[ how to build it]
- mkdir -p d435iRgbd_ws/src
- cd d435iRgbd_ws/src
- git clone https://github.com/Wenky1996/sub_rgbd.git
- cd ..
- catkin_make
[ how to run it]
- roslaunch realsense2_camera rs_rgbd.launch
- source devel/setup.zsh or setup.bash
- rosrun sub_rgbd sub_rgbd.py **