Update README.md

add OpenCalib

Author: Deephome

README.md

@@ -71,3 +71,4 @@ For applications such as autonomous driving, robotics, navigation systems, and 3
 |[Autoware camera lidar calibrator](https://github.com/Autoware-AI/utilities/tree/master/autoware_camera_lidar_calibrator)|pick points mannually, PnP|*|
 |[Autoware calibration camera lidar](https://github.com/XidianLemon/calibration_camera_lidar)| checkerboard, similar to [LCCT](http://www.cs.cmu.edu/~ranjith/lcct.html) |[CN](https://adamshan.blog.csdn.net/article/details/81670732)|
 |[livox_camera_lidar_calibration](https://github.com/Livox-SDK/livox_camera_lidar_calibration)|pick points mannually, PnP| *|
+|[OpenCalib](https://github.com/PJLab-ADG/SensorsCalibration)|target-based, target-less, mannual|OpenCalib: A Multi-sensor Calibration Toolbox for Autonomous Driving|