fix dataset: only full frame, 60s cooldown per plate

alpr-service/main.py

@@ -30,22 +30,35 @@ detection_lock = threading.Lock()
 # Cola para procesamiento OCR asíncrono (ahora incluye frame completo)
 ocr_queue = Queue(maxsize=5)
 
+# Cooldown para evitar múltiples capturas de la misma patente
+DATASET_COOLDOWN = 60  # segundos entre capturas de la misma patente
+recent_captures = {}  # {plate_number: timestamp}
+captures_lock = threading.Lock()
+
 # Crear carpeta de dataset si no existe
 os.makedirs(DATASET_DIR, exist_ok=True)
 print(f"📁 Dataset directory: {DATASET_DIR}")
 
-def save_plate_capture(plate_number, plate_img, full_frame):
-    """Guarda la captura de la patente para el dataset"""
+def save_plate_capture(plate_number, full_frame):
+    """Guarda la captura de la patente para el dataset con cooldown"""
+    current_time = time.time()
+    
+    # Verificar cooldown
+    with captures_lock:
+        if plate_number in recent_captures:
+            elapsed = current_time - recent_captures[plate_number]
+            if elapsed < DATASET_COOLDOWN:
+                return False  # Aún en cooldown, no guardar
+        
+        # Actualizar timestamp
+        recent_captures[plate_number] = current_time
+    
     try:
         timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
         
-        # Guardar imagen recortada de la patente
-        plate_filename = f"{DATASET_DIR}/{plate_number}_{timestamp}_plate.jpg"
-        cv2.imwrite(plate_filename, plate_img, [cv2.IMWRITE_JPEG_QUALITY, 95])
-        
-        # Guardar frame completo con contexto
-        frame_filename = f"{DATASET_DIR}/{plate_number}_{timestamp}_full.jpg"
-        cv2.imwrite(frame_filename, full_frame, [cv2.IMWRITE_JPEG_QUALITY, 90])
+        # Solo guardar frame completo
+        filename = f"{DATASET_DIR}/{plate_number}_{timestamp}.jpg"
+        cv2.imwrite(filename, full_frame, [cv2.IMWRITE_JPEG_QUALITY, 95])
         
         print(f"📸 Saved to dataset: {plate_number}")
         return True
@@ -87,8 +100,8 @@ def ocr_worker(reader):
                 if len(clean_text) >= 6 and validate_plate(clean_text):
                     # Enviar al backend
                     send_plate(clean_text)
-                    # Guardar captura para dataset
-                    save_plate_capture(clean_text, plate_img, full_frame)
+                    # Guardar captura para dataset (con cooldown)
+                    save_plate_capture(clean_text, full_frame)
         except:
             pass