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

modules/ANSLPR/ANSLPR.cpp

@@ -450,6 +450,53 @@ namespace ANSCENTER {
 		}
 	}
 
+	// Skip-when-locked query — see header for full contract.
+	//
+	// Returns the locked plate text if the caller may skip OCR this frame for
+	// (cameraId, trackId), or "" if the caller must run OCR.  Increments the
+	// re-verify counter on skip; resets it when the counter hits reverifyEvery
+	// so the next frame falls through to a real OCR run.
+	std::string ALPRChecker::tryReuseLockedText(const std::string& cameraId,
+	                                             int trackId,
+	                                             int reverifyEvery) {
+		std::lock_guard<std::recursive_mutex> lock(_mutex);
+		try {
+			auto camIt = trackedPlatesById.find(cameraId);
+			if (camIt == trackedPlatesById.end()) return "";
+			auto& plates = camIt->second;
+			auto it = plates.find(trackId);
+			if (it == plates.end()) return "";
+
+			auto& tp = it->second;
+			if (tp.lockedText.empty()) return "";  // not locked yet — caller must run OCR
+
+			// Locked.  Decide whether to skip this frame's OCR or fall through
+			// for a periodic re-verify.  reverifyEvery <= 0 means "always skip"
+			// (no re-verify), reverifyEvery == 1 means "always run OCR".
+			if (reverifyEvery > 0 && tp.framesSinceVerify >= reverifyEvery) {
+				tp.framesSinceVerify = 0;
+				ANS_DBG("ALPR_TrackId",
+					"cam=%s tid=%d REVERIFY (every=%d) — letting OCR through",
+					cameraId.c_str(), trackId, reverifyEvery);
+				return "";  // signal: caller should run OCR this frame
+			}
+
+			++tp.framesSinceVerify;
+			// Keep the entry alive — checkPlateByTrackId is what normally
+			// resets framesSinceLastSeen, but on skipped frames it's never
+			// called, and the prune pass would eventually delete this lock.
+			tp.framesSinceLastSeen = 0;
+			ANS_DBG("ALPR_TrackId",
+				"cam=%s tid=%d SKIP-LOCKED text='%s' reverifyIn=%d",
+				cameraId.c_str(), trackId, tp.lockedText.c_str(),
+				reverifyEvery > 0 ? (reverifyEvery - tp.framesSinceVerify) : -1);
+			return tp.lockedText;
+		}
+		catch (const std::exception&) {
+			return "";  // any failure → fall back to running OCR
+		}
+	}
+
 	//
 	static void VerifyGlobalANSALPRLicense(const std::string& licenseKey) {
 		try {