Update server.py

server.py

@@ -353,6 +353,7 @@ def predict():
 
 @app.route('/predict_4x4', methods=['POST'])
 def predict_4x4():
+    """Optimized 4x4 prediction endpoint"""
     import time
     start_time = time.time()
     try:
@@ -378,6 +379,9 @@ def predict_4x4():
         if image_pil is None: return jsonify({"error": "Invalid image data"}), 400
         image_cv2 = cv2.cvtColor(np.array(image_pil), cv2.COLOR_RGB2BGR)
         
+        # baru perbaikan: Baris ini hilang dan menyebabkan NameError. Kita tambahkan kembali.
+        grid_images, grid_coordinates = divide_image_into_4x4_grid(image_cv2)
+        
         results = model(image_cv2, verbose=False)
         indices_to_click = []
         if results and results[0].masks is not None and results[0].boxes is not None: