add

README.md

@@ -306,6 +306,9 @@ source devel/setup.bash
 roslaunch multi_calibration auto_calibration.launch laser_cam:=2
 ```
 Then you can get the laser calibration result in ```cfg``` folder in ```calib_results.txt```. Then, when you relaunch the ```auto_calibration.launch``` with laser_cam:=3 you can see the laser calibration verification program. It will get the calibration data from ```calib_results.txt``` and show the following image.
+```shell
+roslaunch multi_calibration auto_calibration.launch laser_cam:=3
+```
 <p align="center">
     <img src="images/laser_check.png" alt="Image Viewer Panel" width="500"/>
 </p>