// the registry after a few hundred skipped frames.
+		[[nodiscard]] std::string tryReuseLockedText(const std::string& cameraId, int trackId, int reverifyEvery = 30);
     };
 
 	class ANSLPR_API ANSALPR {