fixed maybe crash

docs/start_camera_node.MD

@@ -16,7 +16,7 @@ This command initiates the camera node and enables the colored point cloud.
 
 Once the camera node is running, it will publish data on several ROS topics. Below is a list of the available topics:
 
-- **IMU and Gyro Information:**
+- **IMU Data and IMU Information:**
   - `camera/accel/imu_info`
   - `camera/gyro/imu_info`
   - `camera/gyro_accel/sample`

orbbec_camera/src/utils.cpp

@@ -383,6 +383,9 @@ OB_DEPTH_PRECISION_LEVEL depthPrecisionLevelFromString(
 
 float depthPrecisionFromString(const std::string &depth_precision_level_str) {
   // covert 0.8mm to 0.8
+   if (depth_precision_level_str.size() < 2) {
+    return 1.0;
+  }
   std::string depth_precision_level_str_num =
       depth_precision_level_str.substr(0, depth_precision_level_str.size() - 2);
   return std::stof(depth_precision_level_str_num);