diff --git a/biz/checkpoint/checkpoint_biz.py b/biz/checkpoint/checkpoint_biz.py
index 6a3f3a7..965df49 100644
--- a/biz/checkpoint/checkpoint_biz.py
+++ b/biz/checkpoint/checkpoint_biz.py
@@ -47,7 +47,10 @@ RTSP_TARGET_FPS = 10.0
 
 # ========================= Kadian TrafficMonitor（精简版，专为服务设计） =========================
 class KadianDetector:
-    def __init__(self, roi_points=ROI_RELATIVE, params=None):
+    def __init__(self, params=None):
+        # 摄像头额外参数
+        self.params = params if params is not None else {}
+
         # 模型加载
         self.detector = YOLOv8_ONNX(DETECT_MODEL_PATH, conf_threshold=0.25, iou_threshold=0.45,
                                     input_size=PERSON_CAR_INPUT_SIZE)
@@ -66,13 +69,10 @@ class KadianDetector:
 
         self.fps = RTSP_TARGET_FPS
 
-        # ROI 处理（支持相对/绝对）
-        #self.roi_points = roi_points.astype(np.int32)
+        # ROI 处理：优先从 params 获取，否则使用默认值 ROI_RELATIVE
+        roi_points = self.params.get('roi_points', ROI_RELATIVE)
         self.roi_points = np.array(roi_points, dtype=np.float64) if roi_points is not None else None
 
-        # 摄像头额外参数
-        self.params = params if params is not None else {}
-
         # ==========================================
         # 超参数设置 (Hyperparameters)
         # ==========================================
@@ -738,7 +738,7 @@ class FrameProcessorWorker(threading.Thread):
                 if cam_id not in self.kadian_detectors:
                     camera_config = self.cameras.get(cam_id)
                     params = camera_config.params if camera_config else None
-                    self.kadian_detectors[cam_id] = KadianDetector(params=params)
+                    self.kadian_detectors[cam_id] = KadianDetector(params)
                 detector = self.kadian_detectors[cam_id]
 
                 # 执行检测